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codegen.c

/* src/vm/jit/x86_64/codegen.c - machine code generator for x86_64

   Copyright (C) 1996-2005, 2006, 2007, 2008
   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO

   This file is part of CACAO.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

*/


#include "config.h"

#include <assert.h>
#include <stdio.h>
#include <stdint.h>

#include "vm/types.h"

#include "md-abi.h"

#include "vm/jit/x86_64/arch.h"
#include "vm/jit/x86_64/codegen.h"
#include "vm/jit/x86_64/emit.h"

#include "mm/memory.h"

#include "native/jni.h"
#include "native/localref.h"
#include "native/native.h"

#include "threads/lock-common.h"

#include "vm/builtin.h"
#include "vm/exceptions.h"
#include "vm/global.h"
#include "vm/primitive.h"
#include "vm/stringlocal.h"
#include "vm/vm.h"

#include "vm/jit/abi.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/code.h"
#include "vm/jit/codegen-common.h"
#include "vm/jit/dseg.h"
#include "vm/jit/emit-common.h"
#include "vm/jit/jit.h"
#include "vm/jit/linenumbertable.h"
#include "vm/jit/methodheader.h"
#include "vm/jit/parse.h"
#include "vm/jit/patcher-common.h"
#include "vm/jit/reg.h"
#include "vm/jit/replace.h"
#include "vm/jit/stacktrace.h"
#include "vm/jit/trap.h"

#if defined(ENABLE_LSRA)
# include "vm/jit/allocator/lsra.h"
#endif

#include "vmcore/loader.h"
#include "vmcore/options.h"
#include "vmcore/statistics.h"


/* codegen_emit ****************************************************************

   Generates machine code.

*******************************************************************************/

bool codegen_emit(jitdata *jd)
{
      methodinfo         *m;
      codeinfo           *code;
      codegendata        *cd;
      registerdata       *rd;
      s4                  len, s1, s2, s3, d, disp;
      u2                  currentline;
      ptrint              a;
      varinfo            *var, *dst;
      basicblock         *bptr;
      instruction        *iptr;
      constant_classref  *cr;
      unresolved_class   *uc;
      methodinfo         *lm;             /* local methodinfo for ICMD_INVOKE*  */
      unresolved_method  *um;
      builtintable_entry *bte;
      methoddesc         *md;
      fieldinfo          *fi;
      unresolved_field   *uf;
      s4                  fieldtype;
      s4                 varindex;

      /* get required compiler data */

      m    = jd->m;
      code = jd->code;
      cd   = jd->cd;
      rd   = jd->rd;

      /* prevent compiler warnings */

      d   = 0;
      lm  = NULL;
      um  = NULL;
      bte = NULL;

      {
      s4 i, p, t, l;
      s4 savedregs_num;

      savedregs_num = 0;

      /* space to save used callee saved registers */

      savedregs_num += (INT_SAV_CNT - rd->savintreguse);
      savedregs_num += (FLT_SAV_CNT - rd->savfltreguse);

      cd->stackframesize = rd->memuse + savedregs_num;

#if defined(ENABLE_THREADS)
      /* space to save argument of monitor_enter */

      if (checksync && code_is_synchronized(code))
            cd->stackframesize++;
#endif

      /* Keep stack of non-leaf functions 16-byte aligned for calls into
         native code e.g. libc or jni (alignment problems with
         movaps). */

      if (!code_is_leafmethod(code) || opt_verbosecall)
            cd->stackframesize |= 0x1;

      /* create method header */

      (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
      (void) dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */

      code->synchronizedoffset = rd->memuse * 8;

      if (code_is_leafmethod(code))
            (void) dseg_add_unique_s4(cd, 1);                  /* IsLeaf          */
      else
            (void) dseg_add_unique_s4(cd, 0);                  /* IsLeaf          */

      (void) dseg_add_unique_s4(cd, INT_SAV_CNT - rd->savintreguse); /* IntSave */
      (void) dseg_add_unique_s4(cd, FLT_SAV_CNT - rd->savfltreguse); /* FltSave */

#if defined(ENABLE_PROFILING)
      /* generate method profiling code */

      if (JITDATA_HAS_FLAG_INSTRUMENT(jd)) {
            /* count frequency */

            M_MOV_IMM(code, REG_ITMP3);
            M_IINC_MEMBASE(REG_ITMP3, OFFSET(codeinfo, frequency));

            PROFILE_CYCLE_START;
      }
#endif

      /* create stack frame (if necessary) */

      if (cd->stackframesize)
            M_ASUB_IMM(cd->stackframesize * 8, REG_SP);

      /* save used callee saved registers */

      p = cd->stackframesize;
      for (i = INT_SAV_CNT - 1; i >= rd->savintreguse; i--) {
            p--; M_LST(rd->savintregs[i], REG_SP, p * 8);
      }
      for (i = FLT_SAV_CNT - 1; i >= rd->savfltreguse; i--) {
            p--; M_DST(rd->savfltregs[i], REG_SP, p * 8);
      }

      /* take arguments out of register or stack frame */

      md = m->parseddesc;

      for (p = 0, l = 0; p < md->paramcount; p++) {
            t = md->paramtypes[p].type;

            varindex = jd->local_map[l * 5 + t];

            l++;
            if (IS_2_WORD_TYPE(t))    /* increment local counter for 2 word types */
                  l++;

            if (varindex == UNUSED)
                  continue;

            var = VAR(varindex);
            
            s1 = md->params[p].regoff;

            if (IS_INT_LNG_TYPE(t)) {                    /* integer args          */
                  if (!md->params[p].inmemory) {           /* register arguments    */
                        if (!IS_INMEMORY(var->flags))
                              M_INTMOVE(s1, var->vv.regoff);
                        else
                            M_LST(s1, REG_SP, var->vv.regoff);
                  }
                  else {                                 /* stack arguments       */
                        if (!IS_INMEMORY(var->flags))
                              /* + 8 for return address */
                              M_LLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1 + 8);
                        else
                              var->vv.regoff = cd->stackframesize * 8 + s1 + 8;
                  }
            }
            else {                                     /* floating args         */
                  if (!md->params[p].inmemory) {           /* register arguments    */
                        if (!IS_INMEMORY(var->flags))
                              M_FLTMOVE(s1, var->vv.regoff);
                        else
                              M_DST(s1, REG_SP, var->vv.regoff);
                  }
                  else {                                 /* stack arguments       */
                        if (!IS_INMEMORY(var->flags))
                              M_DLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1 + 8);
                        else
                              var->vv.regoff = cd->stackframesize * 8 + s1 + 8;
                  }
            }
      }

      /* save monitorenter argument */

#if defined(ENABLE_THREADS)
      if (checksync && code_is_synchronized(code)) {
            /* stack offset for monitor argument */

            s1 = rd->memuse;

            if (opt_verbosecall) {
                  M_LSUB_IMM((INT_ARG_CNT + FLT_ARG_CNT) * 8, REG_SP);

                  for (p = 0; p < INT_ARG_CNT; p++)
                        M_LST(abi_registers_integer_argument[p], REG_SP, p * 8);

                  for (p = 0; p < FLT_ARG_CNT; p++)
                        M_DST(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);

                  s1 += INT_ARG_CNT + FLT_ARG_CNT;
            }

            /* decide which monitor enter function to call */

            if (m->flags & ACC_STATIC) {
                  M_MOV_IMM(&m->clazz->object.header, REG_A0);
            }
            else {
                  M_TEST(REG_A0);
                  M_BNE(8);
                  M_ALD_MEM(REG_A0, TRAP_NullPointerException);
            }

            M_AST(REG_A0, REG_SP, s1 * 8);
            M_MOV_IMM(LOCK_monitor_enter, REG_ITMP1);
            M_CALL(REG_ITMP1);

            if (opt_verbosecall) {
                  for (p = 0; p < INT_ARG_CNT; p++)
                        M_LLD(abi_registers_integer_argument[p], REG_SP, p * 8);

                  for (p = 0; p < FLT_ARG_CNT; p++)
                        M_DLD(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);

                  M_LADD_IMM((INT_ARG_CNT + FLT_ARG_CNT) * 8, REG_SP);
            }
      }
#endif

#if !defined(NDEBUG)
      if (JITDATA_HAS_FLAG_VERBOSECALL(jd))
            emit_verbosecall_enter(jd);
#endif /* !defined(NDEBUG) */

      }

      /* end of header generation */

      /* create replacement points */

      REPLACEMENT_POINTS_INIT(cd, jd);

      /* walk through all basic blocks */

      for (bptr = jd->basicblocks; bptr != NULL; bptr = bptr->next) {

            bptr->mpc = (u4) ((u1 *) cd->mcodeptr - cd->mcodebase);

            if (bptr->flags >= BBREACHED) {

            /* branch resolving */

            codegen_resolve_branchrefs(cd, bptr);

            /* handle replacement points */

            REPLACEMENT_POINT_BLOCK_START(cd, bptr);

            /* copy interface registers to their destination */

            len = bptr->indepth;
            MCODECHECK(512);

#if defined(ENABLE_PROFILING)
            /* generate basicblock profiling code */

            if (JITDATA_HAS_FLAG_INSTRUMENT(jd)) {
                  /* count frequency */

                  M_MOV_IMM(code->bbfrequency, REG_ITMP3);
                  M_IINC_MEMBASE(REG_ITMP3, bptr->nr * 4);

                  /* if this is an exception handler, start profiling again */

                  if (bptr->type == BBTYPE_EXH)
                        PROFILE_CYCLE_START;
            }
#endif

#if defined(ENABLE_LSRA)
            if (opt_lsra) {
                  while (len) {
                        len--;
                        src = bptr->invars[len];
                        if ((len == bptr->indepth-1) && (bptr->type != BBTYPE_STD)) {
                              if (bptr->type == BBTYPE_EXH) {
/*                            d = reg_of_var(rd, src, REG_ITMP1); */
                                    if (!IS_INMEMORY(src->flags))
                                          d= src->vv.regoff;
                                    else
                                          d=REG_ITMP1;
                                    M_INTMOVE(REG_ITMP1, d);
                                    emit_store(jd, NULL, src, d);
                              }
                        }
                  }
                  
            } else {
#endif

            while (len) {
                  len--;
                  var = VAR(bptr->invars[len]);
                  if ((len ==  bptr->indepth-1) && (bptr->type != BBTYPE_STD)) {
                        if (bptr->type == BBTYPE_EXH) {
                              d = codegen_reg_of_var(0, var, REG_ITMP1);
                              M_INTMOVE(REG_ITMP1, d);
                              emit_store(jd, NULL, var, d);
                        }
                  } 
                  else {
                        assert((var->flags & INOUT));
                  }
            }
#if defined(ENABLE_LSRA)
            }
#endif
            /* walk through all instructions */
            
            len = bptr->icount;
            currentline = 0;

            for (iptr = bptr->iinstr; len > 0; len--, iptr++) {
                  if (iptr->line != currentline) {
                        linenumbertable_list_entry_add(cd, iptr->line);
                        currentline = iptr->line;
                  }

                  MCODECHECK(1024);                         /* 1KB should be enough */

            switch (iptr->opc) {
            case ICMD_NOP:        /* ...  ==> ...                                 */
            case ICMD_POP:        /* ..., value  ==> ...                          */
            case ICMD_POP2:       /* ..., value, value  ==> ...                   */
                  break;

            case ICMD_INLINE_START:

                  REPLACEMENT_POINT_INLINE_START(cd, iptr);
                  break;

            case ICMD_INLINE_BODY:

                  REPLACEMENT_POINT_INLINE_BODY(cd, iptr);
                  linenumbertable_list_entry_add_inline_start(cd, iptr);
                  linenumbertable_list_entry_add(cd, iptr->line);
                  break;

            case ICMD_INLINE_END:

                  linenumbertable_list_entry_add_inline_end(cd, iptr);
                  linenumbertable_list_entry_add(cd, iptr->line);
                  break;

            case ICMD_CHECKNULL:  /* ..., objectref  ==> ..., objectref           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_nullpointer_check(cd, iptr, s1);
                  break;

            /* constant operations ************************************************/

            case ICMD_ICONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  ICONST(d, iptr->sx.val.i);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  LCONST(d, iptr->sx.val.l);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  disp = dseg_add_float(cd, iptr->sx.val.f);
                  emit_movdl_membase_reg(cd, RIP, -((cd->mcodeptr + ((d > 7) ? 9 : 8)) - cd->mcodebase) + disp, d);
                  emit_store_dst(jd, iptr, d);
                  break;
            
            case ICMD_DCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  disp = dseg_add_double(cd, iptr->sx.val.d);
                  emit_movd_membase_reg(cd, RIP, -((cd->mcodeptr + 9) - cd->mcodebase) + disp, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ACONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        cr   = iptr->sx.val.c.ref;
                        disp = dseg_add_unique_address(cd, cr);

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_classinfo,
                                                        cr, disp);

/*                      PROFILE_CYCLE_START; */

                        M_ALD(d, RIP, disp);
                  }
                  else {
                        if (iptr->sx.val.anyptr == 0) {
                              M_CLR(d);
                        }
                        else {
                              disp = dseg_add_address(cd, iptr->sx.val.anyptr);
                              M_ALD(d, RIP, disp);
                        }
                  }
                  emit_store_dst(jd, iptr, d);
                  break;


            /* load/store/copy/move operations ************************************/

            case ICMD_ILOAD:      /* ...  ==> ..., content of local variable      */
            case ICMD_ALOAD:      /* s1 = local variable                          */
            case ICMD_LLOAD:
            case ICMD_FLOAD:  
            case ICMD_DLOAD:  
            case ICMD_ISTORE:     /* ..., value  ==> ...                          */
            case ICMD_LSTORE:
            case ICMD_FSTORE:
            case ICMD_DSTORE: 
            case ICMD_COPY:
            case ICMD_MOVE:
                  
                  emit_copy(jd, iptr);
                  break;

            case ICMD_ASTORE:
                  if (!(iptr->flags.bits & INS_FLAG_RETADDR))
                        emit_copy(jd, iptr);
                  break;

            /* integer operations *************************************************/

            case ICMD_INEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1); 
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_INEG(d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LNEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1); 
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_LNEG(d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_I2L:        /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_ISEXT(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_L2I:        /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_IMOV(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INT2BYTE:   /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_BSEXT(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INT2CHAR:   /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_CZEXT(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INT2SHORT:  /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_SSEXT(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;


            case ICMD_IADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_IADD(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_IADD(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IINC:
            case ICMD_IADDCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);

                  /* Using inc and dec is not faster than add (tested with
                     sieve). */

                  M_INTMOVE(s1, d);
                  M_IADD_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_LADD(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_LADD(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LADDCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LADD_IMM(iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LADD(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d) {
                        M_INTMOVE(s1, REG_ITMP1);
                        M_ISUB(s2, REG_ITMP1);
                        M_INTMOVE(REG_ITMP1, d);
                  } else {
                        M_INTMOVE(s1, d);
                        M_ISUB(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISUBCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_ISUB_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d) {
                        M_INTMOVE(s1, REG_ITMP1);
                        M_LSUB(s2, REG_ITMP1);
                        M_INTMOVE(REG_ITMP1, d);
                  } else {
                        M_INTMOVE(s1, d);
                        M_LSUB(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSUBCONST:  /* ..., value  ==> ..., value - constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LSUB_IMM(iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LSUB(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_IMUL(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_IMUL(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IMULCONST:  /* ..., value  ==> ..., value * constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.i == 2) {
                        M_INTMOVE(s1, d);
                        M_ISLL_IMM(1, d);
                  } else
                        M_IMUL_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_LMUL(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_LMUL(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LMULCONST:  /* ..., value  ==> ..., value * constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LMUL_IMM(s1, iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_INTMOVE(s1, d);
                        M_LMUL(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, RAX);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP3);
                  d = codegen_reg_of_dst(jd, iptr, RAX);

                  M_INTMOVE(s1, RAX);
                  M_INTMOVE(s2, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, REG_ITMP3);

                  M_MOV(RDX, REG_ITMP2);    /* save RDX (it's an argument register) */

                  M_ICMP_IMM(0x80000000, RAX);    /* check as described in jvm spec */
                  M_BNE(4 + 6);
                  M_ICMP_IMM(-1, REG_ITMP3);                             /* 4 bytes */
                  M_BEQ(1 + 3);                                          /* 6 bytes */

                  emit_cltd(cd);                                         /* 1 byte  */
                  emit_idivl_reg(cd, REG_ITMP3);                         /* 3 bytes */

                  M_INTMOVE(RAX, d);
                  emit_store_dst(jd, iptr, d);
                  dst = VAROP(iptr->dst);
                  if (IS_INMEMORY(dst->flags) || (dst->vv.regoff != RDX))
                        M_MOV(REG_ITMP2, RDX);                         /* restore RDX */
                  break;

            case ICMD_IREM:       /* ..., val1, val2  ==> ..., val1 % val2        */

                  s1 = emit_load_s1(jd, iptr, RAX);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP3);
                  d = codegen_reg_of_dst(jd, iptr, RDX);

                  M_INTMOVE(s1, RAX);
                  M_INTMOVE(s2, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, REG_ITMP3);

                  M_MOV(RDX, REG_ITMP2);    /* save RDX (it's an argument register) */

                  M_ICMP_IMM(0x80000000, RAX);    /* check as described in jvm spec */
                  M_BNE(3 + 4 + 6);
                  M_CLR(RDX);                                            /* 3 bytes */
                  M_ICMP_IMM(-1, REG_ITMP3);                             /* 4 bytes */
                  M_BEQ(1 + 3);                                          /* 6 bytes */

                  emit_cltd(cd);                                         /* 1 byte  */
                  emit_idivl_reg(cd, REG_ITMP3);                         /* 3 byte  */

                  M_INTMOVE(RDX, d);
                  emit_store_dst(jd, iptr, d);
                  dst = VAROP(iptr->dst);
                  if (IS_INMEMORY(dst->flags) || (dst->vv.regoff != RDX))
                        M_MOV(REG_ITMP2, RDX);                         /* restore RDX */
                  break;

            case ICMD_IDIVPOW2:   /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_INTMOVE(s1, REG_ITMP1);
                  emit_alul_imm_reg(cd, ALU_CMP, -1, REG_ITMP1);
                  emit_leal_membase_reg(cd, REG_ITMP1, (1 << iptr->sx.val.i) - 1, REG_ITMP2);
                  emit_cmovccl_reg_reg(cd, CC_LE, REG_ITMP2, REG_ITMP1);
                  emit_shiftl_imm_reg(cd, SHIFT_SAR, iptr->sx.val.i, REG_ITMP1);
                  emit_mov_reg_reg(cd, REG_ITMP1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IREMPOW2:   /* ..., value  ==> ..., value % constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_INTMOVE(s1, REG_ITMP1);
                  emit_alul_imm_reg(cd, ALU_CMP, -1, REG_ITMP1);
                  emit_leal_membase_reg(cd, REG_ITMP1, iptr->sx.val.i, REG_ITMP2);
                  emit_cmovccl_reg_reg(cd, CC_G, REG_ITMP1, REG_ITMP2);
                  emit_alul_imm_reg(cd, ALU_AND, -1 - (iptr->sx.val.i), REG_ITMP2);
                  emit_alul_reg_reg(cd, ALU_SUB, REG_ITMP2, REG_ITMP1);
                  emit_mov_reg_reg(cd, REG_ITMP1, d);
                  emit_store_dst(jd, iptr, d);
                  break;


            case ICMD_LDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, RAX);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP3);
                  d = codegen_reg_of_dst(jd, iptr, RAX);

                  M_INTMOVE(s1, RAX);
                  M_INTMOVE(s2, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, REG_ITMP3);

                  M_MOV(RDX, REG_ITMP2);    /* save RDX (it's an argument register) */

                  /* check as described in jvm spec */
                  disp = dseg_add_s8(cd, 0x8000000000000000LL);
                  M_LCMP_MEMBASE(RIP, -((cd->mcodeptr + 7) - cd->mcodebase) + disp, RAX);
                  M_BNE(4 + 6);
                  M_LCMP_IMM(-1, REG_ITMP3);                             /* 4 bytes */
                  M_BEQ(2 + 3);                                          /* 6 bytes */

                  emit_cqto(cd);                                         /* 2 bytes */
                  emit_idiv_reg(cd, REG_ITMP3);                          /* 3 bytes */

                  M_INTMOVE(RAX, d);
                  emit_store_dst(jd, iptr, d);
                  dst = VAROP(iptr->dst);
                  if (IS_INMEMORY(dst->flags) || (dst->vv.regoff != RDX))
                        M_MOV(REG_ITMP2, RDX);                         /* restore RDX */
                  break;

            case ICMD_LREM:       /* ..., val1, val2  ==> ..., val1 % val2        */

                  s1 = emit_load_s1(jd, iptr, RAX);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP3);
                  d = codegen_reg_of_dst(jd, iptr, RDX);

                  M_INTMOVE(s1, RAX);
                  M_INTMOVE(s2, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, REG_ITMP3);

                  M_MOV(RDX, REG_ITMP2);    /* save RDX (it's an argument register) */

                  /* check as described in jvm spec */
                  disp = dseg_add_s8(cd, 0x8000000000000000LL);
                  M_LCMP_MEMBASE(RIP, -((cd->mcodeptr + 7) - cd->mcodebase) + disp, REG_ITMP1);
                  M_BNE(3 + 4 + 6);
                  M_LXOR(RDX, RDX);                                      /* 3 bytes */
                  M_LCMP_IMM(-1, REG_ITMP3);                             /* 4 bytes */
                  M_BEQ(2 + 3);                                          /* 6 bytes */

                  emit_cqto(cd);                                         /* 2 bytes */
                  emit_idiv_reg(cd, REG_ITMP3);                          /* 3 bytes */

                  M_INTMOVE(RDX, d);
                  emit_store_dst(jd, iptr, d);
                  dst = VAROP(iptr->dst);
                  if (IS_INMEMORY(dst->flags) || (dst->vv.regoff != RDX))
                        M_MOV(REG_ITMP2, RDX);                         /* restore RDX */
                  break;

            case ICMD_LDIVPOW2:   /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_INTMOVE(s1, REG_ITMP1);
                  emit_alu_imm_reg(cd, ALU_CMP, -1, REG_ITMP1);
                  emit_lea_membase_reg(cd, REG_ITMP1, (1 << iptr->sx.val.i) - 1, REG_ITMP2);
                  emit_cmovcc_reg_reg(cd, CC_LE, REG_ITMP2, REG_ITMP1);
                  emit_shift_imm_reg(cd, SHIFT_SAR, iptr->sx.val.i, REG_ITMP1);
                  emit_mov_reg_reg(cd, REG_ITMP1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LREMPOW2:   /* ..., value  ==> ..., value % constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_INTMOVE(s1, REG_ITMP1);
                  emit_alu_imm_reg(cd, ALU_CMP, -1, REG_ITMP1);
                  emit_lea_membase_reg(cd, REG_ITMP1, iptr->sx.val.i, REG_ITMP2);
                  emit_cmovcc_reg_reg(cd, CC_G, REG_ITMP1, REG_ITMP2);
                  emit_alu_imm_reg(cd, ALU_AND, -1 - (iptr->sx.val.i), REG_ITMP2);
                  emit_alu_reg_reg(cd, ALU_SUB, REG_ITMP2, REG_ITMP1);
                  emit_mov_reg_reg(cd, REG_ITMP1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHL:       /* ..., val1, val2  ==> ..., val1 << val2       */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_ishift(jd, SHIFT_SHL, iptr);
                  break;

            case ICMD_ISHLCONST:  /* ..., value  ==> ..., value << constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_ISLL_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_ishift(jd, SHIFT_SAR, iptr);
                  break;

            case ICMD_ISHRCONST:  /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(s1, d);
                  M_ISRA_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_ishift(jd, SHIFT_SHR, iptr);
                  break;

            case ICMD_IUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(s1, d);
                  M_ISRL_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSHL:       /* ..., val1, val2  ==> ..., val1 << val2       */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_lshift(jd, SHIFT_SHL, iptr);
                  break;

        case ICMD_LSHLCONST:  /* ..., value  ==> ..., value << constant       */
                                    /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_LSLL_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_lshift(jd, SHIFT_SAR, iptr);
                  break;

            case ICMD_LSHRCONST:  /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(s1, d);
                  M_LSRA_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */

                  d = codegen_reg_of_dst(jd, iptr, REG_NULL);
                  emit_lshift(jd, SHIFT_SHR, iptr);
                  break;

            case ICMD_LUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(s1, d);
                  M_LSRL_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IAND:       /* ..., val1, val2  ==> ..., val1 & val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_IAND(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_IAND(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IANDCONST:  /* ..., value  ==> ..., value & constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_IAND_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LAND:       /* ..., val1, val2  ==> ..., val1 & val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_LAND(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_LAND(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LANDCONST:  /* ..., value  ==> ..., value & constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LAND_IMM(iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LAND(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IOR:        /* ..., val1, val2  ==> ..., val1 | val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_IOR(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_IOR(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IORCONST:   /* ..., value  ==> ..., value | constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_IOR_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LOR:        /* ..., val1, val2  ==> ..., val1 | val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_LOR(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_LOR(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LORCONST:   /* ..., value  ==> ..., value | constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LOR_IMM(iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LOR(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IXOR:       /* ..., val1, val2  ==> ..., val1 ^ val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_IXOR(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_IXOR(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IXORCONST:  /* ..., value  ==> ..., value ^ constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  M_IXOR_IMM(iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LXOR:       /* ..., val1, val2  ==> ..., val1 ^ val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s2 == d)
                        M_LXOR(s1, d);
                  else {
                        M_INTMOVE(s1, d);
                        M_LXOR(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LXORCONST:  /* ..., value  ==> ..., value ^ constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, d);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LXOR_IMM(iptr->sx.val.l, d);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LXOR(REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;


            /* floating operations ************************************************/

            case ICMD_FNEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_s4(cd, 0x80000000);
                  M_FLTMOVE(s1, d);
                  emit_movss_membase_reg(cd, RIP, -((cd->mcodeptr + 9) - cd->mcodebase) + disp, REG_FTMP2);
                  emit_xorps_reg_reg(cd, REG_FTMP2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DNEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_s8(cd, 0x8000000000000000);
                  M_FLTMOVE(s1, d);
                  emit_movd_membase_reg(cd, RIP, -((cd->mcodeptr + 9) - cd->mcodebase) + disp, REG_FTMP2);
                  emit_xorpd_reg_reg(cd, REG_FTMP2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d)
                        M_FADD(s1, d);
                  else {
                        M_FLTMOVE(s1, d);
                        M_FADD(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d)
                        M_DADD(s1, d);
                  else {
                        M_FLTMOVE(s1, d);
                        M_DADD(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d) {
                        M_FLTMOVE(s2, REG_FTMP2);
                        s2 = REG_FTMP2;
                  }
                  M_FLTMOVE(s1, d);
                  M_FSUB(s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d) {
                        M_FLTMOVE(s2, REG_FTMP2);
                        s2 = REG_FTMP2;
                  }
                  M_FLTMOVE(s1, d);
                  M_DSUB(s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d)
                        M_FMUL(s1, d);
                  else {
                        M_FLTMOVE(s1, d);
                        M_FMUL(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d)
                        M_DMUL(s1, d);
                  else {
                        M_FLTMOVE(s1, d);
                        M_DMUL(s2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d) {
                        M_FLTMOVE(s2, REG_FTMP2);
                        s2 = REG_FTMP2;
                  }
                  M_FLTMOVE(s1, d);
                  M_FDIV(s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  if (s2 == d) {
                        M_FLTMOVE(s2, REG_FTMP2);
                        s2 = REG_FTMP2;
                  }
                  M_FLTMOVE(s1, d);
                  M_DDIV(s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_I2F:       /* ..., value  ==> ..., (float) value            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  M_CVTIF(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_I2D:       /* ..., value  ==> ..., (double) value           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  M_CVTID(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_L2F:       /* ..., value  ==> ..., (float) value            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  M_CVTLF(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_L2D:       /* ..., value  ==> ..., (double) value           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  M_CVTLD(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_F2I:       /* ..., value  ==> ..., (int) value              */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_CVTFI(s1, d);
                  M_ICMP_IMM(0x80000000, d);                        /* corner cases */
                  disp = ((s1 == REG_FTMP1) ? 0 : 5) + 10 + 3 +
                        ((REG_RESULT == d) ? 0 : 3);
                  M_BNE(disp);
                  M_FLTMOVE(s1, REG_FTMP1);
                  M_MOV_IMM(asm_builtin_f2i, REG_ITMP2);
                  M_CALL(REG_ITMP2);
                  M_INTMOVE(REG_RESULT, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_D2I:       /* ..., value  ==> ..., (int) value              */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_CVTDI(s1, d);
                  M_ICMP_IMM(0x80000000, d);                        /* corner cases */
                  disp = ((s1 == REG_FTMP1) ? 0 : 5) + 10 + 3 +
                        ((REG_RESULT == d) ? 0 : 3);
                  M_BNE(disp);
                  M_FLTMOVE(s1, REG_FTMP1);
                  M_MOV_IMM(asm_builtin_d2i, REG_ITMP2);
                  M_CALL(REG_ITMP2);
                  M_INTMOVE(REG_RESULT, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_F2L:       /* ..., value  ==> ..., (long) value             */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_CVTFL(s1, d);
                  M_MOV_IMM(0x8000000000000000, REG_ITMP2);
                  M_LCMP(REG_ITMP2, d);                             /* corner cases */
                  disp = ((s1 == REG_FTMP1) ? 0 : 5) + 10 + 3 +
                        ((REG_RESULT == d) ? 0 : 3);
                  M_BNE(disp);
                  M_FLTMOVE(s1, REG_FTMP1);
                  M_MOV_IMM(asm_builtin_f2l, REG_ITMP2);
                  M_CALL(REG_ITMP2);
                  M_INTMOVE(REG_RESULT, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_D2L:       /* ..., value  ==> ..., (long) value             */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  M_CVTDL(s1, d);
                  M_MOV_IMM(0x8000000000000000, REG_ITMP2);
                  M_LCMP(REG_ITMP2, d);                             /* corner cases */
                  disp = ((s1 == REG_FTMP1) ? 0 : 5) + 10 + 3 +
                        ((REG_RESULT == d) ? 0 : 3);
                  M_BNE(disp);
                  M_FLTMOVE(s1, REG_FTMP1);
                  M_MOV_IMM(asm_builtin_d2l, REG_ITMP2);
                  M_CALL(REG_ITMP2);
                  M_INTMOVE(REG_RESULT, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_F2D:       /* ..., value  ==> ..., (double) value           */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  M_CVTFD(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_D2F:       /* ..., value  ==> ..., (float) value            */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  M_CVTDF(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
                                    /* == => 0, < => 1, > => -1 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_CLR(d);
                  M_MOV_IMM(1, REG_ITMP1);
                  M_MOV_IMM(-1, REG_ITMP2);
                  emit_ucomiss_reg_reg(cd, s1, s2);
                  M_CMOVULT(REG_ITMP1, d);
                  M_CMOVUGT(REG_ITMP2, d);
                  M_CMOVP(REG_ITMP2, d);                   /* treat unordered as GT */
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */
                                    /* == => 0, < => 1, > => -1 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_CLR(d);
                  M_MOV_IMM(1, REG_ITMP1);
                  M_MOV_IMM(-1, REG_ITMP2);
                  emit_ucomiss_reg_reg(cd, s1, s2);
                  M_CMOVULT(REG_ITMP1, d);
                  M_CMOVUGT(REG_ITMP2, d);
                  M_CMOVP(REG_ITMP1, d);                   /* treat unordered as LT */
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
                                    /* == => 0, < => 1, > => -1 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_CLR(d);
                  M_MOV_IMM(1, REG_ITMP1);
                  M_MOV_IMM(-1, REG_ITMP2);
                  emit_ucomisd_reg_reg(cd, s1, s2);
                  M_CMOVULT(REG_ITMP1, d);
                  M_CMOVUGT(REG_ITMP2, d);
                  M_CMOVP(REG_ITMP2, d);                   /* treat unordered as GT */
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */
                                    /* == => 0, < => 1, > => -1 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_CLR(d);
                  M_MOV_IMM(1, REG_ITMP1);
                  M_MOV_IMM(-1, REG_ITMP2);
                  emit_ucomisd_reg_reg(cd, s1, s2);
                  M_CMOVULT(REG_ITMP1, d);
                  M_CMOVUGT(REG_ITMP2, d);
                  M_CMOVP(REG_ITMP1, d);                   /* treat unordered as LT */
                  emit_store_dst(jd, iptr, d);
                  break;


            /* memory operations **************************************************/

            case ICMD_ARRAYLENGTH: /* ..., arrayref  ==> ..., (int) length        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  M_ILD(d, s1, OFFSET(java_array_t, size));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_BALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movsbq_memindex_reg(cd, OFFSET(java_bytearray_t, data[0]), s1, s2, 0, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_CALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movzwq_memindex_reg(cd, OFFSET(java_chararray_t, data[0]), s1, s2, 1, d);
                  emit_store_dst(jd, iptr, d);
                  break;                  

            case ICMD_SALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movswq_memindex_reg(cd, OFFSET(java_shortarray_t, data[0]), s1, s2, 1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movl_memindex_reg(cd, OFFSET(java_intarray_t, data[0]), s1, s2, 2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_mov_memindex_reg(cd, OFFSET(java_longarray_t, data[0]), s1, s2, 3, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movss_memindex_reg(cd, OFFSET(java_floatarray_t, data[0]), s1, s2, 2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movsd_memindex_reg(cd, OFFSET(java_doublearray_t, data[0]), s1, s2, 3, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_AALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_mov_memindex_reg(cd, OFFSET(java_objectarray_t, data[0]), s1, s2, 3, d);
                  emit_store_dst(jd, iptr, d);
                  break;


            case ICMD_BASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_movb_reg_memindex(cd, s3, OFFSET(java_bytearray_t, data[0]), s1, s2, 0);
                  break;

            case ICMD_CASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_movw_reg_memindex(cd, s3, OFFSET(java_chararray_t, data[0]), s1, s2, 1);
                  break;

            case ICMD_SASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_movw_reg_memindex(cd, s3, OFFSET(java_shortarray_t, data[0]), s1, s2, 1);
                  break;

            case ICMD_IASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_movl_reg_memindex(cd, s3, OFFSET(java_intarray_t, data[0]), s1, s2, 2);
                  break;

            case ICMD_LASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_mov_reg_memindex(cd, s3, OFFSET(java_longarray_t, data[0]), s1, s2, 3);
                  break;

            case ICMD_FASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_FTMP3);
                  emit_movss_reg_memindex(cd, s3, OFFSET(java_floatarray_t, data[0]), s1, s2, 2);
                  break;

            case ICMD_DASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_FTMP3);
                  emit_movsd_reg_memindex(cd, s3, OFFSET(java_doublearray_t, data[0]), s1, s2, 3);
                  break;

            case ICMD_AASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);

                  M_MOV(s1, REG_A0);
                  M_MOV(s3, REG_A1);
                  M_MOV_IMM(BUILTIN_FAST_canstore, REG_ITMP1);
                  M_CALL(REG_ITMP1);
                  emit_arraystore_check(cd, iptr);

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  emit_mov_reg_memindex(cd, s3, OFFSET(java_objectarray_t, data[0]), s1, s2, 3);
                  break;


            case ICMD_BASTORECONST: /* ..., arrayref, index  ==> ...              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movb_imm_memindex(cd, iptr->sx.s23.s3.constval, OFFSET(java_bytearray_t, data[0]), s1, s2, 0);
                  break;

            case ICMD_CASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movw_imm_memindex(cd, iptr->sx.s23.s3.constval, OFFSET(java_chararray_t, data[0]), s1, s2, 1);
                  break;

            case ICMD_SASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movw_imm_memindex(cd, iptr->sx.s23.s3.constval, OFFSET(java_shortarray_t, data[0]), s1, s2, 1);
                  break;

            case ICMD_IASTORECONST: /* ..., arrayref, index  ==> ...              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_movl_imm_memindex(cd, iptr->sx.s23.s3.constval, OFFSET(java_intarray_t, data[0]), s1, s2, 2);
                  break;

            case ICMD_LASTORECONST: /* ..., arrayref, index  ==> ...              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);

                  if (IS_IMM32(iptr->sx.s23.s3.constval)) {
                        emit_mov_imm_memindex(cd, (u4) (iptr->sx.s23.s3.constval & 0x00000000ffffffff), OFFSET(java_longarray_t, data[0]), s1, s2, 3);
                  }
                  else {
                        emit_movl_imm_memindex(cd, (u4) (iptr->sx.s23.s3.constval & 0x00000000ffffffff), OFFSET(java_longarray_t, data[0]), s1, s2, 3);
                        emit_movl_imm_memindex(cd, (u4) (iptr->sx.s23.s3.constval >> 32), OFFSET(java_longarray_t, data[0]) + 4, s1, s2, 3);
                  }
                  break;

            case ICMD_AASTORECONST: /* ..., arrayref, index  ==> ...              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  emit_mov_imm_memindex(cd, 0, OFFSET(java_objectarray_t, data[0]), s1, s2, 3);
                  break;


            case ICMD_GETSTATIC:  /* ...  ==> ..., value                          */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);

/*                      PROFILE_CYCLE_START; */
                  }
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz)) {
                              PROFILE_CYCLE_STOP;

                              patcher_add_patch_ref(jd, PATCHER_initialize_class,
                                                              fi->clazz, 0);

                              PROFILE_CYCLE_START;
                        }
                  }

                  /* This approach is much faster than moving the field
                     address inline into a register. */

                  M_ALD(REG_ITMP1, RIP, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ILD(d, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_LLD(d, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD(d, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD(d, REG_ITMP1, 0);
                        break;
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_PUTSTATIC:  /* ..., value  ==> ...                          */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);

/*                      PROFILE_CYCLE_START; */
                  }
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz)) {
                              PROFILE_CYCLE_STOP;

                              patcher_add_patch_ref(jd, PATCHER_initialize_class,
                                                              fi->clazz, 0);

                              PROFILE_CYCLE_START;
                        }
                  }

                  /* This approach is much faster than moving the field
                     address inline into a register. */

                  M_ALD(REG_ITMP1, RIP, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_IST(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_LST(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                        M_FST(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                        M_DST(s1, REG_ITMP1, 0);
                        break;
                  }
                  break;

            case ICMD_PUTSTATICCONST: /* ...  ==> ...                             */
                                      /* val = value (in current instruction)     */
                                      /* following NOP)                           */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);

/*                      PROFILE_CYCLE_START; */
                  }
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz)) {
                              PROFILE_CYCLE_STOP;

                              patcher_add_patch_ref(jd, PATCHER_initialize_class,
                                                              fi->clazz, 0);

                              PROFILE_CYCLE_START;
                        }
                  }

                  /* This approach is much faster than moving the field
                     address inline into a register. */

                  M_ALD(REG_ITMP1, RIP, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                  case TYPE_FLT:
                        M_IST_IMM(iptr->sx.s23.s2.constval, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                  case TYPE_DBL:
                        if (IS_IMM32(iptr->sx.s23.s2.constval))
                              M_LST_IMM32(iptr->sx.s23.s2.constval, REG_ITMP1, 0);
                        else {
                              M_MOV_IMM(iptr->sx.s23.s2.constval, REG_ITMP2);
                              M_LST(REG_ITMP2, REG_ITMP1, 0);
                        }
                        break;
                  }
                  break;

            case ICMD_GETFIELD:   /* ...  ==> ..., value                          */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = 0;

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);

/*                      PROFILE_CYCLE_START; */
                  }
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = fi->offset;
                  }

                  /* implicit null-pointer check */
                  switch (fieldtype) {
                  case TYPE_INT:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                        M_ILD32(d, s1, disp);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                        M_LLD32(d, s1, disp);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD32(d, s1, disp);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD32(d, s1, disp);
                        break;
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_PUTFIELD:   /* ..., objectref, value  ==> ...               */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_IFTMP); /* REG_IFTMP == REG_ITMP2 */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = 0;

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);

/*                      PROFILE_CYCLE_START; */
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = fi->offset;
                  }

                  /* implicit null-pointer check */
                  switch (fieldtype) {
                  case TYPE_INT:
                        M_IST32(s2, s1, disp);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                        M_LST32(s2, s1, disp);
                        break;
                  case TYPE_FLT:
                        M_FST32(s2, s1, disp);
                        break;
                  case TYPE_DBL:
                        M_DST32(s2, s1, disp);
                        break;
                  }
                  break;

            case ICMD_PUTFIELDCONST:  /* ..., objectref, value  ==> ...           */
                                      /* val = value (in current instruction)     */
                                      /* following NOP)                           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = 0;

/*                      PROFILE_CYCLE_STOP; */

                        patcher_add_patch_ref(jd, PATCHER_putfieldconst, uf, 0);

/*                      PROFILE_CYCLE_START; */
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = fi->offset;
                  }

                  /* implicit null-pointer check */
                  switch (fieldtype) {
                  case TYPE_INT:
                  case TYPE_FLT:
                        M_IST32_IMM(iptr->sx.s23.s2.constval, s1, disp);
                        break;
                  case TYPE_LNG:
                  case TYPE_ADR:
                  case TYPE_DBL:
                        /* XXX why no check for IS_IMM32? -- probably because of the patcher */
                        M_MOV_IMM(iptr->sx.s23.s2.constval, REG_ITMP2);
                        if (disp)  /* resolved, disp can never be 0 */
                              M_LST(REG_ITMP2, s1, disp);
                        else       /* unresolved */
                              M_LST32(REG_ITMP2, s1, disp);
                        break;
                  }
                  break;


            /* branch operations **************************************************/

            case ICMD_ATHROW:       /* ..., objectref ==> ... (, objectref)       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, REG_ITMP1_XPTR);

                  PROFILE_CYCLE_STOP;

#ifdef ENABLE_VERIFIER
                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uc = iptr->sx.s23.s2.uc;

                        patcher_add_patch_ref(jd, PATCHER_resolve_class, uc, 0);
                  }
#endif /* ENABLE_VERIFIER */

                  M_CALL_IMM(0);                            /* passing exception pc */
                  M_POP(REG_ITMP2_XPC);

                  M_MOV_IMM(asm_handle_exception, REG_ITMP3);
                  M_JMP(REG_ITMP3);
                  break;

            case ICMD_GOTO:         /* ... ==> ...                                */
            case ICMD_RET:

                  emit_br(cd, iptr->dst.block);
                  ALIGNCODENOP;
                  break;

            case ICMD_JSR:          /* ... ==> ...                                */

                  emit_br(cd, iptr->sx.s23.s3.jsrtarget.block);
                  ALIGNCODENOP;
                  break;
                  
            case ICMD_IFNULL:       /* ..., value ==> ...                         */
            case ICMD_IFNONNULL:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  M_TEST(s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IFNULL, BRANCH_OPT_NONE);
                  break;

            case ICMD_IFEQ:         /* ..., value ==> ...                         */
            case ICMD_IFLT:
            case ICMD_IFLE:
            case ICMD_IFNE:
            case ICMD_IFGT:
            case ICMD_IFGE:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  M_ICMP_IMM(iptr->sx.val.i, s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IFEQ, BRANCH_OPT_NONE);
                  break;

            case ICMD_IF_LEQ:       /* ..., value ==> ...                         */
            case ICMD_IF_LNE:
            case ICMD_IF_LLT:
            case ICMD_IF_LGE:
            case ICMD_IF_LGT:
            case ICMD_IF_LLE:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (IS_IMM32(iptr->sx.val.l))
                        M_LCMP_IMM(iptr->sx.val.l, s1);
                  else {
                        M_MOV_IMM(iptr->sx.val.l, REG_ITMP2);
                        M_LCMP(REG_ITMP2, s1);
                  }
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IF_LEQ, BRANCH_OPT_NONE);
                  break;

            case ICMD_IF_ICMPEQ:    /* ..., value, value ==> ...                  */
            case ICMD_IF_ICMPNE:
            case ICMD_IF_ICMPLT:
            case ICMD_IF_ICMPGE:
            case ICMD_IF_ICMPGT:
            case ICMD_IF_ICMPLE:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_ICMP(s2, s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IF_ICMPEQ, BRANCH_OPT_NONE);
                  break;

            case ICMD_IF_ACMPEQ:    /* ..., value, value ==> ...                  */
            case ICMD_IF_ACMPNE:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_LCMP(s2, s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IF_ACMPEQ, BRANCH_OPT_NONE);
                  break;

            case ICMD_IF_LCMPEQ:    /* ..., value, value ==> ...                  */
            case ICMD_IF_LCMPNE:
            case ICMD_IF_LCMPLT:
            case ICMD_IF_LCMPGE:
            case ICMD_IF_LCMPGT:
            case ICMD_IF_LCMPLE:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_LCMP(s2, s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IF_LCMPEQ, BRANCH_OPT_NONE);
                  break;

            case ICMD_IRETURN:      /* ..., retvalue ==> ...                      */
            case ICMD_LRETURN:

                  REPLACEMENT_POINT_RETURN(cd, iptr);
                  s1 = emit_load_s1(jd, iptr, REG_RESULT);
                  M_INTMOVE(s1, REG_RESULT);
                  goto nowperformreturn;

            case ICMD_ARETURN:      /* ..., retvalue ==> ...                      */

                  REPLACEMENT_POINT_RETURN(cd, iptr);
                  s1 = emit_load_s1(jd, iptr, REG_RESULT);
                  M_INTMOVE(s1, REG_RESULT);

#ifdef ENABLE_VERIFIER
                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uc = iptr->sx.s23.s2.uc;

                        PROFILE_CYCLE_STOP;

                        patcher_add_patch_ref(jd, PATCHER_resolve_class, uc, 0);

                        PROFILE_CYCLE_START;
                  }
#endif /* ENABLE_VERIFIER */
                  goto nowperformreturn;

            case ICMD_FRETURN:      /* ..., retvalue ==> ...                      */
            case ICMD_DRETURN:

                  REPLACEMENT_POINT_RETURN(cd, iptr);
                  s1 = emit_load_s1(jd, iptr, REG_FRESULT);
                  M_FLTMOVE(s1, REG_FRESULT);
                  goto nowperformreturn;

            case ICMD_RETURN:      /* ...  ==> ...                                */

                  REPLACEMENT_POINT_RETURN(cd, iptr);

nowperformreturn:
                  {
                  s4 i, p;

                  p = cd->stackframesize;

#if !defined(NDEBUG)
                  if (JITDATA_HAS_FLAG_VERBOSECALL(jd))
                        emit_verbosecall_exit(jd);
#endif /* !defined(NDEBUG) */

#if defined(ENABLE_THREADS)
                  if (checksync && code_is_synchronized(code)) {
                        M_ALD(REG_A0, REG_SP, rd->memuse * 8);
      
                        /* we need to save the proper return value */
                        switch (iptr->opc) {
                        case ICMD_IRETURN:
                        case ICMD_ARETURN:
                        case ICMD_LRETURN:
                              M_LST(REG_RESULT, REG_SP, rd->memuse * 8);
                              break;
                        case ICMD_FRETURN:
                        case ICMD_DRETURN:
                              M_DST(REG_FRESULT, REG_SP, rd->memuse * 8);
                              break;
                        }

                        M_MOV_IMM(LOCK_monitor_exit, REG_ITMP1);
                        M_CALL(REG_ITMP1);

                        /* and now restore the proper return value */
                        switch (iptr->opc) {
                        case ICMD_IRETURN:
                        case ICMD_ARETURN:
                        case ICMD_LRETURN:
                              M_LLD(REG_RESULT, REG_SP, rd->memuse * 8);
                              break;
                        case ICMD_FRETURN:
                        case ICMD_DRETURN:
                              M_DLD(REG_FRESULT, REG_SP, rd->memuse * 8);
                              break;
                        }
                  }
#endif

                  /* restore saved registers */

                  for (i = INT_SAV_CNT - 1; i >= rd->savintreguse; i--) {
                        p--; M_LLD(rd->savintregs[i], REG_SP, p * 8);
                  }
                  for (i = FLT_SAV_CNT - 1; i >= rd->savfltreguse; i--) {
                        p--; M_DLD(rd->savfltregs[i], REG_SP, p * 8);
                  }

                  /* deallocate stack */

                  if (cd->stackframesize)
                        M_AADD_IMM(cd->stackframesize * 8, REG_SP);

                  /* generate method profiling code */

                  PROFILE_CYCLE_STOP;

                  M_RET;
                  }
                  break;


            case ICMD_TABLESWITCH:  /* ..., index ==> ...                         */
                  {
                        s4 i, l;
                        branch_target_t *table;

                        table = iptr->dst.table;

                        l = iptr->sx.s23.s2.tablelow;
                        i = iptr->sx.s23.s3.tablehigh;

                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        M_INTMOVE(s1, REG_ITMP1);

                        if (l != 0)
                              M_ISUB_IMM(l, REG_ITMP1);

                        /* number of targets */
                        i = i - l + 1;

                /* range check */

                        M_ICMP_IMM(i - 1, REG_ITMP1);
                        emit_bugt(cd, table[0].block);

                        /* build jump table top down and use address of lowest entry */

                        table += i;

                        while (--i >= 0) {
                              dseg_add_target(cd, table->block);
                              --table;
                        }

                        /* length of dataseg after last dseg_add_target is used
                           by load */

                        M_MOV_IMM(0, REG_ITMP2);
                        dseg_adddata(cd);
                        emit_mov_memindex_reg(cd, -(cd->dseglen), REG_ITMP2, REG_ITMP1, 3, REG_ITMP1);
                        M_JMP(REG_ITMP1);
                  }
                  break;


            case ICMD_LOOKUPSWITCH: /* ..., key ==> ...                           */
                  {
                        s4 i;
                        lookup_target_t *lookup;

                        lookup = iptr->dst.lookup;

                        i = iptr->sx.s23.s2.lookupcount;
                  
                        MCODECHECK(8 + ((7 + 6) * i) + 5);
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                        while (--i >= 0) {
                              M_ICMP_IMM(lookup->value, s1);
                              emit_beq(cd, lookup->target.block);
                              lookup++;
                        }

                        emit_br(cd, iptr->sx.s23.s3.lookupdefault.block);
                        ALIGNCODENOP;
                  }
                  break;


            case ICMD_BUILTIN:      /* ..., [arg1, [arg2 ...]] ==> ...            */

                  REPLACEMENT_POINT_FORGC_BUILTIN(cd, iptr);

                  bte = iptr->sx.s23.s3.bte;
                  md  = bte->md;
                  goto gen_method;

            case ICMD_INVOKESTATIC: /* ..., [arg1, [arg2 ...]] ==> ...            */

            case ICMD_INVOKESPECIAL:/* ..., objectref, [arg1, [arg2 ...]] ==> ... */
            case ICMD_INVOKEVIRTUAL:/* op1 = arg count, val.a = method pointer    */
            case ICMD_INVOKEINTERFACE:

                  REPLACEMENT_POINT_INVOKE(cd, iptr);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        lm = NULL;
                        um = iptr->sx.s23.s3.um;
                        md = um->methodref->parseddesc.md;
                  }
                  else {
                        lm = iptr->sx.s23.s3.fmiref->p.method;
                        um = NULL;
                        md = lm->parseddesc;
                  }

gen_method:
                  s3 = md->paramcount;

                  MCODECHECK((20 * s3) + 128);

                  /* copy arguments to registers or stack location */

                  for (s3 = s3 - 1; s3 >= 0; s3--) {
                        var = VAR(iptr->sx.s23.s2.args[s3]);
                        d   = md->params[s3].regoff;

                        /* already preallocated (ARGVAR)? */

                        if (var->flags & PREALLOC)
                              continue;

                        if (IS_INT_LNG_TYPE(var->type)) {
                              if (!md->params[s3].inmemory) {
                                    s1 = emit_load(jd, iptr, var, d);
                                    M_INTMOVE(s1, d);
                              }
                              else {
                                    s1 = emit_load(jd, iptr, var, REG_ITMP1);
                                    M_LST(s1, REG_SP, d);
                              }
                        }
                        else {
                              if (!md->params[s3].inmemory) {
                                    s1 = emit_load(jd, iptr, var, d);
                                    M_FLTMOVE(s1, d);
                              }
                              else {
                                    s1 = emit_load(jd, iptr, var, REG_FTMP1);

                                    if (IS_2_WORD_TYPE(var->type))
                                          M_DST(s1, REG_SP, d);
                                    else
                                          M_FST(s1, REG_SP, d);
                              }
                        }
                  }

                  /* generate method profiling code */

                  PROFILE_CYCLE_STOP;

                  switch (iptr->opc) {
                  case ICMD_BUILTIN:
                        if (bte->stub == NULL) {
                              M_MOV_IMM(bte->fp, REG_ITMP1);
                        }
                        else {
                              M_MOV_IMM(bte->stub, REG_ITMP1);
                        }
                        M_CALL(REG_ITMP1);
                        break;

                  case ICMD_INVOKESPECIAL:
                        emit_nullpointer_check(cd, iptr, REG_A0);
                        /* fall through */

                  case ICMD_INVOKESTATIC:
                        if (lm == NULL) {
                              disp = dseg_add_unique_address(cd, um);

                              patcher_add_patch_ref(jd, PATCHER_invokestatic_special,
                                                              um, disp);
                        }
                        else {
                              disp = dseg_add_functionptr(cd, lm->stubroutine);
                        }

                        M_ALD(REG_ITMP2, RIP, disp);
                        M_CALL(REG_ITMP2);
                        break;

                  case ICMD_INVOKEVIRTUAL:
                        if (lm == NULL) {
                              patcher_add_patch_ref(jd, PATCHER_invokevirtual, um, 0);

                              s1 = 0;
                        }
                        else {
                              s1 = OFFSET(vftbl_t, table[0]) +
                                    sizeof(methodptr) * lm->vftblindex;
                        }

                        /* implicit null-pointer check */
                        M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_object_t, vftbl));
                        M_ALD32(REG_ITMP3, REG_METHODPTR, s1);
                        M_CALL(REG_ITMP3);
                        break;

                  case ICMD_INVOKEINTERFACE:
                        if (lm == NULL) {
                              patcher_add_patch_ref(jd, PATCHER_invokeinterface, um, 0);

                              s1 = 0;
                              s2 = 0;
                        }
                        else {
                              s1 = OFFSET(vftbl_t, interfacetable[0]) -
                                    sizeof(methodptr) * lm->clazz->index;

                              s2 = sizeof(methodptr) * (lm - lm->clazz->methods);
                        }

                        /* implicit null-pointer check */
                        M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_object_t, vftbl));
                        M_ALD32(REG_METHODPTR, REG_METHODPTR, s1);
                        M_ALD32(REG_ITMP3, REG_METHODPTR, s2);
                        M_CALL(REG_ITMP3);
                        break;
                  }

                  /* generate method profiling code */

                  PROFILE_CYCLE_START;

                  /* store size of call code in replacement point */

                  REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                  REPLACEMENT_POINT_FORGC_BUILTIN_RETURN(cd, iptr);

                  /* store return value */

                  switch (md->returntype.type) {
                  case TYPE_INT:
                  case TYPE_LNG:
                  case TYPE_ADR:
                        s1 = codegen_reg_of_dst(jd, iptr, REG_RESULT);
                        M_INTMOVE(REG_RESULT, s1);
                        emit_store_dst(jd, iptr, s1);
                        break;
                  case TYPE_FLT:
                  case TYPE_DBL:
                        s1 = codegen_reg_of_dst(jd, iptr, REG_FRESULT);
                        M_FLTMOVE(REG_FRESULT, s1);
                        emit_store_dst(jd, iptr, s1);
                        break;
                  default:
                        /* TYPE_VOID */
                        break;
                  }
                  break;


            case ICMD_CHECKCAST:  /* ..., objectref ==> ..., objectref            */

                  if (!(iptr->flags.bits & INS_FLAG_ARRAY)) {
                        /* object type cast-check */

                        classinfo *super;
                        s4         superindex;

                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                              super      = NULL;
                              superindex = 0;
                        }
                        else {
                              super      = iptr->sx.s23.s3.c.cls;
                              superindex = super->index;
                        }

                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                        /* if class is not resolved, check which code to call */

                        if (super == NULL) {
                              M_TEST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_1);

                              patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_flags,
                                                              iptr->sx.s23.s3.c.ref, 0);

                              M_IMOV_IMM(0, REG_ITMP2);                 /* super->flags */
                              M_IAND_IMM(ACC_INTERFACE, REG_ITMP2);
                              emit_label_beq(cd, BRANCH_LABEL_2);
                        }

                        /* interface checkcast code */

                        if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                              if (super != NULL) {
                                    M_TEST(s1);
                                    emit_label_beq(cd, BRANCH_LABEL_3);
                              }

                              M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));

                              if (super == NULL) {
                                    patcher_add_patch_ref(jd, PATCHER_checkcast_interface,
                                                                    iptr->sx.s23.s3.c.ref,
                                                                    0);
                              }

                              M_ILD32(REG_ITMP3,
                                          REG_ITMP2, OFFSET(vftbl_t, interfacetablelength));
                              M_ICMP_IMM32(superindex, REG_ITMP3);
                              emit_classcast_check(cd, iptr, BRANCH_LE, REG_ITMP3, s1);

                              M_ALD32(REG_ITMP3, REG_ITMP2, 
                                          OFFSET(vftbl_t, interfacetable[0]) -
                                          superindex * sizeof(methodptr*));
                              M_TEST(REG_ITMP3);
                              emit_classcast_check(cd, iptr, BRANCH_EQ, REG_ITMP3, s1);

                              if (super == NULL)
                                    emit_label_br(cd, BRANCH_LABEL_4);
                              else
                                    emit_label(cd, BRANCH_LABEL_3);
                        }

                        /* class checkcast code */

                        if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                              if (super == NULL) {
                                    emit_label(cd, BRANCH_LABEL_2);

                                    cr   = iptr->sx.s23.s3.c.ref;
                                    disp = dseg_add_unique_address(cd, cr);

                                    patcher_add_patch_ref(jd,
                                                                    PATCHER_resolve_classref_to_vftbl,
                                                                    cr, disp);
                              }
                              else {
                                    M_TEST(s1);
                                    emit_label_beq(cd, BRANCH_LABEL_5);

                                    disp = dseg_add_address(cd, super->vftbl);
                              }

                              M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                              M_ALD(REG_ITMP3, RIP, disp);

                              if (super == NULL || super->vftbl->subtype_depth >= DISPLAY_SIZE) {
                                    M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, subtype_offset));
                                    M_LCMP_MEMINDEX(REG_ITMP2, 0, REG_ITMP1, 0, REG_ITMP3);
                                    emit_label_beq(cd, BRANCH_LABEL_6);  /* good */

                                    if (super == NULL) {
                                          M_LCMP_IMM(OFFSET(vftbl_t, subtype_display[DISPLAY_SIZE]), REG_ITMP1);
                                          emit_label_bne(cd, BRANCH_LABEL_10);  /* throw */
                                    }

                                    M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, subtype_depth));
                                    M_ICMP_MEMBASE(REG_ITMP2, OFFSET(vftbl_t, subtype_depth), REG_ITMP1);
                                    emit_label_bgt(cd, BRANCH_LABEL_9);  /* throw */

                                    M_ALD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, subtype_overflow));
                                    M_LCMP_MEMINDEX(REG_ITMP2, -8*DISPLAY_SIZE, REG_ITMP1, 3, REG_ITMP3);
                                    emit_label_beq(cd, BRANCH_LABEL_7);  /* good */

                                    emit_label(cd, BRANCH_LABEL_9);
                                    if (super == NULL)
                                          emit_label(cd, BRANCH_LABEL_10);

                                    /* reload s1, might have been destroyed */
                                    emit_load_s1(jd, iptr, REG_ITMP1);
                                    M_ALD_MEM(s1, TRAP_ClassCastException);

                                    emit_label(cd, BRANCH_LABEL_7);
                                    emit_label(cd, BRANCH_LABEL_6);
                                    /* reload s1, might have been destroyed */
                                    emit_load_s1(jd, iptr, REG_ITMP1);
                              }
                              else {
                                    M_LCMP_MEMBASE(REG_ITMP2, super->vftbl->subtype_offset, REG_ITMP3);
                                    emit_classcast_check(cd, iptr, BRANCH_NE, REG_ITMP3, s1);
                              }

                              if (super != NULL)
                                    emit_label(cd, BRANCH_LABEL_5);
                        }

                        if (super == NULL) {
                              emit_label(cd, BRANCH_LABEL_1);
                              emit_label(cd, BRANCH_LABEL_4);
                        }

                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  }
                  else {
                        /* array type cast-check */

                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_INTMOVE(s1, REG_A0);

                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                              cr   = iptr->sx.s23.s3.c.ref;
                              disp = dseg_add_unique_address(cd, cr);

                              patcher_add_patch_ref(jd,
                                                              PATCHER_resolve_classref_to_classinfo,
                                                              cr, disp);
                        }
                        else {
                              disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);
                        }

                        M_ALD(REG_A1, RIP, disp);
                        M_MOV_IMM(BUILTIN_arraycheckcast, REG_ITMP1);
                        M_CALL(REG_ITMP1);

                        /* s1 may have been destroyed over the function call */
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_TEST(REG_RESULT);
                        emit_classcast_check(cd, iptr, BRANCH_EQ, REG_RESULT, s1);

                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  }

                  M_INTMOVE(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INSTANCEOF: /* ..., objectref ==> ..., intresult            */

                  {
                  classinfo *super;
                  s4         superindex;

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        super      = NULL;
                        superindex = 0;
                  }
                  else {
                        super      = iptr->sx.s23.s3.c.cls;
                        superindex = super->index;
                  }

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);

                  if (s1 == d) {
                        M_INTMOVE(s1, REG_ITMP1);
                        s1 = REG_ITMP1;
                  }

                  M_CLR(d);

                  /* if class is not resolved, check which code to call */

                  if (super == NULL) {
                        M_TEST(s1);
                        emit_label_beq(cd, BRANCH_LABEL_1);

                        patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_flags,
                                                        iptr->sx.s23.s3.c.ref, 0);

                        M_IMOV_IMM(0, REG_ITMP3);                     /* super->flags */
                        M_IAND_IMM(ACC_INTERFACE, REG_ITMP3);
                        emit_label_beq(cd, BRANCH_LABEL_2);
                  }

                  /* interface instanceof code */

                  if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                        if (super != NULL) {
                              M_TEST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_3);
                        }

                        M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));

                        if (super == NULL) {
                              patcher_add_patch_ref(jd, PATCHER_instanceof_interface,
                                                              iptr->sx.s23.s3.c.ref, 0);
                        }

                        M_ILD32(REG_ITMP3,
                                    REG_ITMP1, OFFSET(vftbl_t, interfacetablelength));
                        M_ICMP_IMM32(superindex, REG_ITMP3);

                        a = 3 + 4 /* mov_membase32_reg */ + 3 /* test */ + 4 /* setcc */;

                        M_BLE(a);
                        M_ALD32(REG_ITMP1, REG_ITMP1,
                                    OFFSET(vftbl_t, interfacetable[0]) -
                                    superindex * sizeof(methodptr*));
                        M_TEST(REG_ITMP1);
                        M_SETNE(d);

                        if (super == NULL)
                              emit_label_br(cd, BRANCH_LABEL_4);
                        else
                              emit_label(cd, BRANCH_LABEL_3);
                  }

                  /* class instanceof code */

                  if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                        if (super == NULL) {
                              emit_label(cd, BRANCH_LABEL_2);

                              cr   = iptr->sx.s23.s3.c.ref;
                              disp = dseg_add_unique_address(cd, cr);

                              patcher_add_patch_ref(jd,
                                                              PATCHER_resolve_classref_to_vftbl,
                                                              cr, disp);
                        }
                        else {
                              M_TEST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_5);

                              disp = dseg_add_address(cd, super->vftbl);
                        }

                        M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                        M_ALD(REG_ITMP3, RIP, disp);

                        if (super == NULL || super->vftbl->subtype_depth >= DISPLAY_SIZE) {
                              M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, subtype_offset));
                              M_LCMP_MEMINDEX(REG_ITMP2, 0, REG_ITMP1, 0, REG_ITMP3);
                              emit_label_bne(cd, BRANCH_LABEL_8); /* jump over INC/SETE */
                              if (d == REG_ITMP2) {
                                    M_SETE(d);
                                    M_BSEXT(d, d);
                              } else
                                    M_LINC(d);
                              emit_label_br(cd, BRANCH_LABEL_6);  /* true */
                              emit_label(cd, BRANCH_LABEL_8);

                              if (super == NULL) {
                                    M_LCMP_IMM(OFFSET(vftbl_t, subtype_display[DISPLAY_SIZE]), REG_ITMP1);
                                    emit_label_bne(cd, BRANCH_LABEL_10);  /* false */
                              }

                              M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, subtype_depth));
                              M_ICMP_MEMBASE(REG_ITMP2, OFFSET(vftbl_t, subtype_depth), REG_ITMP1);
                              emit_label_bgt(cd, BRANCH_LABEL_9);  /* false */

                              M_ALD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, subtype_overflow));
                              M_LCMP_MEMINDEX(REG_ITMP2, -8*DISPLAY_SIZE, REG_ITMP1, 3, REG_ITMP3);
                              M_SETE(d);
                              if (d == REG_ITMP2) {
                                    M_BSEXT(d, d);

                                    emit_label_br(cd, BRANCH_LABEL_7); /* jump over M_CLR */
                              }

                              emit_label(cd, BRANCH_LABEL_9);
                              if (super == NULL)
                                    emit_label(cd, BRANCH_LABEL_10);
                              if (d == REG_ITMP2) {
                                    M_CLR(d);

                                    emit_label(cd, BRANCH_LABEL_7);
                              }
                              emit_label(cd, BRANCH_LABEL_6);
                        }
                        else {
                              M_LCMP_MEMBASE(REG_ITMP2, super->vftbl->subtype_offset, REG_ITMP3);
                              M_SETE(d);
                              if (d == REG_ITMP2)
                                    M_BSEXT(d, d);
                        }

                        if (super != NULL)
                              emit_label(cd, BRANCH_LABEL_5);
                  }

                  if (super == NULL) {
                        emit_label(cd, BRANCH_LABEL_1);
                        emit_label(cd, BRANCH_LABEL_4);
                  }

                  emit_store_dst(jd, iptr, d);
                  }
                  break;

            case ICMD_MULTIANEWARRAY:/* ..., cnt1, [cnt2, ...] ==> ..., arrayref  */

                  /* check for negative sizes and copy sizes to stack if necessary  */

                  MCODECHECK((10 * 4 * iptr->s1.argcount) + 5 + 10 * 8);

                  for (s1 = iptr->s1.argcount; --s1 >= 0; ) {

                        /* copy SAVEDVAR sizes to stack */
                        var = VAR(iptr->sx.s23.s2.args[s1]);

                        /* Already Preallocated? */
                        if (!(var->flags & PREALLOC)) {
                              s2 = emit_load(jd, iptr, var, REG_ITMP1);
                              M_LST(s2, REG_SP, s1 * 8);
                        }
                  }

                  /* a0 = dimension count */

                  M_MOV_IMM(iptr->s1.argcount, REG_A0);

                  /* is a patcher function set? */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        cr   = iptr->sx.s23.s3.c.ref;
                        disp = dseg_add_unique_address(cd, cr);

                        patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_classinfo,
                                                        cr, disp);
                  }
                  else {
                        disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);
                  }

                  /* a1 = classinfo */

                  M_ALD(REG_A1, RIP, disp);

                  /* a2 = pointer to dimensions = stack pointer */

                  M_MOV(REG_SP, REG_A2);

                  M_MOV_IMM(BUILTIN_multianewarray, REG_ITMP1);
                  M_CALL(REG_ITMP1);

                  /* check for exception before result assignment */

                  emit_exception_check(cd, iptr);

                  s1 = codegen_reg_of_dst(jd, iptr, REG_RESULT);
                  M_INTMOVE(REG_RESULT, s1);
                  emit_store_dst(jd, iptr, s1);
                  break;

            default:
                  exceptions_throw_internalerror("Unknown ICMD %d during code generation",
                                                               iptr->opc);
                  return false;
      } /* switch */

      } /* for instruction */
            
      MCODECHECK(512); /* XXX require a lower number? */

      /* At the end of a basic block we may have to append some nops,
         because the patcher stub calling code might be longer than the
         actual instruction. So codepatching does not change the
         following block unintentionally. */

      if (cd->mcodeptr < cd->lastmcodeptr) {
            while (cd->mcodeptr < cd->lastmcodeptr) {
                  M_NOP;
            }
      }

      } /* if (bptr -> flags >= BBREACHED) */
      } /* for basic block */

      /* Generate patcher traps. */

      emit_patcher_traps(jd);

      /* everything's ok */

      return true;
}


/* codegen_emit_stub_native ****************************************************

   Emits a stub routine which calls a native method.

*******************************************************************************/

void codegen_emit_stub_native(jitdata *jd, methoddesc *nmd, functionptr f, int skipparams)
{
      methodinfo  *m;
      codeinfo    *code;
      codegendata *cd;
      methoddesc  *md;
      int          i, j;
      int          s1, s2;
      int          disp;

      /* Sanity check. */

      assert(f != NULL);

      /* Get required compiler data. */

      m    = jd->m;
      code = jd->code;
      cd   = jd->cd;

      /* initialize variables */

      md = m->parseddesc;

      /* calculate stack frame size */

      cd->stackframesize =
            sizeof(stackframeinfo_t) / SIZEOF_VOID_P +
            sizeof(localref_table) / SIZEOF_VOID_P +
            md->paramcount +
            (md->returntype.type == TYPE_VOID ? 0 : 1) +
            nmd->memuse;

      ALIGN_ODD(cd->stackframesize);              /* keep stack 16-byte aligned */

      /* create method header */

      (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
      (void) dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */
      (void) dseg_add_unique_s4(cd, 0);                      /* IsLeaf          */
      (void) dseg_add_unique_s4(cd, 0);                      /* IntSave         */
      (void) dseg_add_unique_s4(cd, 0);                      /* FltSave         */

#if defined(ENABLE_PROFILING)
      /* generate native method profiling code */

      if (JITDATA_HAS_FLAG_INSTRUMENT(jd)) {
            /* count frequency */

            M_MOV_IMM(code, REG_ITMP3);
            M_IINC_MEMBASE(REG_ITMP3, OFFSET(codeinfo, frequency));
      }
#endif

      /* generate stub code */

      M_ASUB_IMM(cd->stackframesize * 8, REG_SP);

#if defined(ENABLE_GC_CACAO)
      /* Save callee saved integer registers in stackframeinfo (GC may
         need to recover them during a collection). */

      disp = cd->stackframesize * 8 - sizeof(stackframeinfo_t) +
            OFFSET(stackframeinfo_t, intregs);

      for (i = 0; i < INT_SAV_CNT; i++)
            M_AST(abi_registers_integer_saved[i], REG_SP, disp + i * 8);
#endif

      /* save integer and float argument registers */

      for (i = 0; i < md->paramcount; i++) {
            if (!md->params[i].inmemory) {
                  s1 = md->params[i].regoff;

                  switch (md->paramtypes[i].type) {
                  case TYPE_INT:
                  case TYPE_LNG:
                  case TYPE_ADR:
                        M_LST(s1, REG_SP, i * 8);
                        break;
                  case TYPE_FLT:
                  case TYPE_DBL:
                        M_DST(s1, REG_SP, i * 8);
                        break;
                  }
            }
      }

      /* create dynamic stack info */

      M_MOV(REG_SP, REG_A0);
      emit_lea_membase_reg(cd, RIP, -((cd->mcodeptr + 7) - cd->mcodebase), REG_A1);
      M_MOV_IMM(codegen_start_native_call, REG_ITMP1);
      M_CALL(REG_ITMP1);

      /* remember class argument */

      if (m->flags & ACC_STATIC)
            M_MOV(REG_RESULT, REG_ITMP2);

      /* restore integer and float argument registers */

      for (i = 0; i < md->paramcount; i++) {
            if (!md->params[i].inmemory) {
                  s1 = md->params[i].regoff;

                  switch (md->paramtypes[i].type) {
                  case TYPE_INT:
                  case TYPE_LNG:
                  case TYPE_ADR:
                        M_LLD(s1, REG_SP, i * 8);
                        break;
                  case TYPE_FLT:
                  case TYPE_DBL:
                        M_DLD(s1, REG_SP, i * 8);
                        break;
                  }
            }
      }

      /* Copy or spill arguments to new locations. */

      for (i = md->paramcount - 1, j = i + skipparams; i >= 0; i--, j--) {
            s2 = nmd->params[j].regoff;

            switch (md->paramtypes[i].type) {
            case TYPE_INT:
            case TYPE_LNG:
            case TYPE_ADR:
                  if (!md->params[i].inmemory) {
                        s1 = md->params[i].regoff;

                        if (!nmd->params[j].inmemory)
                              M_INTMOVE(s1, s2);
                        else
                              M_LST(s1, REG_SP, s2);
                  }
                  else {
                        s1 = md->params[i].regoff + cd->stackframesize * 8 + 8;/* +1 (RA) */
                        M_LLD(REG_ITMP1, REG_SP, s1);
                        M_LST(REG_ITMP1, REG_SP, s2);
                  }
                  break;
            case TYPE_FLT:
                  /* We only copy spilled float arguments, as the float
                     argument registers keep unchanged. */

                  if (md->params[i].inmemory) {
                        s1 = md->params[i].regoff + cd->stackframesize * 8 + 8;/* +1 (RA) */

                        M_FLD(REG_FTMP1, REG_SP, s1);
                        M_FST(REG_FTMP1, REG_SP, s2);
                  }
                  break;
            case TYPE_DBL:
                  if (md->params[i].inmemory) {
                        s1 = md->params[i].regoff + cd->stackframesize * 8 + 8;/* +1 (RA) */
                        M_DLD(REG_FTMP1, REG_SP, s1);
                        M_DST(REG_FTMP1, REG_SP, s2);
                  }
                  break;
            }
      }

      /* Handle native Java methods. */

      if (m->flags & ACC_NATIVE) {
            /* put class into second argument register */

            if (m->flags & ACC_STATIC)
                  M_MOV(REG_ITMP2, REG_A1);

            /* put env into first argument register */

            M_MOV_IMM(_Jv_env, REG_A0);
      }

      /* Call the native function. */

      disp = dseg_add_functionptr(cd, f);
      M_ALD(REG_ITMP1, RIP, disp);
      M_CALL(REG_ITMP1);

      /* save return value */

      switch (md->returntype.type) {
      case TYPE_INT:
      case TYPE_LNG:
      case TYPE_ADR:
            switch (md->returntype.decltype) {
            case PRIMITIVETYPE_BOOLEAN:
                  M_BZEXT(REG_RESULT, REG_RESULT);
                  break;
            case PRIMITIVETYPE_BYTE:
                  M_BSEXT(REG_RESULT, REG_RESULT);
                  break;
            case PRIMITIVETYPE_CHAR:
                  M_CZEXT(REG_RESULT, REG_RESULT);
                  break;
            case PRIMITIVETYPE_SHORT:
                  M_SSEXT(REG_RESULT, REG_RESULT);
                  break;
            }
            M_LST(REG_RESULT, REG_SP, 0 * 8);
            break;
      case TYPE_FLT:
      case TYPE_DBL:
            M_DST(REG_FRESULT, REG_SP, 0 * 8);
            break;
      case TYPE_VOID:
            break;
      }

      /* remove native stackframe info */

      M_MOV(REG_SP, REG_A0);
      emit_lea_membase_reg(cd, RIP, -((cd->mcodeptr + 7) - cd->mcodebase), REG_A1);
      M_MOV_IMM(codegen_finish_native_call, REG_ITMP1);
      M_CALL(REG_ITMP1);
      M_MOV(REG_RESULT, REG_ITMP3);

      /* restore return value */

      switch (md->returntype.type) {
      case TYPE_INT:
      case TYPE_LNG:
      case TYPE_ADR:
            M_LLD(REG_RESULT, REG_SP, 0 * 8);
            break;
      case TYPE_FLT:
      case TYPE_DBL:
            M_DLD(REG_FRESULT, REG_SP, 0 * 8);
            break;
      case TYPE_VOID:
            break;
      }

#if defined(ENABLE_GC_CACAO)
      /* Restore callee saved integer registers from stackframeinfo (GC
         might have modified them during a collection). */
        
      disp = cd->stackframesize * 8 - sizeof(stackframeinfo_t) +
            OFFSET(stackframeinfo_t, intregs);

      for (i = 0; i < INT_SAV_CNT; i++)
            M_ALD(abi_registers_integer_saved[i], REG_SP, disp + i * 8);
#endif

      /* remove stackframe */

      M_AADD_IMM(cd->stackframesize * 8, REG_SP);

      /* test for exception */

      M_TEST(REG_ITMP3);
      M_BNE(1);
      M_RET;

      /* handle exception */

      M_MOV(REG_ITMP3, REG_ITMP1_XPTR);
      M_ALD(REG_ITMP2_XPC, REG_SP, 0 * 8);     /* get return address from stack */
      M_ASUB_IMM(3, REG_ITMP2_XPC);                                    /* callq */

      M_MOV_IMM(asm_handle_nat_exception, REG_ITMP3);
      M_JMP(REG_ITMP3);
}


/*
 * These are local overrides for various environment variables in Emacs.
 * Please do not remove this and leave it at the end of the file, where
 * Emacs will automagically detect them.
 * ---------------------------------------------------------------------
 * Local variables:
 * mode: c
 * indent-tabs-mode: t
 * c-basic-offset: 4
 * tab-width: 4
 * End:
 * vim:noexpandtab:sw=4:ts=4:
 */

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