1 /* src/vm/jit/mips/emit.c - MIPS code emitter functions
3 Copyright (C) 1996-2005, 2006 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 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
31 $Id: emitfuncs.c 4398 2006-01-31 23:43:08Z twisti $
43 #include "vm/jit/mips/codegen.h"
45 #if defined(ENABLE_THREADS)
46 # include "threads/native/lock.h"
49 #include "vm/exceptions.h"
50 #include "vm/options.h"
51 #include "vm/stringlocal.h" /* XXX for gen_resolvebranch */
52 #include "vm/jit/abi-asm.h"
53 #include "vm/jit/asmpart.h"
54 #include "vm/jit/dseg.h"
55 #include "vm/jit/emit-common.h"
56 #include "vm/jit/jit.h"
57 #include "vm/jit/replace.h"
60 /* emit_load *******************************************************************
62 Emits a possible load of an operand.
64 *******************************************************************************/
66 s4 emit_load(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
72 /* get required compiler data */
76 if (src->flags & INMEMORY) {
79 disp = src->vv.regoff * 8;
81 if (IS_FLT_DBL_TYPE(src->type)) {
82 if (IS_2_WORD_TYPE(src->type))
83 M_DLD(tempreg, REG_SP, disp);
85 M_FLD(tempreg, REG_SP, disp);
88 M_LLD(tempreg, REG_SP, disp);
99 /* emit_store ******************************************************************
101 Emits a possible store to variable.
103 *******************************************************************************/
105 void emit_store(jitdata *jd, instruction *iptr, varinfo *dst, s4 d)
110 /* get required compiler data */
114 if (dst->flags & INMEMORY) {
117 disp = dst->vv.regoff * 8;
119 if (IS_FLT_DBL_TYPE(dst->type)) {
120 if (IS_2_WORD_TYPE(dst->type))
121 M_DST(d, REG_SP, disp);
123 M_FST(d, REG_SP, disp);
126 M_LST(d, REG_SP, disp);
131 /* emit_copy *******************************************************************
133 Generates a register/memory to register/memory copy.
135 *******************************************************************************/
137 void emit_copy(jitdata *jd, instruction *iptr, varinfo *src, varinfo *dst)
142 /* get required compiler data */
146 if ((src->vv.regoff != dst->vv.regoff) ||
147 ((src->flags ^ dst->flags) & INMEMORY)) {
149 /* If one of the variables resides in memory, we can eliminate
150 the register move from/to the temporary register with the
151 order of getting the destination register and the load. */
153 if (IS_INMEMORY(src->flags)) {
154 d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
155 s1 = emit_load(jd, iptr, src, d);
158 s1 = emit_load(jd, iptr, src, REG_IFTMP);
159 d = codegen_reg_of_var(iptr->opc, dst, s1);
163 if (IS_FLT_DBL_TYPE(src->type)) {
164 if (IS_2_WORD_TYPE(src->type))
173 emit_store(jd, iptr, dst, d);
178 /* emit_iconst *****************************************************************
182 *******************************************************************************/
184 void emit_iconst(codegendata *cd, s4 d, s4 value)
188 if ((value >= -32768) && (value <= 32767))
189 M_IADD_IMM(REG_ZERO, value, d);
190 else if ((value >= 0) && (value <= 0xffff))
191 M_OR_IMM(REG_ZERO, value, d);
193 disp = dseg_add_s4(cd, value);
194 M_ILD(d, REG_PV, disp);
199 /* emit_lconst *****************************************************************
203 *******************************************************************************/
205 void emit_lconst(codegendata *cd, s4 d, s8 value)
209 if ((value >= -32768) && (value <= 32767))
210 M_LADD_IMM(REG_ZERO, value, d);
211 else if ((value >= 0) && (value <= 0xffff))
212 M_OR_IMM(REG_ZERO, value, d);
214 disp = dseg_add_s8(cd, value);
215 M_LLD(d, REG_PV, disp);
220 /* emit_arithmetic_check *******************************************************
222 Emit an ArithmeticException check.
224 *******************************************************************************/
226 void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
228 if (INSTRUCTION_MUST_CHECK(iptr)) {
231 codegen_add_arithmeticexception_ref(cd);
238 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
239 codegen_add_arithmeticexception_ref(cd);
240 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
248 /* emit_arrayindexoutofbounds_check ********************************************
250 Emit an ArrayIndexOutOfBoundsException check.
252 *******************************************************************************/
254 void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
256 if (INSTRUCTION_MUST_CHECK(iptr)) {
257 M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
258 M_CMPULT(s2, REG_ITMP3, REG_ITMP3);
261 M_BEQZ(REG_ITMP3, 0);
262 codegen_add_arrayindexoutofboundsexception_ref(cd, s2);
265 M_BNEZ(REG_ITMP3, 6);
269 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
270 codegen_add_arrayindexoutofboundsexception_ref(cd, s2);
271 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
279 /* emit_arraystore_check *******************************************************
281 Emit an ArrayStoreException check.
283 *******************************************************************************/
285 void emit_arraystore_check(codegendata *cd, instruction *iptr, s4 reg)
287 if (INSTRUCTION_MUST_CHECK(iptr)) {
290 codegen_add_arraystoreexception_ref(cd);
297 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
298 codegen_add_arraystoreexception_ref(cd);
299 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
307 /* emit_classcast_check ********************************************************
309 Emit a ClassCastException check.
311 *******************************************************************************/
313 void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
315 if (INSTRUCTION_MUST_CHECK(iptr)) {
318 codegen_add_classcastexception_ref(cd, s1);
335 vm_abort("emit_classcast_check: condition %d not found", condition);
341 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
342 codegen_add_classcastexception_ref(cd, s1);
343 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
351 /* emit_nullpointer_check ******************************************************
353 Emit a NullPointerException check.
355 *******************************************************************************/
357 void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg)
359 if (INSTRUCTION_MUST_CHECK(iptr)) {
362 codegen_add_nullpointerexception_ref(cd);
369 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
370 codegen_add_nullpointerexception_ref(cd);
371 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
379 /* emit_exception_check ********************************************************
381 Emit an Exception check.
383 *******************************************************************************/
385 void emit_exception_check(codegendata *cd, instruction *iptr)
387 if (INSTRUCTION_MUST_CHECK(iptr)) {
389 M_BEQZ(REG_RESULT, 0);
390 codegen_add_fillinstacktrace_ref(cd);
393 M_BNEZ(REG_RESULT, 6);
397 M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
398 codegen_add_fillinstacktrace_ref(cd);
399 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
407 /* emit_exception_stubs ********************************************************
409 Generates the code for the exception stubs.
411 *******************************************************************************/
413 void emit_exception_stubs(jitdata *jd)
423 /* get required compiler data */
428 /* generate exception stubs */
432 for (er = cd->exceptionrefs; er != NULL; er = er->next) {
433 /* back-patch the branch to this exception code */
435 branchmpc = er->branchpos;
436 targetmpc = cd->mcodeptr - cd->mcodebase;
438 md_codegen_patch_branch(cd, branchmpc, targetmpc);
442 /* Check if the exception is an
443 ArrayIndexOutOfBoundsException. If so, move index register
447 M_MOV(er->reg, REG_ITMP1);
449 /* calcuate exception address */
451 M_LDA(REG_ITMP2_XPC, REG_PV, er->branchpos - 4);
453 /* move function to call into REG_ITMP3 */
455 disp = dseg_add_functionptr(cd, er->function);
456 M_ALD(REG_ITMP3, REG_PV, disp);
458 if (targetdisp == 0) {
459 targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
461 M_MOV(REG_PV, REG_A0);
462 M_MOV(REG_SP, REG_A1);
464 if (jd->isleafmethod)
465 M_MOV(REG_RA, REG_A2);
467 M_ALD(REG_A2, REG_SP, (cd->stackframesize - 1) * 8);
469 M_MOV(REG_ITMP2_XPC, REG_A3);
470 M_MOV(REG_ITMP1, REG_A4);
472 M_ASUB_IMM(REG_SP, 2 * 8, REG_SP);
473 M_AST(REG_ITMP2_XPC, REG_SP, 0 * 8);
475 if (jd->isleafmethod)
476 M_AST(REG_RA, REG_SP, 1 * 8);
478 M_JSR(REG_RA, REG_ITMP3);
480 M_MOV(REG_RESULT, REG_ITMP1_XPTR);
482 if (jd->isleafmethod)
483 M_ALD(REG_RA, REG_SP, 1 * 8);
485 M_ALD(REG_ITMP2_XPC, REG_SP, 0 * 8);
486 M_AADD_IMM(REG_SP, 2 * 8, REG_SP);
488 disp = dseg_add_functionptr(cd, asm_handle_exception);
489 M_ALD(REG_ITMP3, REG_PV, disp);
494 disp = (((u4 *) cd->mcodebase) + targetdisp) -
495 (((u4 *) cd->mcodeptr) + 1);
504 /* emit_patcher_stubs **********************************************************
506 Generates the code for the patcher stubs.
508 *******************************************************************************/
510 void emit_patcher_stubs(jitdata *jd)
520 /* get required compiler data */
524 /* generate code patching stub call code */
528 /* for (pr = list_first_unsynced(cd->patchrefs); pr != NULL; */
529 /* pr = list_next_unsynced(cd->patchrefs, pr)) { */
530 for (pr = cd->patchrefs; pr != NULL; pr = pr->next) {
531 /* check code segment size */
535 /* Get machine code which is patched back in later. The
536 call is 2 instruction words long. */
538 tmpmcodeptr = (u1 *) (cd->mcodebase + pr->branchpos);
540 /* We use 2 loads here as an unaligned 8-byte read on 64-bit
541 MIPS causes a SIGSEGV and using the same code for both
542 architectures is much better. */
544 mcode[0] = ((u4 *) tmpmcodeptr)[0];
545 mcode[1] = ((u4 *) tmpmcodeptr)[1];
547 mcode[2] = ((u4 *) tmpmcodeptr)[2];
548 mcode[3] = ((u4 *) tmpmcodeptr)[3];
549 mcode[4] = ((u4 *) tmpmcodeptr)[4];
551 /* Patch in the call to call the following code (done at
554 savedmcodeptr = cd->mcodeptr; /* save current mcodeptr */
555 cd->mcodeptr = tmpmcodeptr; /* set mcodeptr to patch position */
557 disp = ((u4 *) savedmcodeptr) - (((u4 *) tmpmcodeptr) + 1);
559 /* if ((disp < (s4) 0xffff8000) || (disp > (s4) 0x00007fff)) { */
560 /* Recalculate the displacement to be relative to PV. */
562 disp = savedmcodeptr - cd->mcodebase;
564 M_LUI(REG_ITMP3, disp >> 16);
565 M_OR_IMM(REG_ITMP3, disp, REG_ITMP3);
566 M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
578 cd->mcodeptr = savedmcodeptr; /* restore the current mcodeptr */
580 /* create stack frame */
582 M_ASUB_IMM(REG_SP, 8 * 8, REG_SP);
584 /* calculate return address and move it onto the stack */
586 M_LDA(REG_ITMP3, REG_PV, pr->branchpos);
587 M_AST(REG_ITMP3, REG_SP, 7 * 8);
589 /* move pointer to java_objectheader onto stack */
591 #if defined(ENABLE_THREADS)
592 /* create a virtual java_objectheader */
594 (void) dseg_add_unique_address(cd, NULL); /* flcword */
595 (void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
596 disp = dseg_add_unique_address(cd, NULL); /* vftbl */
598 M_LDA(REG_ITMP3, REG_PV, disp);
599 M_AST(REG_ITMP3, REG_SP, 6 * 8);
604 /* move machine code onto stack */
606 disp = dseg_add_s4(cd, mcode[0]);
607 M_ILD(REG_ITMP3, REG_PV, disp);
608 M_IST(REG_ITMP3, REG_SP, 3 * 8 + 0);
610 disp = dseg_add_s4(cd, mcode[1]);
611 M_ILD(REG_ITMP3, REG_PV, disp);
612 M_IST(REG_ITMP3, REG_SP, 3 * 8 + 4);
614 disp = dseg_add_s4(cd, mcode[2]);
615 M_ILD(REG_ITMP3, REG_PV, disp);
616 M_IST(REG_ITMP3, REG_SP, 4 * 8 + 0);
618 disp = dseg_add_s4(cd, mcode[3]);
619 M_ILD(REG_ITMP3, REG_PV, disp);
620 M_IST(REG_ITMP3, REG_SP, 4 * 8 + 4);
622 disp = dseg_add_s4(cd, mcode[4]);
623 M_ILD(REG_ITMP3, REG_PV, disp);
624 M_IST(REG_ITMP3, REG_SP, 5 * 8 + 0);
626 /* move class/method/field reference onto stack */
628 disp = dseg_add_address(cd, pr->ref);
629 M_ALD(REG_ITMP3, REG_PV, disp);
630 M_AST(REG_ITMP3, REG_SP, 2 * 8);
632 /* move data segment displacement onto stack */
634 disp = dseg_add_s4(cd, pr->disp);
635 M_ILD(REG_ITMP3, REG_PV, disp);
636 M_IST(REG_ITMP3, REG_SP, 1 * 8);
638 /* move patcher function pointer onto stack */
640 disp = dseg_add_address(cd, pr->patcher);
641 M_ALD(REG_ITMP3, REG_PV, disp);
642 M_AST(REG_ITMP3, REG_SP, 0 * 8);
644 if (targetdisp == 0) {
645 targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
647 disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
648 M_ALD(REG_ITMP3, REG_PV, disp);
653 disp = (((u4 *) cd->mcodebase) + targetdisp) -
654 (((u4 *) cd->mcodeptr) + 1);
663 /* emit_replacement_stubs ******************************************************
665 Generates the code for the replacement stubs.
667 *******************************************************************************/
669 #if defined(ENABLE_REPLACEMENT)
670 void emit_replacement_stubs(jitdata *jd)
681 /* get required compiler data */
686 rplp = code->rplpoints;
688 /* store beginning of replacement stubs */
690 code->replacementstubs = (u1*) (cd->mcodeptr - cd->mcodebase);
692 for (i = 0; i < code->rplpointcount; ++i, ++rplp) {
693 /* do not generate stubs for non-trappable points */
695 if (rplp->flags & RPLPOINT_FLAG_NOTRAP)
698 /* check code segment size */
703 savedmcodeptr = cd->mcodeptr;
706 /* create stack frame - 16-byte aligned */
708 M_ASUB_IMM(REG_SP, 2 * 8, REG_SP);
710 /* push address of `rplpoint` struct */
712 disp = dseg_add_address(cd, rplp);
713 M_ALD(REG_ITMP3, REG_PV, disp);
714 M_AST(REG_ITMP3, REG_SP, 0 * 8);
716 /* jump to replacement function */
718 disp = dseg_add_functionptr(cd, asm_replacement_out);
719 M_ALD(REG_ITMP3, REG_PV, disp);
721 M_NOP; /* delay slot */
723 assert((cd->mcodeptr - savedmcodeptr) == 4*REPLACEMENT_STUB_SIZE);
726 #endif /* defined(ENABLE_REPLACEMENT) */
729 /* emit_verbosecall_enter ******************************************************
731 Generates the code for the call trace.
733 *******************************************************************************/
736 void emit_verbosecall_enter(jitdata *jd)
745 /* get required compiler data */
753 /* mark trace code */
757 M_LDA(REG_SP, REG_SP, -(2 + ARG_CNT + TMP_CNT) * 8);
758 M_AST(REG_RA, REG_SP, 1 * 8);
760 /* save argument registers */
762 for (i = 0; i < INT_ARG_CNT; i++)
763 M_LST(rd->argintregs[i], REG_SP, (2 + i) * 8);
765 for (i = 0; i < FLT_ARG_CNT; i++)
766 M_DST(rd->argfltregs[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
768 /* save temporary registers for leaf methods */
770 if (jd->isleafmethod) {
771 for (i = 0; i < INT_TMP_CNT; i++)
772 M_LST(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
774 for (i = 0; i < FLT_TMP_CNT; i++)
775 M_DST(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
778 /* load float arguments into integer registers */
780 for (i = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
781 t = md->paramtypes[i].type;
783 if (IS_FLT_DBL_TYPE(t)) {
784 if (IS_2_WORD_TYPE(t)) {
785 M_DST(rd->argfltregs[i], REG_SP, 0 * 8);
786 M_LLD(rd->argintregs[i], REG_SP, 0 * 8);
789 M_FST(rd->argfltregs[i], REG_SP, 0 * 8);
790 M_ILD(rd->argintregs[i], REG_SP, 0 * 8);
795 disp = dseg_add_address(cd, m);
796 M_ALD(REG_ITMP1, REG_PV, disp);
797 M_AST(REG_ITMP1, REG_SP, 0 * 8);
798 disp = dseg_add_functionptr(cd, builtin_trace_args);
799 M_ALD(REG_ITMP3, REG_PV, disp);
800 M_JSR(REG_RA, REG_ITMP3);
803 /* restore argument registers */
805 for (i = 0; i < INT_ARG_CNT; i++)
806 M_LLD(rd->argintregs[i], REG_SP, (2 + i) * 8);
808 for (i = 0; i < FLT_ARG_CNT; i++)
809 M_DLD(rd->argfltregs[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
811 /* restore temporary registers for leaf methods */
813 if (jd->isleafmethod) {
814 for (i = 0; i < INT_TMP_CNT; i++)
815 M_LLD(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
817 for (i = 0; i < FLT_TMP_CNT; i++)
818 M_DLD(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
821 M_ALD(REG_RA, REG_SP, 1 * 8);
822 M_LDA(REG_SP, REG_SP, (2 + ARG_CNT + TMP_CNT) * 8);
824 /* mark trace code */
828 #endif /* !defined(NDEBUG) */
831 /* emit_verbosecall_exit *******************************************************
833 Generates the code for the call trace.
835 *******************************************************************************/
838 void emit_verbosecall_exit(jitdata *jd)
845 /* get required compiler data */
851 /* mark trace code */
855 M_LDA(REG_SP, REG_SP, -4 * 8); /* keep stack 16-byte aligned */
856 M_LST(REG_RA, REG_SP, 0 * 8);
858 M_LST(REG_RESULT, REG_SP, 1 * 8);
859 M_DST(REG_FRESULT, REG_SP, 2 * 8);
861 disp = dseg_add_address(cd, m);
862 M_ALD(rd->argintregs[0], REG_PV, disp);
864 M_MOV(REG_RESULT, rd->argintregs[1]);
865 M_DMOV(REG_FRESULT, rd->argfltregs[2]);
866 M_FMOV(REG_FRESULT, rd->argfltregs[3]);
868 disp = dseg_add_functionptr(cd, builtin_displaymethodstop);
869 M_ALD(REG_ITMP3, REG_PV, disp);
870 M_JSR(REG_RA, REG_ITMP3);
873 M_DLD(REG_FRESULT, REG_SP, 2 * 8);
874 M_LLD(REG_RESULT, REG_SP, 1 * 8);
876 M_LLD(REG_RA, REG_SP, 0 * 8);
877 M_LDA(REG_SP, REG_SP, 4 * 8);
879 /* mark trace code */
883 #endif /* !defined(NDEBUG) */
887 * These are local overrides for various environment variables in Emacs.
888 * Please do not remove this and leave it at the end of the file, where
889 * Emacs will automagically detect them.
890 * ---------------------------------------------------------------------
893 * indent-tabs-mode: t
897 * vim:noexpandtab:sw=4:ts=4: