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, varinfo *src, varinfo *dst)
151 /* get required compiler data */
155 if ((src->vv.regoff != dst->vv.regoff) ||
156 ((src->flags ^ dst->flags) & INMEMORY)) {
158 /* If one of the variables resides in memory, we can eliminate
159 the register move from/to the temporary register with the
160 order of getting the destination register and the load. */
162 if (IS_INMEMORY(src->flags)) {
163 d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
164 s1 = emit_load(jd, iptr, src, d);
167 s1 = emit_load(jd, iptr, src, REG_IFTMP);
168 d = codegen_reg_of_var(iptr->opc, dst, s1);
183 vm_abort("emit_copy: unknown type %d", src->type);
187 emit_store(jd, iptr, dst, d);
192 /* emit_iconst *****************************************************************
196 *******************************************************************************/
198 void emit_iconst(codegendata *cd, s4 d, s4 value)
202 if ((value >= -32768) && (value <= 32767))
203 M_LDA_INTERN(d, REG_ZERO, value);
205 disp = dseg_add_s4(cd, value);
206 M_ILD(d, REG_PV, disp);
211 /* emit_lconst *****************************************************************
215 *******************************************************************************/
217 void emit_lconst(codegendata *cd, s4 d, s8 value)
221 if ((value >= -32768) && (value <= 32767))
222 M_LDA_INTERN(d, REG_ZERO, value);
224 disp = dseg_add_s8(cd, value);
225 M_LLD(d, REG_PV, disp);
230 /* emit_branch *****************************************************************
232 Emits the code for conditional and unconditional branchs.
234 *******************************************************************************/
236 void emit_branch(codegendata *cd, s4 disp, s4 condition, s4 reg, u4 opt)
241 /* calculate the different displacements */
243 checkdisp = (disp - 4);
244 branchdisp = (disp - 4) >> 2;
246 /* check which branch to generate */
248 if (condition == BRANCH_UNCONDITIONAL) {
249 /* check displacement for overflow */
251 if ((checkdisp < (s4) 0xffe00000) || (checkdisp > (s4) 0x001fffff)) {
252 /* if the long-branches flag isn't set yet, do it */
254 if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
255 log_println("setting error");
256 cd->flags |= (CODEGENDATA_FLAG_ERROR |
257 CODEGENDATA_FLAG_LONGBRANCHES);
260 vm_abort("emit_branch: emit unconditional long-branch code");
267 /* and displacement for overflow */
269 if ((checkdisp < (s4) 0xffe00000) || (checkdisp > (s4) 0x001fffff)) {
270 /* if the long-branches flag isn't set yet, do it */
272 if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
273 log_println("setting error");
274 cd->flags |= (CODEGENDATA_FLAG_ERROR |
275 CODEGENDATA_FLAG_LONGBRANCHES);
278 vm_abort("emit_branch: emit conditional long-branch code");
283 M_BEQZ(reg, branchdisp);
286 M_BNEZ(reg, branchdisp);
289 M_BLTZ(reg, branchdisp);
292 M_BGEZ(reg, branchdisp);
295 M_BGTZ(reg, branchdisp);
298 M_BLEZ(reg, branchdisp);
301 vm_abort("emit_branch: unknown condition %d", condition);
308 /* emit_arithmetic_check *******************************************************
310 Emit an ArithmeticException check.
312 *******************************************************************************/
314 void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
316 if (INSTRUCTION_MUST_CHECK(iptr)) {
318 /* Destination register must not be REG_ZERO, because then no
319 SIGSEGV is thrown. */
320 M_ALD_INTERN(reg, REG_ZERO, EXCEPTION_HARDWARE_ARITHMETIC);
325 /* emit_arrayindexoutofbounds_check ********************************************
327 Emit an ArrayIndexOutOfBoundsException check.
329 *******************************************************************************/
331 void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
333 if (INSTRUCTION_MUST_CHECK(iptr)) {
334 M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
335 M_CMPULT(s2, REG_ITMP3, REG_ITMP3);
336 M_BNEZ(REG_ITMP3, 1);
337 M_ALD_INTERN(s2, REG_ZERO, EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
342 /* emit_classcast_check ********************************************************
344 Emit a ClassCastException check.
346 *******************************************************************************/
348 void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
350 if (INSTRUCTION_MUST_CHECK(iptr)) {
359 vm_abort("emit_classcast_check: unknown condition %d", condition);
361 M_ALD_INTERN(s1, REG_ZERO, EXCEPTION_HARDWARE_CLASSCAST);
366 /* emit_nullpointer_check ******************************************************
368 Emit a NullPointerException check.
370 *******************************************************************************/
372 void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg)
374 if (INSTRUCTION_MUST_CHECK(iptr)) {
376 /* Destination register must not be REG_ZERO, because then no
377 SIGSEGV is thrown. */
378 M_ALD_INTERN(reg, REG_ZERO, EXCEPTION_HARDWARE_NULLPOINTER);
383 /* emit_exception_check ********************************************************
385 Emit an Exception check.
387 *******************************************************************************/
389 void emit_exception_check(codegendata *cd, instruction *iptr)
391 if (INSTRUCTION_MUST_CHECK(iptr)) {
392 M_BNEZ(REG_RESULT, 1);
393 /* Destination register must not be REG_ZERO, because then no
394 SIGSEGV is thrown. */
395 M_ALD_INTERN(REG_RESULT, REG_ZERO, EXCEPTION_HARDWARE_EXCEPTION);
400 /* emit_patcher_stubs **********************************************************
402 Generates the code for the patcher stubs.
404 *******************************************************************************/
406 void emit_patcher_stubs(jitdata *jd)
416 /* get required compiler data */
420 /* generate code patching stub call code */
424 for (pref = cd->patchrefs; pref != NULL; pref = pref->next) {
425 /* check code segment size */
429 /* Get machine code which is patched back in later. The
430 call is 1 instruction word long. */
432 tmpmcodeptr = (u1 *) (cd->mcodebase + pref->branchpos);
434 mcode = *((u4 *) tmpmcodeptr);
436 /* Patch in the call to call the following code (done at
439 savedmcodeptr = cd->mcodeptr; /* save current mcodeptr */
440 cd->mcodeptr = tmpmcodeptr; /* set mcodeptr to patch position */
442 disp = ((u4 *) savedmcodeptr) - (((u4 *) tmpmcodeptr) + 1);
443 M_BSR(REG_ITMP3, disp);
445 cd->mcodeptr = savedmcodeptr; /* restore the current mcodeptr */
447 /* create stack frame */
449 M_LSUB_IMM(REG_SP, 6 * 8, REG_SP);
451 /* move return address onto stack */
453 M_AST(REG_ITMP3, REG_SP, 5 * 8);
455 /* move pointer to java_objectheader onto stack */
457 #if defined(ENABLE_THREADS)
458 /* create a virtual java_objectheader */
460 (void) dseg_add_unique_address(cd, NULL); /* flcword */
461 (void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
462 disp = dseg_add_unique_address(cd, NULL); /* vftbl */
464 M_LDA(REG_ITMP3, REG_PV, disp);
465 M_AST(REG_ITMP3, REG_SP, 4 * 8);
470 /* move machine code onto stack */
472 disp = dseg_add_s4(cd, mcode);
473 M_ILD(REG_ITMP3, REG_PV, disp);
474 M_IST(REG_ITMP3, REG_SP, 3 * 8);
476 /* move class/method/field reference onto stack */
478 disp = dseg_add_address(cd, pref->ref);
479 M_ALD(REG_ITMP3, REG_PV, disp);
480 M_AST(REG_ITMP3, REG_SP, 2 * 8);
482 /* move data segment displacement onto stack */
484 disp = dseg_add_s4(cd, pref->disp);
485 M_ILD(REG_ITMP3, REG_PV, disp);
486 M_IST(REG_ITMP3, REG_SP, 1 * 8);
488 /* move patcher function pointer onto stack */
490 disp = dseg_add_functionptr(cd, pref->patcher);
491 M_ALD(REG_ITMP3, REG_PV, disp);
492 M_AST(REG_ITMP3, REG_SP, 0 * 8);
494 if (targetdisp == 0) {
495 targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
497 disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
498 M_ALD(REG_ITMP3, REG_PV, disp);
499 M_JMP(REG_ZERO, REG_ITMP3);
502 disp = (((u4 *) cd->mcodebase) + targetdisp) -
503 (((u4 *) cd->mcodeptr) + 1);
511 /* emit_replacement_stubs ******************************************************
513 Generates the code for the replacement stubs.
515 *******************************************************************************/
517 #if defined(ENABLE_REPLACEMENT)
518 void emit_replacement_stubs(jitdata *jd)
529 /* get required compiler data */
534 rplp = code->rplpoints;
536 /* store beginning of replacement stubs */
538 code->replacementstubs = (u1*) (cd->mcodeptr - cd->mcodebase);
540 for (i = 0; i < code->rplpointcount; ++i, ++rplp) {
541 /* do not generate stubs for non-trappable points */
543 if (rplp->flags & RPLPOINT_FLAG_NOTRAP)
546 /* check code segment size */
551 savedmcodeptr = cd->mcodeptr;
554 /* create stack frame - 16-byte aligned */
556 M_LSUB_IMM(REG_SP, 2 * 8, REG_SP);
558 /* push address of `rplpoint` struct */
560 disp = dseg_add_address(cd, rplp);
561 M_ALD(REG_ITMP3, REG_PV, disp);
562 M_AST(REG_ITMP3, REG_SP, 0 * 8);
564 /* jump to replacement function */
566 disp = dseg_add_functionptr(cd, asm_replacement_out);
567 M_ALD(REG_ITMP3, REG_PV, disp);
568 M_JMP(REG_ZERO, REG_ITMP3);
570 assert((cd->mcodeptr - savedmcodeptr) == 4*REPLACEMENT_STUB_SIZE);
573 #endif /* defined(ENABLE_REPLACEMENT) */
576 /* emit_verbosecall_enter ******************************************************
578 Generates the code for the call trace.
580 *******************************************************************************/
583 void emit_verbosecall_enter(jitdata *jd)
592 /* get required compiler data */
600 /* mark trace code */
604 M_LDA(REG_SP, REG_SP, -((ARG_CNT + TMP_CNT + 2) * 8));
605 M_AST(REG_RA, REG_SP, 1 * 8);
607 /* save argument registers */
609 for (i = 0; i < INT_ARG_CNT; i++)
610 M_LST(abi_registers_integer_argument[i], REG_SP, (2 + i) * 8);
612 for (i = 0; i < FLT_ARG_CNT; i++)
613 M_DST(abi_registers_float_argument[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
615 /* save temporary registers for leaf methods */
617 if (jd->isleafmethod) {
618 for (i = 0; i < INT_TMP_CNT; i++)
619 M_LST(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
621 for (i = 0; i < FLT_TMP_CNT; i++)
622 M_DST(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
625 /* load float arguments into integer registers */
627 for (i = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
628 t = md->paramtypes[i].type;
630 if (IS_FLT_DBL_TYPE(t)) {
631 if (IS_2_WORD_TYPE(t)) {
632 M_DST(abi_registers_float_argument[i], REG_SP, 0 * 8);
633 M_LLD(abi_registers_integer_argument[i], REG_SP, 0 * 8);
636 M_FST(abi_registers_float_argument[i], REG_SP, 0 * 8);
637 M_ILD(abi_registers_integer_argument[i], REG_SP, 0 * 8);
642 disp = dseg_add_address(cd, m);
643 M_ALD(REG_ITMP1, REG_PV, disp);
644 M_AST(REG_ITMP1, REG_SP, 0 * 8);
645 disp = dseg_add_functionptr(cd, builtin_verbosecall_enter);
646 M_ALD(REG_PV, REG_PV, disp);
647 M_JSR(REG_RA, REG_PV);
648 disp = (s4) (cd->mcodeptr - cd->mcodebase);
649 M_LDA(REG_PV, REG_RA, -disp);
650 M_ALD(REG_RA, REG_SP, 1 * 8);
652 /* restore argument registers */
654 for (i = 0; i < INT_ARG_CNT; i++)
655 M_LLD(abi_registers_integer_argument[i], REG_SP, (2 + i) * 8);
657 for (i = 0; i < FLT_ARG_CNT; i++)
658 M_DLD(abi_registers_float_argument[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);
660 /* restore temporary registers for leaf methods */
662 if (jd->isleafmethod) {
663 for (i = 0; i < INT_TMP_CNT; i++)
664 M_LLD(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);
666 for (i = 0; i < FLT_TMP_CNT; i++)
667 M_DLD(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
670 M_LDA(REG_SP, REG_SP, (ARG_CNT + TMP_CNT + 2) * 8);
672 /* mark trace code */
676 #endif /* !defined(NDEBUG) */
679 /* emit_verbosecall_exit *******************************************************
681 Generates the code for the call trace.
683 void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m);
685 *******************************************************************************/
688 void emit_verbosecall_exit(jitdata *jd)
695 /* get required compiler data */
701 /* mark trace code */
705 M_ASUB_IMM(REG_SP, 4 * 8, REG_SP);
706 M_AST(REG_RA, REG_SP, 0 * 8);
708 M_LST(REG_RESULT, REG_SP, 1 * 8);
709 M_DST(REG_FRESULT, REG_SP, 2 * 8);
711 M_MOV(REG_RESULT, REG_A0);
712 M_FMOV(REG_FRESULT, REG_FA1);
713 M_FMOV(REG_FRESULT, REG_FA2);
715 disp = dseg_add_address(cd, m);
716 M_ALD(REG_A3, REG_PV, disp);
718 disp = dseg_add_functionptr(cd, builtin_verbosecall_exit);
719 M_ALD(REG_PV, REG_PV, disp);
720 M_JSR(REG_RA, REG_PV);
721 disp = (cd->mcodeptr - cd->mcodebase);
722 M_LDA(REG_PV, REG_RA, -disp);
724 M_DLD(REG_FRESULT, REG_SP, 2 * 8);
725 M_LLD(REG_RESULT, REG_SP, 1 * 8);
727 M_ALD(REG_RA, REG_SP, 0 * 8);
728 M_AADD_IMM(REG_SP, 4 * 8, REG_SP);
730 /* mark trace code */
734 #endif /* !defined(NDEBUG) */
738 * These are local overrides for various environment variables in Emacs.
739 * Please do not remove this and leave it at the end of the file, where
740 * Emacs will automagically detect them.
741 * ---------------------------------------------------------------------
744 * indent-tabs-mode: t
748 * vim:noexpandtab:sw=4:ts=4: