1 /* src/vm/jit/alpha/emit.c - Alpha code emitter functions
3 Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, 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: emit.c 4398 2006-01-31 23:43:08Z twisti $
37 #include "vm/jit/alpha/codegen.h"
39 #include "mm/memory.h"
41 #if defined(ENABLE_THREADS)
42 # include "threads/native/lock.h"
45 #include "vm/builtin.h"
46 #include "vm/exceptions.h"
48 #include "vm/jit/abi.h"
49 #include "vm/jit/abi-asm.h"
50 #include "vm/jit/asmpart.h"
51 #include "vm/jit/dseg.h"
52 #include "vm/jit/emit-common.h"
53 #include "vm/jit/jit.h"
54 #include "vm/jit/replace.h"
56 #include "vmcore/options.h"
59 /* emit_load *******************************************************************
61 Emits a possible load of an operand.
63 *******************************************************************************/
65 s4 emit_load(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
71 /* get required compiler data */
75 if (IS_INMEMORY(src->flags)) {
78 disp = src->vv.regoff * 8;
84 M_LLD(tempreg, REG_SP, disp);
88 M_DLD(tempreg, REG_SP, disp);
91 vm_abort("emit_load: unknown type %d", src->type);
103 /* emit_store ******************************************************************
105 Emit a possible store for the given variable.
107 *******************************************************************************/
109 void emit_store(jitdata *jd, instruction *iptr, varinfo *dst, s4 d)
114 /* get required compiler data */
118 if (IS_INMEMORY(dst->flags)) {
121 disp = dst->vv.regoff * 8;
127 M_LST(d, REG_SP, disp);
131 M_DST(d, REG_SP, disp);
134 vm_abort("emit_store: unknown type %d", dst->type);
140 /* emit_copy *******************************************************************
142 Generates a register/memory to register/memory copy.
144 *******************************************************************************/
146 void emit_copy(jitdata *jd, instruction *iptr)
153 /* get required compiler data */
157 /* get source and destination variables */
159 src = VAROP(iptr->s1);
160 dst = VAROP(iptr->dst);
162 if ((src->vv.regoff != dst->vv.regoff) ||
163 ((src->flags ^ dst->flags) & INMEMORY)) {
165 if ((src->type == TYPE_RET) || (dst->type == TYPE_RET)) {
166 /* emit nothing, as the value won't be used anyway */
170 /* If one of the variables resides in memory, we can eliminate
171 the register move from/to the temporary register with the
172 order of getting the destination register and the load. */
174 if (IS_INMEMORY(src->flags)) {
175 d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
176 s1 = emit_load(jd, iptr, src, d);
179 s1 = emit_load(jd, iptr, src, REG_IFTMP);
180 d = codegen_reg_of_var(iptr->opc, dst, s1);
195 vm_abort("emit_copy: unknown type %d", src->type);
199 emit_store(jd, iptr, dst, d);
204 /* emit_iconst *****************************************************************
208 *******************************************************************************/
210 void emit_iconst(codegendata *cd, s4 d, s4 value)
214 if ((value >= -32768) && (value <= 32767))
215 M_LDA_INTERN(d, REG_ZERO, value);
217 disp = dseg_add_s4(cd, value);
218 M_ILD(d, REG_PV, disp);
223 /* emit_lconst *****************************************************************
227 *******************************************************************************/
229 void emit_lconst(codegendata *cd, s4 d, s8 value)
233 if ((value >= -32768) && (value <= 32767))
234 M_LDA_INTERN(d, REG_ZERO, value);
236 disp = dseg_add_s8(cd, value);
237 M_LLD(d, REG_PV, disp);
242 /* emit_branch *****************************************************************
244 Emits the code for conditional and unconditional branchs.
246 *******************************************************************************/
248 void emit_branch(codegendata *cd, s4 disp, s4 condition, s4 reg, u4 opt)
253 /* calculate the different displacements */
255 checkdisp = (disp - 4);
256 branchdisp = (disp - 4) >> 2;
258 /* check which branch to generate */
260 if (condition == BRANCH_UNCONDITIONAL) {
261 /* check displacement for overflow */
263 if ((checkdisp < (s4) 0xffe00000) || (checkdisp > (s4) 0x001fffff)) {
264 /* if the long-branches flag isn't set yet, do it */
266 if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
267 log_println("setting error");
268 cd->flags |= (CODEGENDATA_FLAG_ERROR |
269 CODEGENDATA_FLAG_LONGBRANCHES);
272 vm_abort("emit_branch: emit unconditional long-branch code");
279 /* and displacement for overflow */
281 if ((checkdisp < (s4) 0xffe00000) || (checkdisp > (s4) 0x001fffff)) {
282 /* if the long-branches flag isn't set yet, do it */
284 if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
285 log_println("setting error");
286 cd->flags |= (CODEGENDATA_FLAG_ERROR |
287 CODEGENDATA_FLAG_LONGBRANCHES);
290 vm_abort("emit_branch: emit conditional long-branch code");
295 M_BEQZ(reg, branchdisp);
298 M_BNEZ(reg, branchdisp);
301 M_BLTZ(reg, branchdisp);
304 M_BGEZ(reg, branchdisp);
307 M_BGTZ(reg, branchdisp);
310 M_BLEZ(reg, branchdisp);
313 vm_abort("emit_branch: unknown condition %d", condition);
320 /* emit_arithmetic_check *******************************************************
322 Emit an ArithmeticException check.
324 *******************************************************************************/
326 void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
328 if (INSTRUCTION_MUST_CHECK(iptr)) {
330 /* Destination register must not be REG_ZERO, because then no
331 SIGSEGV is thrown. */
332 M_ALD_INTERN(reg, REG_ZERO, EXCEPTION_HARDWARE_ARITHMETIC);
337 /* emit_arrayindexoutofbounds_check ********************************************
339 Emit an ArrayIndexOutOfBoundsException check.
341 *******************************************************************************/
343 void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
345 if (INSTRUCTION_MUST_CHECK(iptr)) {
346 M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
347 M_CMPULT(s2, REG_ITMP3, REG_ITMP3);
348 M_BNEZ(REG_ITMP3, 1);
349 M_ALD_INTERN(s2, REG_ZERO, EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
354 /* emit_classcast_check ********************************************************
356 Emit a ClassCastException check.
358 *******************************************************************************/
360 void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
362 if (INSTRUCTION_MUST_CHECK(iptr)) {
371 vm_abort("emit_classcast_check: unknown condition %d", condition);
373 M_ALD_INTERN(s1, REG_ZERO, EXCEPTION_HARDWARE_CLASSCAST);
378 /* emit_nullpointer_check ******************************************************
380 Emit a NullPointerException check.
382 *******************************************************************************/
384 void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg)
386 if (INSTRUCTION_MUST_CHECK(iptr)) {
388 /* Destination register must not be REG_ZERO, because then no
389 SIGSEGV is thrown. */
390 M_ALD_INTERN(reg, REG_ZERO, EXCEPTION_HARDWARE_NULLPOINTER);
395 /* emit_exception_check ********************************************************
397 Emit an Exception check.
399 *******************************************************************************/
401 void emit_exception_check(codegendata *cd, instruction *iptr)
403 if (INSTRUCTION_MUST_CHECK(iptr)) {
404 M_BNEZ(REG_RESULT, 1);
405 /* Destination register must not be REG_ZERO, because then no
406 SIGSEGV is thrown. */
407 M_ALD_INTERN(REG_RESULT, REG_ZERO, EXCEPTION_HARDWARE_EXCEPTION);
412 /* emit_patcher_stubs **********************************************************
414 Generates the code for the patcher stubs.
416 *******************************************************************************/
418 void emit_patcher_stubs(jitdata *jd)
428 /* get required compiler data */
432 /* generate code patching stub call code */
436 for (pref = cd->patchrefs; pref != NULL; pref = pref->next) {
437 /* check code segment size */
441 /* Get machine code which is patched back in later. The
442 call is 1 instruction word long. */
444 tmpmcodeptr = (u1 *) (cd->mcodebase + pref->branchpos);
446 mcode = *((u4 *) tmpmcodeptr);
448 /* Patch in the call to call the following code (done at
451 savedmcodeptr = cd->mcodeptr; /* save current mcodeptr */
452 cd->mcodeptr = tmpmcodeptr; /* set mcodeptr to patch position */
454 disp = ((u4 *) savedmcodeptr) - (((u4 *) tmpmcodeptr) + 1);
455 M_BSR(REG_ITMP3, disp);
457 cd->mcodeptr = savedmcodeptr; /* restore the current mcodeptr */
459 /* create stack frame */
461 M_LSUB_IMM(REG_SP, 6 * 8, REG_SP);
463 /* move return address onto stack */
465 M_AST(REG_ITMP3, REG_SP, 5 * 8);
467 /* move pointer to java_objectheader onto stack */
469 #if defined(ENABLE_THREADS)
470 /* create a virtual java_objectheader */
472 (void) dseg_add_unique_address(cd, NULL); /* flcword */
473 (void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
474 disp = dseg_add_unique_address(cd, NULL); /* vftbl */
476 M_LDA(REG_ITMP3, REG_PV, disp);
477 M_AST(REG_ITMP3, REG_SP, 4 * 8);
482 /* move machine code onto stack */
484 disp = dseg_add_s4(cd, mcode);
485 M_ILD(REG_ITMP3, REG_PV, disp);
486 M_IST(REG_ITMP3, REG_SP, 3 * 8);
488 /* move class/method/field reference onto stack */
490 disp = dseg_add_address(cd, pref->ref);
491 M_ALD(REG_ITMP3, REG_PV, disp);
492 M_AST(REG_ITMP3, REG_SP, 2 * 8);
494 /* move data segment displacement onto stack */
496 disp = dseg_add_s4(cd, pref->disp);
497 M_ILD(REG_ITMP3, REG_PV, disp);
498 M_IST(REG_ITMP3, REG_SP, 1 * 8);
500 /* move patcher function pointer onto stack */
502 disp = dseg_add_functionptr(cd, pref->patcher);
503 M_ALD(REG_ITMP3, REG_PV, disp);
504 M_AST(REG_ITMP3, REG_SP, 0 * 8);
506 if (targetdisp == 0) {
507 targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
509 disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
510 M_ALD(REG_ITMP3, REG_PV, disp);
511 M_JMP(REG_ZERO, REG_ITMP3);
514 disp = (((u4 *) cd->mcodebase) + targetdisp) -
515 (((u4 *) cd->mcodeptr) + 1);
523 /* emit_replacement_stubs ******************************************************
525 Generates the code for the replacement stubs.
527 *******************************************************************************/
529 #if defined(ENABLE_REPLACEMENT)
530 void emit_replacement_stubs(jitdata *jd)
541 /* get required compiler data */
546 rplp = code->rplpoints;
548 /* store beginning of replacement stubs */
550 code->replacementstubs = (u1*) (cd->mcodeptr - cd->mcodebase);
552 for (i = 0; i < code->rplpointcount; ++i, ++rplp) {
553 /* do not generate stubs for non-trappable points */
555 if (rplp->flags & RPLPOINT_FLAG_NOTRAP)
558 /* check code segment size */
563 savedmcodeptr = cd->mcodeptr;
566 /* create stack frame - 16-byte aligned */
568 M_LSUB_IMM(REG_SP, 2 * 8, REG_SP);
570 /* push address of `rplpoint` struct */
572 disp = dseg_add_address(cd, rplp);
573 M_ALD(REG_ITMP3, REG_PV, disp);
574 M_AST(REG_ITMP3, REG_SP, 0 * 8);
576 /* jump to replacement function */
578 disp = dseg_add_functionptr(cd, asm_replacement_out);
579 M_ALD(REG_ITMP3, REG_PV, disp);
580 M_JMP(REG_ZERO, REG_ITMP3);
582 assert((cd->mcodeptr - savedmcodeptr) == 4*REPLACEMENT_STUB_SIZE);
585 #endif /* defined(ENABLE_REPLACEMENT) */
588 /* emit_verbosecall_enter ******************************************************
590 Generates the code for the call trace.
592 *******************************************************************************/
595 void emit_verbosecall_enter(jitdata *jd)
604 /* get required compiler data */
612 /* mark trace code */
616 M_LDA(REG_SP, REG_SP, -((ARG_CNT + TMP_CNT + 2) * 8));
617 M_AST(REG_RA, REG_SP, 1 * 8);
619 /* save argument registers */
621 for (i = 0; i < INT_ARG_CNT; i++)
622 M_LST(abi_registers_integer_argument[i], REG_SP, (2 + i) * 8);
624 for (i = 0; i < FLT_ARG_CNT; i++)
625 M_DST(abi_registers_float_argument[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
627 /* save temporary registers for leaf methods */
629 if (jd->isleafmethod) {
630 for (i = 0; i < INT_TMP_CNT; i++)
631 M_LST(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
633 for (i = 0; i < FLT_TMP_CNT; i++)
634 M_DST(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
637 /* load float arguments into integer registers */
639 for (i = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
640 t = md->paramtypes[i].type;
642 if (IS_FLT_DBL_TYPE(t)) {
643 if (IS_2_WORD_TYPE(t)) {
644 M_DST(abi_registers_float_argument[i], REG_SP, 0 * 8);
645 M_LLD(abi_registers_integer_argument[i], REG_SP, 0 * 8);
648 M_FST(abi_registers_float_argument[i], REG_SP, 0 * 8);
649 M_ILD(abi_registers_integer_argument[i], REG_SP, 0 * 8);
654 disp = dseg_add_address(cd, m);
655 M_ALD(REG_ITMP1, REG_PV, disp);
656 M_AST(REG_ITMP1, REG_SP, 0 * 8);
657 disp = dseg_add_functionptr(cd, builtin_verbosecall_enter);
658 M_ALD(REG_PV, REG_PV, disp);
659 M_JSR(REG_RA, REG_PV);
660 disp = (s4) (cd->mcodeptr - cd->mcodebase);
661 M_LDA(REG_PV, REG_RA, -disp);
662 M_ALD(REG_RA, REG_SP, 1 * 8);
664 /* restore argument registers */
666 for (i = 0; i < INT_ARG_CNT; i++)
667 M_LLD(abi_registers_integer_argument[i], REG_SP, (2 + i) * 8);
669 for (i = 0; i < FLT_ARG_CNT; i++)
670 M_DLD(abi_registers_float_argument[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
672 /* restore temporary registers for leaf methods */
674 if (jd->isleafmethod) {
675 for (i = 0; i < INT_TMP_CNT; i++)
676 M_LLD(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
678 for (i = 0; i < FLT_TMP_CNT; i++)
679 M_DLD(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
682 M_LDA(REG_SP, REG_SP, (ARG_CNT + TMP_CNT + 2) * 8);
684 /* mark trace code */
688 #endif /* !defined(NDEBUG) */
691 /* emit_verbosecall_exit *******************************************************
693 Generates the code for the call trace.
695 void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m);
697 *******************************************************************************/
700 void emit_verbosecall_exit(jitdata *jd)
707 /* get required compiler data */
713 /* mark trace code */
717 M_ASUB_IMM(REG_SP, 4 * 8, REG_SP);
718 M_AST(REG_RA, REG_SP, 0 * 8);
720 M_LST(REG_RESULT, REG_SP, 1 * 8);
721 M_DST(REG_FRESULT, REG_SP, 2 * 8);
723 M_MOV(REG_RESULT, REG_A0);
724 M_FMOV(REG_FRESULT, REG_FA1);
725 M_FMOV(REG_FRESULT, REG_FA2);
727 disp = dseg_add_address(cd, m);
728 M_ALD(REG_A3, REG_PV, disp);
730 disp = dseg_add_functionptr(cd, builtin_verbosecall_exit);
731 M_ALD(REG_PV, REG_PV, disp);
732 M_JSR(REG_RA, REG_PV);
733 disp = (cd->mcodeptr - cd->mcodebase);
734 M_LDA(REG_PV, REG_RA, -disp);
736 M_DLD(REG_FRESULT, REG_SP, 2 * 8);
737 M_LLD(REG_RESULT, REG_SP, 1 * 8);
739 M_ALD(REG_RA, REG_SP, 0 * 8);
740 M_AADD_IMM(REG_SP, 4 * 8, REG_SP);
742 /* mark trace code */
746 #endif /* !defined(NDEBUG) */
750 * These are local overrides for various environment variables in Emacs.
751 * Please do not remove this and leave it at the end of the file, where
752 * Emacs will automagically detect them.
753 * ---------------------------------------------------------------------
756 * indent-tabs-mode: t
760 * vim:noexpandtab:sw=4:ts=4: