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codegen.c

/* src/vm/jit/powerpc/codegen.c - machine code generator for 32-bit PowerPC

   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 <signal.h>

#include "vm/types.h"

#include "md-abi.h"

#include "vm/jit/powerpc/arch.h"
#include "vm/jit/powerpc/codegen.h"

#include "mm/memory.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/stringlocal.h"
#include "vm/vm.h"

#include "vm/jit/abi.h"
#include "vm/jit/abi-asm.h"
#include "vm/jit/asmpart.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"


/* codegen *********************************************************************

   Generates machine code.

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

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

      /* get required compiler data */

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

      /* prevent compiler warnings */

      d         = 0;
      fieldtype = 0;
      lm        = NULL;
      um        = NULL;
      uf        = 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 and Return Values to
         survive monitor_exit. The stack position for the argument can
         not be shared with place to save the return register on PPC,
         since both values reside in R3. */

      if (checksync && code_is_synchronized(code))
            cd->stackframesize += 2;
#endif

      /* create method header */

      /* align stack to 16-bytes */

      if (!code_is_leafmethod(code) || JITDATA_HAS_FLAG_VERBOSECALL(jd))
            ALIGN_2(cd->stackframesize);

      else if (code_is_leafmethod(code) && (cd->stackframesize == LA_SIZE_IN_POINTERS))
            cd->stackframesize = 0;

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

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

      /* REMOVEME: We still need it for exception handling in assembler. */

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

      (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_ALD(REG_ITMP1, REG_PV, CodeinfoPointer);
            M_ALD(REG_ITMP2, REG_ITMP1, OFFSET(codeinfo, frequency));
            M_IADD_IMM(REG_ITMP2, 1, REG_ITMP2);
            M_AST(REG_ITMP2, REG_ITMP1, OFFSET(codeinfo, frequency));

/*          PROFILE_CYCLE_START; */
      }
#endif

      /* create stack frame (if necessary) */

      if (!code_is_leafmethod(code)) {
            M_MFLR(REG_ZERO);
            M_AST(REG_ZERO, REG_SP, LA_LR_OFFSET);
      }

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

      /* save return address and used callee saved registers */

      p = cd->stackframesize;
      for (i = INT_SAV_CNT - 1; i >= rd->savintreguse; i--) {
            p--; M_IST(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)) {
                  if (!md->params[p].inmemory) {
                        if (!IS_INMEMORY(var->flags)) {
                              if (IS_2_WORD_TYPE(t))
                                    M_LNGMOVE(s1, var->vv.regoff);
                              else
                                    M_INTMOVE(s1, var->vv.regoff);
                        }
                        else {
                              if (IS_2_WORD_TYPE(t))
                                    M_LST(s1, REG_SP, var->vv.regoff);
                              else
                                    M_IST(s1, REG_SP, var->vv.regoff);
                        }
                  }
                  else {
                        if (!IS_INMEMORY(var->flags)) {
                              if (IS_2_WORD_TYPE(t))
                                    M_LLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
                              else
                                    M_ILD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
                        }
                        else {
#if 1
                              M_ILD(REG_ITMP1, REG_SP, cd->stackframesize * 8 + s1);
                              M_IST(REG_ITMP1, REG_SP, var->vv.regoff);
                              if (IS_2_WORD_TYPE(t)) {
                                    M_ILD(REG_ITMP1, REG_SP, cd->stackframesize * 8 + s1 + 4);
                                    M_IST(REG_ITMP1, REG_SP, var->vv.regoff + 4);
                              }
#else
                              /* Reuse Memory Position on Caller Stack */
                              var->vv.regoff = cd->stackframesize * 8 + s1;
#endif
                        }
                  }
            }
            else {
                  if (!md->params[p].inmemory) {
                        if (!IS_INMEMORY(var->flags))
                              M_FLTMOVE(s1, var->vv.regoff);
                        else
                              M_DST(s1, REG_SP, var->vv.regoff);
                  }
                  else {
                        if (!IS_INMEMORY(var->flags))
                              M_DLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
                        else {
#if 1
                              M_DLD(REG_FTMP1, REG_SP, cd->stackframesize * 8 + s1);
                              M_DST(REG_FTMP1, REG_SP, var->vv.regoff);
#else
                              /* Reuse Memory Position on Caller Stack */
                              var->vv.regoff = cd->stackframesize * 8 + s1;
#endif
                        }
                  }
            }
      }

#if defined(ENABLE_THREADS)
      /* call monitorenter function */

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

            s1 = rd->memuse;

# if !defined(NDEBUG)
            if (JITDATA_HAS_FLAG_VERBOSECALL(jd)) {
                  M_AADD_IMM(REG_SP, -((LA_SIZE_IN_POINTERS + ARG_CNT) * 8), REG_SP);

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

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

                  s1 += LA_SIZE_IN_POINTERS + ARG_CNT;
            }
# endif

            disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
            M_ALD(REG_ITMP3, REG_PV, disp);
            M_MTCTR(REG_ITMP3);

            /* get or test the lock object */

            if (m->flags & ACC_STATIC) {
                  disp = dseg_add_address(cd, &m->clazz->object.header);
                  M_ALD(REG_A0, REG_PV, disp);
            }
            else {
                  M_TST(REG_A0);
                  M_BNE(1);
                  M_ALD_INTERN(REG_ZERO, REG_ZERO, TRAP_NullPointerException);
            }

            M_AST(REG_A0, REG_SP, s1 * 8);
            M_JSR;

# if !defined(NDEBUG)
            if (JITDATA_HAS_FLAG_VERBOSECALL(jd)) {
                  for (p = 0; p < INT_ARG_CNT; p++)
                        M_ILD(abi_registers_integer_argument[p], REG_SP, LA_SIZE + p * 8);

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

                  M_AADD_IMM(REG_SP, (LA_SIZE_IN_POINTERS + ARG_CNT) * 8, REG_SP);
            }
# endif
      }
#endif /* defined(ENABLE_THREADS) */

      /* call trace function */

      emit_verbosecall_enter(jd);
      }

      /* 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 = (s4) (cd->mcodeptr - cd->mcodebase);

            if (bptr->flags >= BBREACHED) {
            /* branch resolving */

            codegen_resolve_branchrefs(cd, bptr);

            /* handle replacement points */

            REPLACEMENT_POINT_BLOCK_START(cd, bptr);

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

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

                  disp = dseg_add_address(cd, code->bbfrequency);
                  M_ALD(REG_ITMP2, REG_PV, disp);
                  M_ALD(REG_ITMP3, REG_ITMP2, bptr->nr * 4);
                  M_IADD_IMM(REG_ITMP3, 1, REG_ITMP3);
                  M_AST(REG_ITMP3, REG_ITMP2, bptr->nr * 4);

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

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

            /* copy interface registers to their destination */

            len = bptr->indepth;
            MCODECHECK(64+len);

#if defined(ENABLE_LSRA)
            if (opt_lsra) {
                  while (src != NULL) {
                        len--;
                        if ((len == bptr->indepth-1) && (bptr->type == BBTYPE_EXH)) {
                              /* d = reg_of_var(m, 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);
                        }
                        src = src->prev;
                  }
            } else {
#endif
            while (len > 0) {
                  len--;
                  var = VAR(bptr->invars[len]);
                  if ((len == bptr->indepth-1) && (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(64);   /* an instruction usually needs < 64 words      */

            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_ITMP12_PACKED);
                  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);
                  M_FLD(d, REG_PV, disp);
                  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);
                  M_DLD(d, REG_PV, disp);
                  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)) {
                        constant_classref *cr = iptr->sx.val.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.val.anyptr);

                  M_ALD(d, REG_PV, 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_ITMP2);
                  M_NEG(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_SUBFIC(GET_LOW_REG(s1), 0, GET_LOW_REG(d));
                  M_SUBFZE(GET_HIGH_REG(s1), GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_INTMOVE(s1, GET_LOW_REG(d));
                  M_SRA_IMM(GET_LOW_REG(d), 31, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(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_ITMP2);
                  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_ITMP2);
                  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_ITMP2);
                  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);
                  M_IADD(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

                                  /* s1.localindex = variable, sx.val.i = constant*/

            case ICMD_IINC:
            case ICMD_IADDCONST:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767)) {
                        M_IADD_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_IADD(s1, REG_ITMP2, d);
                  }
                  /* XXX the old code for ICMD_IINC was as follows:
                  {
                        u4 m = iptr->sx.val.i;
                        if (m & 0x8000)
                              m += 65536;
                        if (m & 0xffff0000)
                              M_ADDIS(s1, m >> 16, d);
                        if (m & 0xffff)
                              M_IADD_IMM(s1, m & 0xffff, d);
                  }
                  */
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_ADDC(s1, s2, GET_LOW_REG(d));
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP3);/* don't use REG_ITMP2*/
                  M_ADDE(s1, s2, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s3 = iptr->sx.val.l & 0xffffffff;
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  if ((s3 >= -32768) && (s3 <= 32767))
                        M_ADDIC(s1, s3, GET_LOW_REG(d));
                  else {
                        ICONST(REG_ITMP2, s3);
                        M_ADDC(s1, REG_ITMP2, GET_LOW_REG(d));
                  }
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s3 = iptr->sx.val.l >> 32;
                  if (s3 == -1)
                        M_ADDME(s1, GET_HIGH_REG(d));
                  else if (s3 == 0)
                        M_ADDZE(s1, GET_HIGH_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);                 /* don't use REG_ITMP2 */
                        M_ADDE(s1, REG_ITMP3, GET_HIGH_REG(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);
                  M_ISUB(s1, 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_ITMP2);
                  if ((iptr->sx.val.i >= -32767) && (iptr->sx.val.i <= 32768))
                        M_IADD_IMM(s1, -iptr->sx.val.i, d);
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_ISUB(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_SUBC(s1, s2, GET_LOW_REG(d));
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP3);/* don't use REG_ITMP2*/
                  M_SUBE(s1, s2, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s3 = (-iptr->sx.val.l) & 0xffffffff;
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  if ((s3 >= -32768) && (s3 <= 32767)) {
                        M_ADDIC(s1, s3, GET_LOW_REG(d));
                  } else {
                        ICONST(REG_ITMP2, s3);
                        M_ADDC(s1, REG_ITMP2, GET_LOW_REG(d));
                  }
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s3 = (-iptr->sx.val.l) >> 32;
                  if (s3 == -1)
                        M_ADDME(s1, GET_HIGH_REG(d));
                  else if (s3 == 0)
                        M_ADDZE(s1, GET_HIGH_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);                 /* don't use REG_ITMP2 */
                        M_ADDE(s1, REG_ITMP3, GET_HIGH_REG(d));
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IDIV:       /* ..., 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_ITMP1);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_LDAH(REG_ITMP3, REG_ZERO, 0x8000);
                  M_CMP(REG_ITMP3, s1);
                  M_BNE(3 + (s1 != d));
                  M_CMPI(s2, -1);
                  M_BNE(1 + (s1 != d));
                  M_INTMOVE(s1, d);
                  M_BR(1);
                  M_IDIV(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IREM:       /* ..., 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);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_LDAH(REG_ITMP3, REG_ZERO, 0x8000);
                  M_CMP(REG_ITMP3, s1);
                  M_BNE(4);
                  M_CMPI(s2, -1);
                  M_BNE(2);
                  M_CLR(d);
                  M_BR(3);
                  M_IDIV(s1, s2, REG_ITMP3);
                  M_IMUL(REG_ITMP3, s2, REG_ITMP3);
                  M_ISUB(s1, REG_ITMP3, d);
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1(jd, iptr, REG_A0_A1_PACKED);
                  s2 = emit_load_s2(jd, iptr, REG_A2_A3_PACKED);

                  /* XXX TODO: only do this if arithmetic check is really done! */
                  M_IOR_TST(GET_HIGH_REG(s2), GET_LOW_REG(s2), REG_ITMP3);
                  /* XXX could be optimized */
                  emit_arithmetic_check(cd, iptr, REG_ITMP3);

                  bte = iptr->sx.s23.s3.bte;
                  disp = dseg_add_functionptr(cd, bte->fp);
                  M_ALD(REG_ITMP3, REG_PV, disp);
                  M_MTCTR(REG_ITMP3);

                  M_LNGMOVE(s1, REG_A0_A1_PACKED);
                  M_LNGMOVE(s2, REG_A2_A3_PACKED);

                  M_JSR;

                  d = codegen_reg_of_dst(jd, iptr, REG_RESULT_PACKED);
                  M_LNGMOVE(REG_RESULT_PACKED, 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);
                  M_IMUL(s1, 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_ITMP2);
                  if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767))
                        M_IMUL_IMM(s1, iptr->sx.val.i, d);
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.i);
                        M_IMUL(s1, REG_ITMP3, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IDIVPOW2:   /* ..., value  ==> ..., value << constant       */
                                  
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_SRA_IMM(s1, iptr->sx.val.i, d);
                  M_ADDZE(d, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHL:       /* ..., 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);
                  M_IAND_IMM(s2, 0x1f, REG_ITMP3);
                  M_SLL(s1, REG_ITMP3, d);
                  emit_store_dst(jd, iptr, d);
                  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_ITMP2);
                  M_SLL_IMM(s1, iptr->sx.val.i & 0x1f, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHR:       /* ..., 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);
                  M_IAND_IMM(s2, 0x1f, REG_ITMP3);
                  M_SRA(s1, REG_ITMP3, d);
                  emit_store_dst(jd, iptr, d);
                  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_SRA_IMM(s1, iptr->sx.val.i & 0x1f, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IUSHR:      /* ..., 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);
                  M_IAND_IMM(s2, 0x1f, REG_ITMP2);
                  M_SRL(s1, REG_ITMP2, d);
                  emit_store_dst(jd, iptr, d);
                  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);
                  if (iptr->sx.val.i & 0x1f)
                        M_SRL_IMM(s1, iptr->sx.val.i & 0x1f, d);
                  else {
                        M_INTMOVE(s1, 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);
                  M_IAND(s1, 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_ITMP2);
                  if ((iptr->sx.val.i >= 0) && (iptr->sx.val.i <= 65535))
                        M_IAND_IMM(s1, iptr->sx.val.i, d);
                  /*
                  else if (iptr->sx.val.i == 0xffffff) {
                        M_RLWINM(s1, 0, 8, 31, d);
                        }
                  */
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.i);
                        M_IAND(s1, REG_ITMP3, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_IAND(s1, s2, GET_LOW_REG(d));
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP3);/* don't use REG_ITMP2*/
                  M_IAND(s1, s2, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s3 = iptr->sx.val.l & 0xffffffff;
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_IAND_IMM(s1, s3, GET_LOW_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);
                        M_IAND(s1, REG_ITMP3, GET_LOW_REG(d));
                  }
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s3 = iptr->sx.val.l >> 32;
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_IAND_IMM(s1, s3, GET_HIGH_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);                 /* don't use REG_ITMP2 */
                        M_IAND(s1, REG_ITMP3, GET_HIGH_REG(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_ITMP2);
                  M_MOV(s1, REG_ITMP2);
                  M_CMPI(s1, 0);
                  M_BGE(1 + 2*(iptr->sx.val.i >= 32768));
                  if (iptr->sx.val.i >= 32768) {
                        M_ADDIS(REG_ZERO, iptr->sx.val.i >> 16, REG_ITMP2);
                        M_IOR_IMM(REG_ITMP2, iptr->sx.val.i, REG_ITMP2);
                        M_IADD(s1, REG_ITMP2, REG_ITMP2);
                  }
                  else {
                        M_IADD_IMM(s1, iptr->sx.val.i, REG_ITMP2);
                  }
                  {
                        int b=0, m = iptr->sx.val.i;
                        while (m >>= 1)
                              ++b;
                        M_RLWINM(REG_ITMP2, 0, 0, 30-b, REG_ITMP2);
                  }
                  M_ISUB(s1, 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);
                  M_IOR(s1, 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_ITMP2);
                  if ((iptr->sx.val.i >= 0) && (iptr->sx.val.i <= 65535))
                        M_IOR_IMM(s1, iptr->sx.val.i, d);
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.i);
                        M_IOR(s1, REG_ITMP3, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_IOR(s1, s2, GET_LOW_REG(d));
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP3);/* don't use REG_ITMP2*/
                  M_IOR(s1, s2, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s3 = iptr->sx.val.l & 0xffffffff;
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_IOR_IMM(s1, s3, GET_LOW_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);
                        M_IOR(s1, REG_ITMP3, GET_LOW_REG(d));
                  }
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s3 = iptr->sx.val.l >> 32;
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_IOR_IMM(s1, s3, GET_HIGH_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);                 /* don't use REG_ITMP2 */
                        M_IOR(s1, REG_ITMP3, GET_HIGH_REG(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);
                  M_XOR(s1, 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_ITMP2);
                  if ((iptr->sx.val.i >= 0) && (iptr->sx.val.i <= 65535))
                        M_XOR_IMM(s1, iptr->sx.val.i, d);
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.i);
                        M_XOR(s1, REG_ITMP3, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  M_XOR(s1, s2, GET_LOW_REG(d));
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP3);/* don't use REG_ITMP2*/
                  M_XOR(s1, s2, GET_HIGH_REG(d));
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  s3 = iptr->sx.val.l & 0xffffffff;
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_XOR_IMM(s1, s3, GET_LOW_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);
                        M_XOR(s1, REG_ITMP3, GET_LOW_REG(d));
                  }
                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s3 = iptr->sx.val.l >> 32;
                  if ((s3 >= 0) && (s3 <= 65535))
                        M_XOR_IMM(s1, s3, GET_HIGH_REG(d));
                  else {
                        ICONST(REG_ITMP3, s3);                 /* don't use REG_ITMP2 */
                        M_XOR(s1, REG_ITMP3, GET_HIGH_REG(d));
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LCMP:       /* ..., val1, val2  ==> ..., val1 cmp val2      */

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP3);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  vm_abort("codegen: implement ICMD_LCMP!");
                  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);
                  M_FMOVN(s1, 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);
                  M_FMOVN(s1, 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);
                  M_FADD(s1, 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);
                  M_DADD(s1, 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);
                  M_FSUB(s1, 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);
                  M_DSUB(s1, 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);
                  M_FMUL(s1, 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);
                  M_DMUL(s1, 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);
                  M_FDIV(s1, 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);
                  M_DDIV(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;
            
            case ICMD_F2I:       /* ..., value  ==> ..., (int) value              */
            case ICMD_D2I:

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_CLR(d);
                  disp = dseg_add_float(cd, 0.0);
                  M_FLD(REG_FTMP2, REG_PV, disp);
                  M_FCMPU(s1, REG_FTMP2);
                  M_BNAN(4);
                  disp = dseg_add_unique_s4(cd, 0);
                  M_CVTDL_C(s1, REG_FTMP1);
                  M_LDA(REG_ITMP1, REG_PV, disp);
                  M_STFIWX(REG_FTMP1, 0, REG_ITMP1);
                  M_ILD(d, REG_PV, disp);
                  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_FLTMOVE(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                              
            case ICMD_D2F:       /* ..., value  ==> ..., (double) 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 fcmpg val2    */
            case ICMD_DCMPL:      /* == => 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_ITMP1);
                  M_FCMPU(s2, s1);
                  M_IADD_IMM(REG_ZERO, -1, d);
                  M_BNAN(4);
                  M_BGT(3);
                  M_IADD_IMM(REG_ZERO, 0, d);
                  M_BGE(1);
                  M_IADD_IMM(REG_ZERO, 1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
            case ICMD_DCMPG:      /* == => 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_ITMP1);
                  M_FCMPU(s1, s2);
                  M_IADD_IMM(REG_ZERO, 1, d);
                  M_BNAN(4);
                  M_BGT(3);
                  M_IADD_IMM(REG_ZERO, 0, d);
                  M_BGE(1);
                  M_IADD_IMM(REG_ZERO, -1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  

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

            case ICMD_ARRAYLENGTH: /* ..., arrayref  ==> ..., length              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* 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_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_IADD_IMM(s2, OFFSET(java_bytearray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LBZX(d, s1, REG_ITMP2);
                  M_BSEXT(d, 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_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 1, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_chararray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LHZX(d, s1, REG_ITMP2);
                  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_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 1, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_shortarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LHAX(d, s1, REG_ITMP2);
                  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_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 2, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_intarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LWZX(d, s1, REG_ITMP2);
                  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_ITMP12_PACKED);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 3, REG_ITMP2);
                  M_IADD(s1, REG_ITMP2, REG_ITMP2);
                  M_LLD_INTERN(d, REG_ITMP2, OFFSET(java_longarray_t, data[0]));
                  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_FTMP1);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 2, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_floatarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LFSX(d, s1, REG_ITMP2);
                  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_FTMP1);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 3, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_doublearray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LFDX(d, s1, REG_ITMP2);
                  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_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_SLL_IMM(s2, 2, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_objectarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_LWZX(d, s1, REG_ITMP2);
                  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);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  M_IADD_IMM(s2, OFFSET(java_bytearray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_STBX(s3, s1, REG_ITMP2);
                  break;

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

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

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

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

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

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

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

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3_high(jd, iptr, REG_ITMP3);
                  M_SLL_IMM(s2, 3, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_longarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_STWX(s3, s1, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, 4, REG_ITMP2);
                  s3 = emit_load_s3_low(jd, iptr, REG_ITMP3);
                  M_STWX(s3, s1, REG_ITMP2);
                  break;

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

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

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

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

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

                  s1 = emit_load_s1(jd, iptr, REG_A0);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_A1);

                  /* XXX what if array is NULL */
                  disp = dseg_add_functionptr(cd, BUILTIN_FAST_canstore);
                  M_ALD(REG_ITMP3, REG_PV, disp);
                  M_MTCTR(REG_ITMP3);

                  M_INTMOVE(s1, REG_A0);
                  M_INTMOVE(s3, REG_A1);

                  M_JSR;
                  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);
                  M_SLL_IMM(s2, 2, REG_ITMP2);
                  M_IADD_IMM(REG_ITMP2, OFFSET(java_objectarray_t, data[0]), REG_ITMP2);
                  /* implicit null-pointer check */
                  M_STWX(s3, s1, REG_ITMP2);
                  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);

                        patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);
                  }
                  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))
                              patcher_add_patch_ref(jd, PATCHER_initialize_class,
                                                            fi->clazz, disp);
                  }

                  M_ALD(REG_ITMP1, REG_PV, disp);
                  switch (fieldtype) {
                  case TYPE_INT:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ILD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                        M_ILD_INTERN(GET_LOW_REG(d), REG_ITMP1, 4);/* keep this order */
                        M_ILD_INTERN(GET_HIGH_REG(d), REG_ITMP1, 0);/*keep this order */
                        break;
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ALD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD_INTERN(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);

                        patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);
                  }
                  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))
                              patcher_add_patch_ref(jd, PATCHER_initialize_class,
                                                            fi->clazz, disp);
                  }

                  M_ALD(REG_ITMP1, REG_PV, disp);
                  switch (fieldtype) {
                  case TYPE_INT:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_IST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP23_PACKED);
                        M_LST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_ADR:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_AST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP2);
                        M_FST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP2);
                        M_DST_INTERN(s1, 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;

                        patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);
                  }
                  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_ITMP2);
                        M_ILD(d, s1, disp);
                        break;
                  case TYPE_LNG:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
                        if (GET_HIGH_REG(d) == s1) {
                              M_ILD(GET_LOW_REG(d), s1, disp + 4);
                              M_ILD(GET_HIGH_REG(d), s1, disp);
                        }
                        else {
                              M_ILD(GET_HIGH_REG(d), s1, disp);
                              M_ILD(GET_LOW_REG(d), s1, disp + 4);
                        }
                        break;
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ALD(d, s1, disp);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD(d, s1, disp);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD(d, s1, disp);
                        break;
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

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

                  if (IS_INT_LNG_TYPE(fieldtype)) {
                        if (IS_2_WORD_TYPE(fieldtype))
                              s2 = emit_load_s2(jd, iptr, REG_ITMP23_PACKED);
                        else
                              s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  }
                  else
                        s2 = emit_load_s2(jd, iptr, REG_FTMP2);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr))
                        patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);

                  /* implicit null-pointer check */
                  switch (fieldtype) {
                  case TYPE_INT:
                        M_IST(s2, s1, disp);
                        break;
                  case TYPE_LNG:
                        M_IST(GET_LOW_REG(s2), s1, disp + 4);      /* keep this order */
                        M_IST(GET_HIGH_REG(s2), s1, disp);         /* keep this order */
                        break;
                  case TYPE_ADR:
                        M_AST(s2, s1, disp);
                        break;
                  case TYPE_FLT:
                        M_FST(s2, s1, disp);
                        break;
                  case TYPE_DBL:
                        M_DST(s2, 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);

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

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

                  disp = dseg_add_functionptr(cd, asm_handle_exception);
                  M_ALD(REG_ITMP2, REG_PV, disp);
                  M_MTCTR(REG_ITMP2);

                  if (code_is_leafmethod(code))
                        M_MFLR(REG_ITMP3);                          /* save LR        */

                  M_BL(0);                                        /* get current PC */
                  M_MFLR(REG_ITMP2_XPC);

                  if (code_is_leafmethod(code))
                        M_MTLR(REG_ITMP3);                          /* restore LR     */

                  M_RTS;                                          /* jump to CTR    */
                  ALIGNCODENOP;
                  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_TST(s1);
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IFNULL, BRANCH_OPT_NONE);
                  break;

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

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767))
                        M_CMPI(s1, iptr->sx.val.i);
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_bcc(cd, iptr->dst.block, iptr->opc - ICMD_IFEQ, BRANCH_OPT_NONE);
                  break;


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

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
                  if (iptr->sx.val.l == 0) {
                        M_IOR_TST(s1, s2, REG_ITMP3);
                  }
                  else if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_XOR_IMM(s2, 0, REG_ITMP2);
                        M_XOR_IMM(s1, iptr->sx.val.l & 0xffff, REG_ITMP1);
                        M_IOR_TST(REG_ITMP1, REG_ITMP2, REG_ITMP3);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_XOR(s1, REG_ITMP3, REG_ITMP1);
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_XOR(s2, REG_ITMP3, REG_ITMP2);
                        M_IOR_TST(REG_ITMP1, REG_ITMP2, REG_ITMP3);
                  }
                  emit_beq(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_LLT:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
                  if (iptr->sx.val.l == 0) {
                        /* if high word is less than zero, the whole long is too */
                        M_CMPI(s2, 0);
                        emit_blt(cd, iptr->dst.block);
                  }
                  else if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_CMPI(s2, 0);
                        emit_blt(cd, iptr->dst.block);
                        emit_label_bgt(cd, BRANCH_LABEL_1);
                        M_CMPUI(s1, iptr->sx.val.l & 0xffff);
                        emit_blt(cd, iptr->dst.block);
                        emit_label(cd, BRANCH_LABEL_1);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_CMP(s2, REG_ITMP3);
                        emit_blt(cd, iptr->dst.block);
                        emit_label_bgt(cd, BRANCH_LABEL_1);
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_CMPU(s1, REG_ITMP3);
                        emit_blt(cd, iptr->dst.block);
                        emit_label(cd, BRANCH_LABEL_1);
                  }
                  break;
                  
            case ICMD_IF_LLE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
/*                if (iptr->sx.val.l == 0) { */
/*                      M_IOR(s1, s2, REG_ITMP3); */
/*                      M_CMPI(REG_ITMP3, 0); */

/*                      } else  */
                  if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_CMPI(s2, 0);
                        emit_blt(cd, iptr->dst.block);
                        emit_label_bgt(cd, BRANCH_LABEL_1);
                        M_CMPUI(s1, iptr->sx.val.l & 0xffff);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_CMP(s2, REG_ITMP3);
                        emit_blt(cd, iptr->dst.block);
                        emit_label_bgt(cd, BRANCH_LABEL_1);
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_CMPU(s1, REG_ITMP3);
                  }
                  emit_ble(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;
                  
            case ICMD_IF_LNE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
                  if (iptr->sx.val.l == 0) {
                        M_IOR_TST(s1, s2, REG_ITMP3);
                  }
                  else if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_XOR_IMM(s2, 0, REG_ITMP2);
                        M_XOR_IMM(s1, iptr->sx.val.l & 0xffff, REG_ITMP1);
                        M_IOR_TST(REG_ITMP1, REG_ITMP2, REG_ITMP3);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_XOR(s1, REG_ITMP3, REG_ITMP1);
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_XOR(s2, REG_ITMP3, REG_ITMP2);
                        M_IOR_TST(REG_ITMP1, REG_ITMP2, REG_ITMP3);
                  }
                  emit_bne(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_LGT:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
/*                if (iptr->sx.val.l == 0) { */
/*                      M_IOR(s1, s2, REG_ITMP3); */
/*                      M_CMPI(REG_ITMP3, 0); */

/*                      } else  */
                  if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_CMPI(s2, 0);
                        emit_bgt(cd, iptr->dst.block);
                        emit_label_blt(cd, BRANCH_LABEL_1);
                        M_CMPUI(s1, iptr->sx.val.l & 0xffff);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_CMP(s2, REG_ITMP3);
                        emit_bgt(cd, iptr->dst.block);
                        emit_label_blt(cd, BRANCH_LABEL_1);
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_CMPU(s1, REG_ITMP3);
                  }
                  emit_bgt(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;
                  
            case ICMD_IF_LGE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s1_high(jd, iptr, REG_ITMP2);
                  if (iptr->sx.val.l == 0) {
                        /* if high word is greater equal zero, the whole long is too */
                        M_CMPI(s2, 0);
                        emit_bge(cd, iptr->dst.block);
                  }
                  else if ((iptr->sx.val.l >= 0) && (iptr->sx.val.l <= 0xffff)) {
                        M_CMPI(s2, 0);
                        emit_bgt(cd, iptr->dst.block);
                        emit_label_blt(cd, BRANCH_LABEL_1);
                        M_CMPUI(s1, iptr->sx.val.l & 0xffff);
                        emit_bge(cd, iptr->dst.block);
                        emit_label(cd, BRANCH_LABEL_1);
                  }
                  else {
                        ICONST(REG_ITMP3, iptr->sx.val.l >> 32);
                        M_CMP(s2, REG_ITMP3);
                        emit_bgt(cd, iptr->dst.block);
                        emit_label_blt(cd, BRANCH_LABEL_1);
                        ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                        M_CMPU(s1, REG_ITMP3);
                        emit_bge(cd, iptr->dst.block);
                        emit_label(cd, BRANCH_LABEL_1);
                  }
                  break;

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

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

            case ICMD_IF_ACMPEQ:    /* op1 = target JavaVM pc                     */
            case ICMD_IF_ACMPNE:

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

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_label_bne(cd, BRANCH_LABEL_1);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_beq(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bne(cd, iptr->dst.block);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bne(cd, iptr->dst.block);
                  break;

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_blt(cd, iptr->dst.block);
                  emit_label_bgt(cd, BRANCH_LABEL_1);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMPU(s1, s2);
                  emit_blt(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bgt(cd, iptr->dst.block);
                  emit_label_blt(cd, BRANCH_LABEL_1);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMPU(s1, s2);
                  emit_bgt(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_blt(cd, iptr->dst.block);
                  emit_label_bgt(cd, BRANCH_LABEL_1);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMPU(s1, s2);
                  emit_ble(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;

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

                  s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bgt(cd, iptr->dst.block);
                  emit_label_blt(cd, BRANCH_LABEL_1);
                  s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
                  M_CMPU(s1, s2);
                  emit_bge(cd, iptr->dst.block);
                  emit_label(cd, BRANCH_LABEL_1);
                  break;

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

                  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)) {
                        unresolved_class *uc = iptr->sx.s23.s2.uc;

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

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

                  REPLACEMENT_POINT_RETURN(cd, iptr);
                  s1 = emit_load_s1(jd, iptr, REG_RESULT_PACKED);
                  M_LNGMOVE(s1, REG_RESULT_PACKED);
                  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;

                  /* call trace function */

                  emit_verbosecall_exit(jd);

#if defined(ENABLE_THREADS)
                  if (checksync && code_is_synchronized(code)) {
                        disp = dseg_add_functionptr(cd, LOCK_monitor_exit);
                        M_ALD(REG_ITMP3, REG_PV, disp);
                        M_MTCTR(REG_ITMP3);

                        /* we need to save the proper return value */

                        switch (iptr->opc) {
                        case ICMD_LRETURN:
                              M_IST(REG_RESULT2, REG_SP, rd->memuse * 8 + 8);
                              /* fall through */
                        case ICMD_IRETURN:
                        case ICMD_ARETURN:
                              M_IST(REG_RESULT , REG_SP, rd->memuse * 8 + 4);
                              break;
                        case ICMD_FRETURN:
                        case ICMD_DRETURN:
                              M_DST(REG_FRESULT, REG_SP, rd->memuse * 8 + 4);
                              break;
                        }

                        M_ALD(REG_A0, REG_SP, rd->memuse * 8);
                        M_JSR;

                        /* and now restore the proper return value */

                        switch (iptr->opc) {
                        case ICMD_LRETURN:
                              M_ILD(REG_RESULT2, REG_SP, rd->memuse * 8 + 8);
                              /* fall through */
                        case ICMD_IRETURN:
                        case ICMD_ARETURN:
                              M_ILD(REG_RESULT , REG_SP, rd->memuse * 8 + 4);
                              break;
                        case ICMD_FRETURN:
                        case ICMD_DRETURN:
                              M_DLD(REG_FRESULT, REG_SP, rd->memuse * 8 + 4);
                              break;
                        }
                  }
#endif

                  /* restore return address                                         */

                  if (!code_is_leafmethod(code)) {
                        /* ATTENTION: Don't use REG_ZERO (r0) here, as M_ALD
                           may have a displacement overflow. */

                        M_ALD(REG_ITMP1, REG_SP, p * 8 + LA_LR_OFFSET);
                        M_MTLR(REG_ITMP1);
                  }

                  /* restore saved registers                                        */

                  for (i = INT_SAV_CNT - 1; i >= rd->savintreguse; i--) {
                        p--; M_ILD(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_LDA(REG_SP, REG_SP, cd->stackframesize * 8);

                  M_RET;
                  ALIGNCODENOP;
                  }
                  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);
                  if (l == 0)
                        M_INTMOVE(s1, REG_ITMP1);
                  else if (l <= 32768)
                        M_LDA(REG_ITMP1, s1, -l);
                  else {
                        ICONST(REG_ITMP2, l);
                        M_ISUB(s1, REG_ITMP2, REG_ITMP1);
                  }

                  i = i - l + 1;

                  /* range check */

                  M_CMPUI(REG_ITMP1, i - 1);
                  emit_bgt(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_SLL_IMM(REG_ITMP1, 2, REG_ITMP1);
                  M_IADD(REG_ITMP1, REG_PV, REG_ITMP2);
                  M_ALD(REG_ITMP2, REG_ITMP2, -(cd->dseglen));
                  M_MTCTR(REG_ITMP2);
                  M_RTS;
                  ALIGNCODENOP;
                  }
                  break;


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

                  lookup = iptr->dst.lookup;

                  i = iptr->sx.s23.s2.lookupcount;
                  
                  MCODECHECK((i<<2)+8);
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  while (--i >= 0) {
                        if ((lookup->value >= -32768) && (lookup->value <= 32767)) {
                              M_CMPI(s1, lookup->value);
                        }
                        else {
                              disp = dseg_add_s4(cd, lookup->value);
                              M_ILD(REG_ITMP2, REG_PV, disp);
                              M_CMP(s1, REG_ITMP2);
                        }
                        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:
                  i = md->paramcount;

                  MCODECHECK((i << 1) + 64);

                  /* Copy arguments to registers or stack location. */

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

                        /* Already pre-allocated? */

                        if (var->flags & PREALLOC)
                              continue;

                        if (!md->params[i].inmemory) {
                              s1 = emit_load(jd, iptr, var, d);

                              switch (var->type) {
                              case TYPE_INT:
                              case TYPE_ADR:
                                    M_INTMOVE(s1, d);
                                    break;

                              case TYPE_LNG:
                                    M_LNGMOVE(s1, d);
                                    break;

                              case TYPE_FLT:
                              case TYPE_DBL:
                                    M_FLTMOVE(s1, d);
                                    break;
                              }
                        }
                        else {
                              switch (var->type) {
                              case TYPE_INT:
                              case TYPE_ADR:
                                    s1 = emit_load(jd, iptr, var, REG_ITMP1);
                                    M_IST(s1, REG_SP, d);
                                    break;

                              case TYPE_LNG:
                                    s1 = emit_load(jd, iptr, var, REG_ITMP12_PACKED);
                                    M_LST(s1, REG_SP, d);
                                    break;

                              case TYPE_FLT:
                              case TYPE_DBL:
                                    s1 = emit_load(jd, iptr, var, REG_FTMP1);
                                    M_DST(s1, REG_SP, d);
                                    break;
                              }
                        }
                  }

                  switch (iptr->opc) {
                  case ICMD_BUILTIN:
                        if (bte->stub == NULL)
                              disp = dseg_add_functionptr(cd, bte->fp);
                        else
                              disp = dseg_add_functionptr(cd, bte->stub);

                        M_ALD(REG_PV, REG_PV, disp);  /* pointer to built-in-function */

                        /* generate the actual call */

                        M_MTCTR(REG_PV);
                        M_JSR;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                        REPLACEMENT_POINT_FORGC_BUILTIN_RETURN(cd, iptr);
                        disp = (s4) (cd->mcodeptr - cd->mcodebase);
                        M_MFLR(REG_ITMP1);
                        M_LDA(REG_PV, REG_ITMP1, -disp);
                        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_address(cd, lm->stubroutine);

                        M_ALD(REG_PV, REG_PV, disp);

                        /* generate the actual call */

                        M_MTCTR(REG_PV);
                        M_JSR;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                        disp = (s4) (cd->mcodeptr - cd->mcodebase);
                        M_MFLR(REG_ITMP1);
                        M_LDA(REG_PV, REG_ITMP1, -disp);
                        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_ALD(REG_PV, REG_METHODPTR, s1);

                        /* generate the actual call */

                        M_MTCTR(REG_PV);
                        M_JSR;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                        disp = (s4) (cd->mcodeptr - cd->mcodebase);
                        M_MFLR(REG_ITMP1);
                        M_LDA(REG_PV, REG_ITMP1, -disp);
                        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_ALD(REG_METHODPTR, REG_METHODPTR, s1);
                        M_ALD(REG_PV, REG_METHODPTR, s2);

                        /* generate the actual call */

                        M_MTCTR(REG_PV);
                        M_JSR;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                        disp = (s4) (cd->mcodeptr - cd->mcodebase);
                        M_MFLR(REG_ITMP1);
                        M_LDA(REG_PV, REG_ITMP1, -disp);
                        break;
                  }

                  /* Store return value. */

                  switch (md->returntype.type) {
                  case TYPE_INT:
                  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_LNG:
                        s1 = codegen_reg_of_dst(jd, iptr, REG_RESULT_PACKED);
                        M_LNGMOVE(REG_RESULT_PACKED, 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;

                  case 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_TST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_1);

                              disp = dseg_add_unique_s4(cd, 0);         /* super->flags */

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

                              M_ILD(REG_ITMP2, REG_PV, disp);
                              M_IAND_IMM(REG_ITMP2, ACC_INTERFACE, REG_ITMP2);
                              emit_label_beq(cd, BRANCH_LABEL_2);
                        }

                        /* interface checkcast code */

                        if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                              if (super == NULL) {
                                    patcher_add_patch_ref(jd,
                                                                  PATCHER_checkcast_interface,
                                                                  iptr->sx.s23.s3.c.ref,
                                                                  0);
                              }
                              else {
                                    M_TST(s1);
                                    emit_label_beq(cd, BRANCH_LABEL_3);
                              }

                              M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                              M_ILD(REG_ITMP3, REG_ITMP2, OFFSET(vftbl_t, interfacetablelength));
                              M_LDATST(REG_ITMP3, REG_ITMP3, -superindex);
                              emit_classcast_check(cd, iptr, BRANCH_LE, REG_ITMP3, s1);

                              M_ALD(REG_ITMP3, REG_ITMP2,
                                      OFFSET(vftbl_t, interfacetable[0]) -
                                      superindex * sizeof(methodptr*));
                              M_TST(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);

                                    disp = dseg_add_unique_address(cd, NULL);

                                    patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_vftbl,
                                                                  iptr->sx.s23.s3.c.ref,
                                                                  disp);
                              }
                              else {
                                    disp = dseg_add_address(cd, super->vftbl);

                                    M_TST(s1);
                                    emit_label_beq(cd, BRANCH_LABEL_5);
                              }

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

                              M_ILD(REG_ITMP3, REG_ITMP2, OFFSET(vftbl_t, baseval));
                              M_ALD(REG_ITMP2, REG_PV, disp);
                              if (s1 != REG_ITMP1) {
                                    M_ILD(REG_ITMP1, REG_ITMP2, OFFSET(vftbl_t, baseval));
                                    M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, diffval));

                                    M_ISUB(REG_ITMP3, REG_ITMP1, REG_ITMP3);
                              }
                              else {
                                    M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, baseval));
                                    M_ISUB(REG_ITMP3, REG_ITMP2, REG_ITMP3);
                                    M_ALD(REG_ITMP2, REG_PV, disp);
                                    M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, diffval));
                              }
                              M_CMPU(REG_ITMP3, REG_ITMP2);
                              emit_classcast_check(cd, iptr, BRANCH_GT, 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, s1);
                  }
                  else {
                        /* array type cast-check */

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

                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                              disp = dseg_add_unique_address(cd, NULL);

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

                        M_ALD(REG_A1, REG_PV, disp);
                        disp = dseg_add_functionptr(cd, BUILTIN_arraycheckcast);
                        M_ALD(REG_ITMP2, REG_PV, disp);
                        M_MTCTR(REG_ITMP2);
                        M_JSR;
                        M_TST(REG_RESULT);
                        emit_classcast_check(cd, iptr, BRANCH_EQ, REG_RESULT, s1);

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

                  M_CLR(d);

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

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

                        disp = dseg_add_unique_s4(cd, 0);             /* super->flags */

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

                        M_ILD(REG_ITMP3, REG_PV, disp);
                        M_IAND_IMM(REG_ITMP3, ACC_INTERFACE, REG_ITMP3);
                        emit_label_beq(cd, BRANCH_LABEL_2);
                  }

                  /* interface instanceof code */

                  if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                        if (super == NULL) {
                              patcher_add_patch_ref(jd,
                                                            PATCHER_instanceof_interface,
                                                            iptr->sx.s23.s3.c.ref, 0);
                        }
                        else {
                              M_TST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_3);
                        }

                        M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                        M_ILD(REG_ITMP3, REG_ITMP1, OFFSET(vftbl_t, interfacetablelength));
                        M_LDATST(REG_ITMP3, REG_ITMP3, -superindex);
                        M_BLE(4);
                        M_ALD(REG_ITMP1, REG_ITMP1,
                                OFFSET(vftbl_t, interfacetable[0]) -
                                superindex * sizeof(methodptr*));
                        M_TST(REG_ITMP1);
                        M_BEQ(1);
                        M_IADD_IMM(REG_ZERO, 1, 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);

                              disp = dseg_add_unique_address(cd, NULL);

                              patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_vftbl,
                                                            iptr->sx.s23.s3.c.ref,
                                                            disp);
                        }
                        else {
                              disp = dseg_add_address(cd, super->vftbl);

                              M_TST(s1);
                              emit_label_beq(cd, BRANCH_LABEL_5);
                        }

                        M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                        M_ALD(REG_ITMP2, REG_PV, disp);

                        M_ILD(REG_ITMP1, REG_ITMP1, OFFSET(vftbl_t, baseval));
                        M_ILD(REG_ITMP3, REG_ITMP2, OFFSET(vftbl_t, baseval));
                        M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, diffval));

                        M_ISUB(REG_ITMP1, REG_ITMP3, REG_ITMP1);
                        M_CMPU(REG_ITMP1, REG_ITMP2);
                        M_CLR(d);
                        M_BGT(1);
                        M_IADD_IMM(REG_ZERO, 1, 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((iptr->s1.argcount << 1) + 64);

                  for (s1 = iptr->s1.argcount; --s1 >= 0;) {
                        var = VAR(iptr->sx.s23.s2.args[s1]);

                        /* copy SAVEDVAR sizes to stack */

                        /* Already Preallocated? */
                        if (!(var->flags & PREALLOC)) {
                              s2 = emit_load(jd, iptr, var, REG_ITMP1);
#if defined(__DARWIN__)
                              M_IST(s2, REG_SP, LA_SIZE + (s1 + INT_ARG_CNT) * 4);
#else
                              M_IST(s2, REG_SP, LA_SIZE + (s1 + 3) * 4);
#endif
                        }
                  }

                  /* a0 = dimension count */

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

                  /* is patcher function set? */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        disp = dseg_add_unique_address(cd, NULL);

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

                  /* a1 = arraydescriptor */

                  M_ALD(REG_A1, REG_PV, disp);

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

#if defined(__DARWIN__)
                  M_LDA(REG_A2, REG_SP, LA_SIZE + INT_ARG_CNT * 4);
#else
                  M_LDA(REG_A2, REG_SP, LA_SIZE + 3 * 4);
#endif

                  disp = dseg_add_functionptr(cd, BUILTIN_multianewarray);
                  M_ALD(REG_ITMP3, REG_PV, disp);
                  M_MTCTR(REG_ITMP3);
                  M_JSR;

                  /* check for exception before result assignment */

                  emit_exception_check(cd, iptr);

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

            default:
                  exceptions_throw_internalerror("Unknown ICMD %d during code generation",
                                                               iptr->opc);
                  return false;
      } /* switch */
            
      } /* for instruction */
            
      } /* if (bptr -> flags >= BBREACHED) */
      } /* for basic block */

      /* generate 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;
      s4           i, j;                 /* count variables                    */
      s4           t;
      s4           s1, s2;
      int          disp;

      /* Sanity check. */

      assert(f != NULL);

      /* Get required compiler data. */

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

      /* set some variables */

      md = m->parseddesc;

      /* calculate stackframe size */

      cd->stackframesize =
            sizeof(stackframeinfo_t) / SIZEOF_VOID_P +
            sizeof(localref_table) / SIZEOF_VOID_P +
            4 +                            /* 4 stackframeinfo arguments (darwin) */
            nmd->paramcount +
            nmd->memuse;

      /* keep stack 16-byte aligned */

      ALIGN_2(cd->stackframesize);

      /* 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);                      /* IsSync          */
      (void) dseg_add_unique_s4(cd, 0);                      /* IsLeaf          */
      (void) dseg_add_unique_s4(cd, 0);                      /* IntSave         */
      (void) dseg_add_unique_s4(cd, 0);                      /* FltSave         */

      /* generate code */

      M_MFLR(REG_ZERO);
      M_AST_INTERN(REG_ZERO, REG_SP, LA_LR_OFFSET);
      M_STWU(REG_SP, REG_SP, -(cd->stackframesize * 8));

#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 * 4);
#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_ADR:
                        M_IST(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  case TYPE_LNG:
                        M_LST(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  case TYPE_FLT:
                  case TYPE_DBL:
                        M_DST(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  }
            }
      }

      /* create native stack info */

      M_MOV(REG_SP, REG_A0);
      M_MOV(REG_PV, REG_A1);
      disp = dseg_add_functionptr(cd, codegen_start_native_call);
      M_ALD(REG_ITMP1, REG_PV, disp);
      M_MTCTR(REG_ITMP1);
      M_JSR;

      /* remember class argument */

      if (m->flags & ACC_STATIC)
            M_MOV(REG_RESULT, REG_ITMP3);

      /* 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_ADR:
                        M_ILD(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  case TYPE_LNG:
                        M_LLD(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  case TYPE_FLT:
                  case TYPE_DBL:
                        M_DLD(s1, REG_SP, LA_SIZE + 4*4 + i * 8);
                        break;
                  }
            }
      }

      /* copy or spill arguments to new locations */

      for (i = md->paramcount - 1, j = i + skipparams; i >= 0; i--, j--) {
            t = md->paramtypes[i].type;

            if (!md->params[i].inmemory) {
                  s1 = md->params[i].regoff;
                  s2 = nmd->params[j].regoff;

                  switch (t) {
                  case TYPE_INT:
                  case TYPE_ADR:
                        if (!nmd->params[j].inmemory)
                              M_INTMOVE(s1, s2);
                        else
                              M_IST(s1, REG_SP, s2);
                        break;

                  case TYPE_LNG:
                        if (!nmd->params[j].inmemory)
                              M_LNGMOVE(s1, s2);
                        else
                              M_LST(s1, REG_SP, s2);
                        break;

                  case TYPE_FLT:
                  case TYPE_DBL:
                        /* We only copy spilled float arguments, as the float
                           argument registers keep unchanged. */
                        break;
                  }
            }
            else {
                  s1 = md->params[i].regoff + cd->stackframesize * 8;
                  s2 = nmd->params[j].regoff;

                  switch (t) {
                  case TYPE_INT:
                  case TYPE_ADR:
                        M_ILD(REG_ITMP1, REG_SP, s1);
                        M_IST(REG_ITMP1, REG_SP, s2);
                        break;

                  case TYPE_LNG:
                        M_LLD(REG_ITMP12_PACKED, REG_SP, s1);
                        M_LST(REG_ITMP12_PACKED, REG_SP, s2);
                        break;

                  case TYPE_FLT:
                        M_DLD(REG_FTMP1, REG_SP, s1);
                        M_FST(REG_FTMP1, REG_SP, s2);
                        break;

                  case TYPE_DBL:
                        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_ITMP3, REG_A1);

            /* put env into first argument register */

            disp = dseg_add_address(cd, _Jv_env);
            M_ALD(REG_A0, REG_PV, disp);
      }

      /* Call the native function. */

      disp = dseg_add_functionptr(cd, f);
      M_ALD(REG_ITMP3, REG_PV, disp);
      M_MTCTR(REG_ITMP3);
      M_JSR;

      /* save return value */

      switch (md->returntype.type) {
      case TYPE_INT:
      case TYPE_ADR:
            M_IST(REG_RESULT, REG_SP, LA_SIZE + 2 * 4);
            break;
      case TYPE_LNG:
            M_LST(REG_RESULT_PACKED, REG_SP, LA_SIZE + 2 * 4);
            break;
      case TYPE_FLT:
      case TYPE_DBL:
            M_DST(REG_FRESULT, REG_SP, LA_SIZE + 2 * 4);
            break;
      case TYPE_VOID:
            break;
      }

      /* remove native stackframe info */

      M_MOV(REG_SP, REG_A0);
      M_MOV(REG_PV, REG_A1);
      disp = dseg_add_functionptr(cd, codegen_finish_native_call);
      M_ALD(REG_ITMP1, REG_PV, disp);
      M_MTCTR(REG_ITMP1);
      M_JSR;
      M_MOV(REG_RESULT, REG_ITMP1_XPTR);

      /* restore return value */

      switch (md->returntype.type) {
      case TYPE_INT:
      case TYPE_ADR:
            M_ILD(REG_RESULT, REG_SP, LA_SIZE + 2 * 4);
            break;
      case TYPE_LNG:
            M_LLD(REG_RESULT_PACKED, REG_SP, LA_SIZE + 2 * 4);
            break;
      case TYPE_FLT:
      case TYPE_DBL:
            M_DLD(REG_FRESULT, REG_SP, LA_SIZE + 2 * 4);
            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 * 4);
#endif

      M_ALD(REG_ITMP2_XPC, REG_SP, cd->stackframesize * 8 + LA_LR_OFFSET);
      M_MTLR(REG_ITMP2_XPC);
      M_LDA(REG_SP, REG_SP, cd->stackframesize * 8); /* remove stackframe       */

      /* check for exception */

      M_TST(REG_ITMP1_XPTR);
      M_BNE(1);                           /* if no exception then return        */

      M_RET;

      /* handle exception */

      M_IADD_IMM(REG_ITMP2_XPC, -4, REG_ITMP2_XPC);  /* exception address       */

      disp = dseg_add_functionptr(cd, asm_handle_nat_exception);
      M_ALD(REG_ITMP3, REG_PV, disp);
      M_MTCTR(REG_ITMP3);
      M_RTS;
}


/*
 * 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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