1 /* src/vm/jit/emit-common.c - common code emitter functions
3 Copyright (C) 2006, 2007 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: emitfuncs.c 4398 2006-01-31 23:43:08Z twisti $
39 #include "vm/jit/emit-common.h"
40 #include "vm/jit/jit.h"
42 #include "vmcore/options.h"
43 #include "vmcore/statistics.h"
46 /* emit_load_s1 ****************************************************************
48 Emits a possible load of the first source operand.
50 *******************************************************************************/
52 s4 emit_load_s1(jitdata *jd, instruction *iptr, s4 tempreg)
57 src = VAROP(iptr->s1);
59 reg = emit_load(jd, iptr, src, tempreg);
65 /* emit_load_s2 ****************************************************************
67 Emits a possible load of the second source operand.
69 *******************************************************************************/
71 s4 emit_load_s2(jitdata *jd, instruction *iptr, s4 tempreg)
76 src = VAROP(iptr->sx.s23.s2);
78 reg = emit_load(jd, iptr, src, tempreg);
84 /* emit_load_s3 ****************************************************************
86 Emits a possible load of the third source operand.
88 *******************************************************************************/
90 s4 emit_load_s3(jitdata *jd, instruction *iptr, s4 tempreg)
95 src = VAROP(iptr->sx.s23.s3);
97 reg = emit_load(jd, iptr, src, tempreg);
103 /* emit_load_s1_low ************************************************************
105 Emits a possible load of the low 32-bits of the first long source
108 *******************************************************************************/
110 #if SIZEOF_VOID_P == 4
111 s4 emit_load_s1_low(jitdata *jd, instruction *iptr, s4 tempreg)
116 src = VAROP(iptr->s1);
118 reg = emit_load_low(jd, iptr, src, tempreg);
125 /* emit_load_s2_low ************************************************************
127 Emits a possible load of the low 32-bits of the second long source
130 *******************************************************************************/
132 #if SIZEOF_VOID_P == 4
133 s4 emit_load_s2_low(jitdata *jd, instruction *iptr, s4 tempreg)
138 src = VAROP(iptr->sx.s23.s2);
140 reg = emit_load_low(jd, iptr, src, tempreg);
147 /* emit_load_s3_low ************************************************************
149 Emits a possible load of the low 32-bits of the third long source
152 *******************************************************************************/
154 #if SIZEOF_VOID_P == 4
155 s4 emit_load_s3_low(jitdata *jd, instruction *iptr, s4 tempreg)
160 src = VAROP(iptr->sx.s23.s3);
162 reg = emit_load_low(jd, iptr, src, tempreg);
169 /* emit_load_s1_high ***********************************************************
171 Emits a possible load of the high 32-bits of the first long source
174 *******************************************************************************/
176 #if SIZEOF_VOID_P == 4
177 s4 emit_load_s1_high(jitdata *jd, instruction *iptr, s4 tempreg)
182 src = VAROP(iptr->s1);
184 reg = emit_load_high(jd, iptr, src, tempreg);
191 /* emit_load_s2_high ***********************************************************
193 Emits a possible load of the high 32-bits of the second long source
196 *******************************************************************************/
198 #if SIZEOF_VOID_P == 4
199 s4 emit_load_s2_high(jitdata *jd, instruction *iptr, s4 tempreg)
204 src = VAROP(iptr->sx.s23.s2);
206 reg = emit_load_high(jd, iptr, src, tempreg);
213 /* emit_load_s3_high ***********************************************************
215 Emits a possible load of the high 32-bits of the third long source
218 *******************************************************************************/
220 #if SIZEOF_VOID_P == 4
221 s4 emit_load_s3_high(jitdata *jd, instruction *iptr, s4 tempreg)
226 src = VAROP(iptr->sx.s23.s3);
228 reg = emit_load_high(jd, iptr, src, tempreg);
235 /* emit_store_dst **************************************************************
237 This function generates the code to store the result of an
238 operation back into a spilled pseudo-variable. If the
239 pseudo-variable has not been spilled in the first place, this
240 function will generate nothing.
242 *******************************************************************************/
244 void emit_store_dst(jitdata *jd, instruction *iptr, s4 d)
246 emit_store(jd, iptr, VAROP(iptr->dst), d);
250 /* emit_bccz *******************************************************************
252 Emit conditional and unconditional branch instructions on integer
255 *******************************************************************************/
257 void emit_bccz(codegendata *cd, basicblock *target, s4 condition, s4 reg, u4 options)
262 /* Target basic block already has an PC, so we can generate the
263 branch immediately. */
265 if ((target->mpc >= 0)) {
266 STATISTICS(count_branches_resolved++);
268 /* calculate the mpc of the branch instruction */
270 branchmpc = cd->mcodeptr - cd->mcodebase;
271 disp = target->mpc - branchmpc;
273 #if defined(STATISTICS)
275 if ((int8_t)disp == disp) count_emit_branch_8bit++;
276 else if ((int16_t)disp == disp) count_emit_branch_16bit++;
277 else if ((int32_t)disp == disp) count_emit_branch_32bit++;
278 #if (SIZEOF_VOID_P == 8)
279 else if ((int64_t)disp == disp) count_emit_branch_64bit++;
282 emit_branch(cd, disp, condition, reg, options);
285 /* current mcodeptr is the correct position,
286 afterwards emit the NOPs */
288 codegen_add_branch_ref(cd, target, condition, reg, options);
290 /* generate NOPs as placeholder for branch code */
297 /* emit_bcc ********************************************************************
299 Emit conditional and unconditional branch instructions on condition
302 *******************************************************************************/
304 void emit_bcc(codegendata *cd, basicblock *target, s4 condition, u4 options)
306 emit_bccz(cd, target, condition, -1, options);
310 /* emit_br *********************************************************************
312 Wrapper for unconditional branches.
314 *******************************************************************************/
316 void emit_br(codegendata *cd, basicblock *target)
318 emit_bcc(cd, target, BRANCH_UNCONDITIONAL, BRANCH_OPT_NONE);
322 /* emit_bxxz *******************************************************************
324 Wrappers for branches on one integer register.
326 *******************************************************************************/
328 #if SUPPORT_BRANCH_CONDITIONAL_ONE_INTEGER_REGISTER
330 void emit_beqz(codegendata *cd, basicblock *target, s4 reg)
332 emit_bccz(cd, target, BRANCH_EQ, reg, BRANCH_OPT_NONE);
335 void emit_bnez(codegendata *cd, basicblock *target, s4 reg)
337 emit_bccz(cd, target, BRANCH_NE, reg, BRANCH_OPT_NONE);
340 void emit_bltz(codegendata *cd, basicblock *target, s4 reg)
342 emit_bccz(cd, target, BRANCH_LT, reg, BRANCH_OPT_NONE);
345 void emit_bgez(codegendata *cd, basicblock *target, s4 reg)
347 emit_bccz(cd, target, BRANCH_GE, reg, BRANCH_OPT_NONE);
350 void emit_bgtz(codegendata *cd, basicblock *target, s4 reg)
352 emit_bccz(cd, target, BRANCH_GT, reg, BRANCH_OPT_NONE);
355 void emit_blez(codegendata *cd, basicblock *target, s4 reg)
357 emit_bccz(cd, target, BRANCH_LE, reg, BRANCH_OPT_NONE);
360 #endif /* SUPPORT_BRANCH_CONDITIONAL_ONE_INTEGER_REGISTER */
363 /* emit_bxx ********************************************************************
365 Wrappers for branches on two integer registers.
367 We use PACK_REGS here, so we don't have to change the branchref
368 data structure and the emit_bccz function.
370 *******************************************************************************/
372 #if SUPPORT_BRANCH_CONDITIONAL_TWO_INTEGER_REGISTERS
374 void emit_beq(codegendata *cd, basicblock *target, s4 s1, s4 s2)
376 emit_bccz(cd, target, BRANCH_EQ, PACK_REGS(s1, s2), BRANCH_OPT_NONE);
379 void emit_bne(codegendata *cd, basicblock *target, s4 s1, s4 s2)
381 emit_bccz(cd, target, BRANCH_NE, PACK_REGS(s1, s2), BRANCH_OPT_NONE);
384 #endif /* SUPPORT_BRANCH_CONDITIONAL_TWO_INTEGER_REGISTERS */
387 /* emit_bxx ********************************************************************
389 Wrappers for branches on condition codes.
391 *******************************************************************************/
393 #if SUPPORT_BRANCH_CONDITIONAL_CONDITION_REGISTER
395 void emit_beq(codegendata *cd, basicblock *target)
397 emit_bcc(cd, target, BRANCH_EQ, BRANCH_OPT_NONE);
400 void emit_bne(codegendata *cd, basicblock *target)
402 emit_bcc(cd, target, BRANCH_NE, BRANCH_OPT_NONE);
405 void emit_blt(codegendata *cd, basicblock *target)
407 emit_bcc(cd, target, BRANCH_LT, BRANCH_OPT_NONE);
410 void emit_bge(codegendata *cd, basicblock *target)
412 emit_bcc(cd, target, BRANCH_GE, BRANCH_OPT_NONE);
415 void emit_bgt(codegendata *cd, basicblock *target)
417 emit_bcc(cd, target, BRANCH_GT, BRANCH_OPT_NONE);
420 void emit_ble(codegendata *cd, basicblock *target)
422 emit_bcc(cd, target, BRANCH_LE, BRANCH_OPT_NONE);
425 #if SUPPORT_BRANCH_CONDITIONAL_UNSIGNED_CONDITIONS
426 void emit_bult(codegendata *cd, basicblock *target)
428 emit_bcc(cd, target, BRANCH_ULT, BRANCH_OPT_NONE);
431 void emit_bule(codegendata *cd, basicblock *target)
433 emit_bcc(cd, target, BRANCH_ULE, BRANCH_OPT_NONE);
436 void emit_buge(codegendata *cd, basicblock *target)
438 emit_bcc(cd, target, BRANCH_UGE, BRANCH_OPT_NONE);
441 void emit_bugt(codegendata *cd, basicblock *target)
443 emit_bcc(cd, target, BRANCH_UGT, BRANCH_OPT_NONE);
447 #if defined(__POWERPC__) || defined(__POWERPC64__)
448 void emit_bnan(codegendata *cd, basicblock *target)
450 emit_bcc(cd, target, BRANCH_NAN, BRANCH_OPT_NONE);
454 #endif /* SUPPORT_BRANCH_CONDITIONAL_CONDITION_REGISTER */
457 /* emit_label_bccz *************************************************************
459 Emit a branch to a label. Possibly emit the branch, if it is a
462 *******************************************************************************/
464 void emit_label_bccz(codegendata *cd, s4 label, s4 condition, s4 reg, u4 options)
467 branch_label_ref_t *br;
471 /* get the label list */
473 list = cd->brancheslabel;
475 /* search if the label is already in the list */
477 for (br = list_first_unsynced(list); br != NULL;
478 br = list_next_unsynced(list, br)) {
479 /* is this entry the correct label? */
481 if (br->label == label)
485 /* a branch reference was found */
488 /* calculate the mpc of the branch instruction */
490 mpc = cd->mcodeptr - cd->mcodebase;
491 disp = br->mpc - mpc;
493 #if defined(STATISTICS)
495 if ((int8_t)disp == disp) count_emit_branch_8bit++;
496 else if ((int16_t)disp == disp) count_emit_branch_16bit++;
497 else if ((int32_t)disp == disp) count_emit_branch_32bit++;
498 #if (SIZEOF_VOID_P == 8)
499 else if ((int64_t)disp == disp) count_emit_branch_64bit++;
502 emit_branch(cd, disp, condition, reg, options);
504 /* now remove the branch reference */
506 list_remove_unsynced(list, br);
509 /* current mcodeptr is the correct position,
510 afterwards emit the NOPs */
512 codegen_branch_label_add(cd, label, condition, reg, options);
514 /* generate NOPs as placeholder for branch code */
521 /* emit_label ******************************************************************
523 Emit a label for a branch. Possibly emit the branch, if it is a
526 *******************************************************************************/
528 void emit_label(codegendata *cd, s4 label)
531 branch_label_ref_t *br;
536 /* get the label list */
538 list = cd->brancheslabel;
540 /* search if the label is already in the list */
542 for (br = list_first_unsynced(list); br != NULL;
543 br = list_next_unsynced(list, br)) {
544 /* is this entry the correct label? */
546 if (br->label == label)
550 /* a branch reference was found */
553 /* calculate the mpc of the branch instruction */
555 mpc = cd->mcodeptr - cd->mcodebase;
556 disp = mpc - br->mpc;
558 /* temporary set the mcodeptr */
560 mcodeptr = cd->mcodeptr;
561 cd->mcodeptr = cd->mcodebase + br->mpc;
563 #if defined(STATISTICS)
565 if ((int8_t)disp == disp) count_emit_branch_8bit++;
566 else if ((int16_t)disp == disp) count_emit_branch_16bit++;
567 else if ((int32_t)disp == disp) count_emit_branch_32bit++;
568 #if (SIZEOF_VOID_P == 8)
569 else if ((int64_t)disp == disp) count_emit_branch_64bit++;
572 emit_branch(cd, disp, br->condition, br->reg, br->options);
574 /* restore mcodeptr */
576 cd->mcodeptr = mcodeptr;
578 /* now remove the branch reference */
580 list_remove_unsynced(list, br);
583 /* add the label to the list (use invalid values for condition
586 codegen_branch_label_add(cd, label, -1, -1, BRANCH_OPT_NONE );
591 /* emit_label_bcc **************************************************************
593 Emit conditional and unconditional label-branch instructions on
596 *******************************************************************************/
598 void emit_label_bcc(codegendata *cd, s4 label, s4 condition, u4 options)
600 emit_label_bccz(cd, label, condition, -1, options);
604 /* emit_label_br ***************************************************************
606 Wrapper for unconditional label-branches.
608 *******************************************************************************/
610 void emit_label_br(codegendata *cd, s4 label)
612 emit_label_bcc(cd, label, BRANCH_UNCONDITIONAL, BRANCH_OPT_NONE);
616 /* emit_label_bxxz *************************************************************
618 Wrappers for label-branches on one integer register.
620 *******************************************************************************/
622 #if SUPPORT_BRANCH_CONDITIONAL_ONE_INTEGER_REGISTER
624 void emit_label_beqz(codegendata *cd, s4 label, s4 reg)
626 emit_label_bccz(cd, label, BRANCH_EQ, reg, BRANCH_OPT_NONE);
629 #endif /* SUPPORT_BRANCH_CONDITIONAL_ONE_INTEGER_REGISTER */
632 /* emit_label_bxx **************************************************************
634 Wrappers for label-branches on condition codes.
636 *******************************************************************************/
638 #if SUPPORT_BRANCH_CONDITIONAL_CONDITION_REGISTER
640 void emit_label_beq(codegendata *cd, s4 label)
642 emit_label_bcc(cd, label, BRANCH_EQ, BRANCH_OPT_NONE);
645 void emit_label_bne(codegendata *cd, s4 label)
647 emit_label_bcc(cd, label, BRANCH_NE, BRANCH_OPT_NONE);
650 void emit_label_blt(codegendata *cd, s4 label)
652 emit_label_bcc(cd, label, BRANCH_LT, BRANCH_OPT_NONE);
655 void emit_label_bge(codegendata *cd, s4 label)
657 emit_label_bcc(cd, label, BRANCH_GE, BRANCH_OPT_NONE);
660 void emit_label_bgt(codegendata *cd, s4 label)
662 emit_label_bcc(cd, label, BRANCH_GT, BRANCH_OPT_NONE);
665 void emit_label_ble(codegendata *cd, s4 label)
667 emit_label_bcc(cd, label, BRANCH_LE, BRANCH_OPT_NONE);
670 #endif /* SUPPORT_BRANCH_CONDITIONAL_CONDITION_REGISTER */
674 * These are local overrides for various environment variables in Emacs.
675 * Please do not remove this and leave it at the end of the file, where
676 * Emacs will automagically detect them.
677 * ---------------------------------------------------------------------
680 * indent-tabs-mode: t
684 * vim:noexpandtab:sw=4:ts=4: