1 /* src/vm/jit/m68k/emit.c
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: arch.h 5330 2006-09-05 18:43:12Z edwin $
35 #include "vm/jit/emit-common.h"
36 #include "vm/exceptions.h"
37 #include "vm/jit/asmpart.h"
39 #include "vm/builtin.h"
40 #include "mm/memory.h"
46 * Loads an immededat operand into data register
48 void emit_mov_imm_reg (codegendata *cd, s4 imm, s4 dreg)
50 if ((imm & 0x000000FF) == imm) {
52 *((s2*)cd->mcodeptr) = 0x7000 | (dreg << 9) | imm; /* MOVEQ.L */
54 } else if ((imm & 0xFFFF0000) != 0) {
56 OPWORD( ((2<<6) | (dreg << 3) | 0), 7, 4);
57 *((s4*)cd->mcodeptr) = (s4)imm;
61 OPWORD( ((3<<6) | (dreg << 3) | 0), 7, 4);
62 *((s2*)cd->mcodeptr) = (s2)imm;
68 /* emit_copy *******************************************************************
70 Generates a register/memory to register/memory copy.
72 *******************************************************************************/
74 void emit_copy(jitdata *jd, instruction *iptr)
81 /* get required compiler data */
85 /* get source and destination variables */
87 src = VAROP(iptr->s1);
88 dst = VAROP(iptr->dst);
90 if ((src->vv.regoff != dst->vv.regoff) ||
91 (IS_INMEMORY(src->flags ^ dst->flags))) {
93 if ((src->type == TYPE_RET) || (dst->type == TYPE_RET)) {
94 /* emit nothing, as the value won't be used anyway */
98 /* If one of the variables resides in memory, we can eliminate
99 the register move from/to the temporary register with the
100 order of getting the destination register and the load. */
102 if (IS_INMEMORY(src->flags)) {
103 if (IS_LNG_TYPE(src->type))
104 d = codegen_reg_of_var(iptr->opc, dst, REG_ITMP12_PACKED);
106 d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
108 s1 = emit_load(jd, iptr, src, d);
111 if (IS_LNG_TYPE(src->type))
112 s1 = emit_load(jd, iptr, src, REG_ITMP12_PACKED);
114 s1 = emit_load(jd, iptr, src, REG_IFTMP);
116 d = codegen_reg_of_var(iptr->opc, dst, s1);
121 case TYPE_INT: M_INTMOVE(s1, d); break;
122 case TYPE_ADR: M_ADRMOVE(s1, d); break;
123 case TYPE_LNG: M_LNGMOVE(s1, d); break;
124 #if !defined(ENABLE_SOFTFLOAT)
125 case TYPE_FLT: M_FLTMOVE(s1, d); break;
126 case TYPE_DBL: M_DBLMOVE(s1, d); break;
128 case TYPE_FLT: M_INTMOVE(s1, d); break;
129 case TYPE_DBL: M_LNGMOVE(s1, d); break;
132 vm_abort("emit_copy: unknown type %d", src->type);
136 emit_store(jd, iptr, dst, d);
141 /* emit_store ******************************************************************
143 Emits a possible store of the destination operand.
145 *******************************************************************************/
147 inline void emit_store(jitdata *jd, instruction *iptr, varinfo *dst, s4 d)
151 /* get required compiler data */
155 if (IS_INMEMORY(dst->flags)) {
159 #if defined(ENABLE_SOFTFLOAT)
163 M_LST(d, REG_SP, dst->vv.regoff * 4);
165 #if defined(ENABLE_SOFTFLOAT)
169 M_IST(d, REG_SP, dst->vv.regoff * 4);
172 M_AST(d, REG_SP, dst->vv.regoff * 4);
174 #if !defined(ENABLE_SOFTFLOAT)
176 M_DST(d, REG_SP, dst->vv.regoff * 4);
179 M_FST(d, REG_SP, dst->vv.regoff * 4);
183 vm_abort("emit_store: unknown type %d", dst->type);
189 /* emit_load *******************************************************************
191 Emits a possible load of an operand.
193 *******************************************************************************/
195 s4 emit_load(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
201 /* get required compiler data */
205 if (IS_INMEMORY(src->flags)) {
208 disp = src->vv.regoff * 4;
211 #if defined(ENABLE_SOFTFLOAT)
215 M_ILD(tempreg, REG_SP, disp);
217 #if defined(ENABLE_SOFTFLOAT)
221 M_LLD(tempreg, REG_SP, disp);
224 M_ALD(tempreg, REG_SP, disp);
226 #if !defined(ENABLE_SOFTFLOAT)
228 M_FLD(tempreg, REG_SP, disp);
231 M_DLD(tempreg, REG_SP, disp);
235 vm_abort("emit_load: unknown type %d", src->type);
238 if (IS_FLT_DBL_TYPE(src->type)) {
239 if (IS_2_WORD_TYPE(src->type)) {
240 M_DLD(tempreg, REG_SP, disp);
242 M_FLD(tempreg, REG_SP, disp);
245 if (IS_2_WORD_TYPE(src->type)) {
246 M_LLD(tempreg, REG_SP, disp);
248 M_ILD(tempreg, REG_SP, disp);
256 reg = src->vv.regoff;
262 /* emit_patcher_stubs **********************************************************
264 Generates the code for the patcher stubs.
266 *******************************************************************************/
267 void emit_patcher_stubs(jitdata *jd)
277 /* get required compiler data */
281 /* generate code patching stub call code */
285 for (pref = cd->patchrefs; pref != NULL; pref = pref->next) {
286 /* check code segment size */
290 /* Get machine code which is patched back in later. A
291 `bsr.l' is 6 bytes long. */
293 savedmcodeptr = cd->mcodebase + pref->branchpos;
294 mcode = *((u8 *) savedmcodeptr);
296 /* patch in `bsr.l' to call the following code */
298 tmpmcodeptr = cd->mcodeptr; /* save current mcodeptr */
299 cd->mcodeptr = savedmcodeptr; /* set mcodeptr to patch position */
301 M_BSR_IMM(tmpmcodeptr - (savedmcodeptr + PATCHER_CALL_SIZE) + 4);
303 cd->mcodeptr = tmpmcodeptr; /* restore the current mcodeptr */
306 M_IPUSH(REG_ITMP3); /* FIXME why, and restore where ? */
308 /* move pointer to java_objectheader onto stack */
310 #if defined(ENABLE_THREADS)
311 (void) dseg_add_unique_address(cd, NULL); /* flcword */
312 (void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
313 disp = dseg_add_unique_address(cd, NULL); /* vftbl */
315 assert(0); /* The next lines are wrong */
316 M_MOV_IMM(0, REG_ITMP3);
318 M_AADD_IMM(REG_ITMP3, disp);
324 /* push move machine code bytes and classinfo pointer */
326 M_IPUSH_IMM(mcode >> 32);
328 M_IPUSH_IMM(pref->ref);
329 M_IPUSH_IMM(pref->patcher);
331 M_JMP_IMM(asm_patcher_wrapper);
334 s4 emit_load_low(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
340 #if !defined(ENABLE_SOFTFLOAT)
341 assert(src->type == TYPE_LNG);
343 assert(src->type == TYPE_LNG || src->type == TYPE_DBL);
346 /* get required compiler data */
349 if (IS_INMEMORY(src->flags)) {
352 disp = src->vv.regoff * 4;
353 M_ILD(tempreg, REG_SP, disp + 4);
356 reg = GET_LOW_REG(src->vv.regoff);
360 s4 emit_load_high(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
366 #if !defined(ENABLE_SOFTFLOAT)
367 assert(src->type == TYPE_LNG);
369 assert(src->type == TYPE_LNG || src->type == TYPE_DBL);
371 /* get required compiler data */
374 if (IS_INMEMORY(src->flags)) {
376 disp = src->vv.regoff * 4;
377 M_ILD(tempreg, REG_SP, disp);
380 reg = GET_HIGH_REG(src->vv.regoff);
384 /* emit_branch *****************************************************************
386 Emits the code for conditional and unconditional branchs.
388 *******************************************************************************/
389 void emit_branch(codegendata *cd, s4 disp, s4 condition, s4 reg, u4 opt)
391 /* calculate the different displacements */
392 /* PC is a at branch instruction + 2 */
393 /* coditional and uncondition branching work the same way */
394 /* short branches have signed 16 bit offset */
395 /* long branches are signed 32 bit */
396 /* the 8 bit offset branching instructions are not used */
400 /* check displacement for overflow */
401 if ((disp & 0x0000FFFF) != disp) {
402 if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
403 cd->flags |= (CODEGENDATA_FLAG_ERROR | CODEGENDATA_FLAG_LONGBRANCHES);
407 /* check which branch to generate */
409 if (condition == BRANCH_UNCONDITIONAL) {
410 if (CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
416 if (CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
444 vm_abort("emit_branch: unknown condition %d", condition);
473 vm_abort("emit_branch: unknown condition %d", condition);
482 * Trace functions. Implement -verbose:call flag
483 * code marked by real NOP, but performance is no matter when using -verbose:call :)
485 void emit_verbosecall_enter(jitdata* jd)
494 if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
497 /* get required compiler data */
503 /* mark trace code */
506 M_LINK(REG_FP, -16*4);
509 /* builtin_verbosecall_enter takes all args as s8 type */
510 /* TRACE_ARGS_NUM is the number of args the builtin_verbosecall_enter expects */
513 disp = 16*4 + 4 + 4; /* points to old argument stack initially */
515 /* travel up stack to the first argument of the function which needs to be copied */
516 for (i=0; (i < md->paramcount) && (i < TRACE_ARGS_NUM); i++) {
518 if (IS_2_WORD_TYPE(md->paramtypes[i].type)) {
523 /* disp now points to the first arg which gets copied to the trace stack, relative to REG_SP! */
524 for (i=TRACE_ARGS_NUM-1; i>=0; --i) {
525 if (i < md->paramcount) {
526 /* traced function has such an argument */
527 t = md->paramtypes[i].type;
529 if (IS_2_WORD_TYPE(t)) {
530 /* copy from original argument stack */
531 M_ILD(REG_ITMP1, REG_SP, disp);
533 M_ILD(REG_ITMP1, REG_SP, disp);
536 /* displacment is increased as 4 byte on original stack but 8 byte on trace stack */
537 M_ILD(REG_ITMP1, REG_SP, disp);
543 /* function has no arg here, push nothing and adapt displacement */
549 M_JSR_IMM(builtin_verbosecall_enter);
550 /* pop arguments off stack */
551 M_AADD_IMM(TRACE_ARGS_NUM*8+4, REG_SP);
557 void emit_verbosecall_exit(jitdata* jd)
564 if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
567 /* get required compiler data */
573 /* void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m); */
576 /* mark trace code */
580 M_IPUSH_IMM(m); /* push methodinfo */
582 M_IPUSH_IMM(0); /* TODO push float result */
584 M_IPUSH_IMM(0); /* TODO push double result */
585 M_IPUSH_IMM(0); /* TODO push double result */
587 M_IPUSH(GET_HIGH_REG(REG_RESULT_PACKED))
588 M_IPUSH(GET_LOW_REG(REG_RESULT_PACKED)) /* push long result */
591 M_JSR_IMM(builtin_verbosecall_exit);
593 /* poping result registers from stack */
594 M_IPOP(GET_LOW_REG(REG_RESULT_PACKED))
595 M_IPOP(GET_HIGH_REG(REG_RESULT_PACKED))
598 /* that is wrong of course, overwrites registers and stuff */
599 M_IPOP(0); /* TODO: pop double result */
600 M_IPOP(0); /* TODO: pop double result */
602 M_IPOP(0); /* TODO: pop float result */
604 M_AADD_IMM(3*4, REG_SP);
606 M_AADD_IMM(4, REG_SP); /* remove rest of stack */
612 /* emit_classcast_check ********************************************************
614 Emit a ClassCastException check.
616 *******************************************************************************/
618 void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
620 if (INSTRUCTION_MUST_CHECK(iptr)) {
635 vm_abort("emit_classcast_check: unknown condition %d", condition);
637 M_TRAP_SETREGISTER(s1);
638 M_TRAP(EXCEPTION_HARDWARE_CLASSCAST);
642 /* emit_arrayindexoutofbounds_check ********************************************
644 Emit a ArrayIndexOutOfBoundsException check.
646 *******************************************************************************/
647 void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
649 if (INSTRUCTION_MUST_CHECK(iptr)) {
650 M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
651 M_ICMP(s2, REG_ITMP3);
653 /*M_ALD_INTERN(s2, REG_ZERO, EXCEPTION_LOAD_DISP_ARRAYINDEXOUTOFBOUNDS);*/
654 M_TRAP(EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
658 /* emit_nullpointer_check ******************************************************
660 Emit a NullPointerException check.
662 *******************************************************************************/
663 void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg)
665 if (INSTRUCTION_MUST_CHECK(iptr)) {
666 /* did like to assert on TYPE_ADR, but not possible in here */
669 M_TRAP(M68K_EXCEPTION_HARDWARE_NULLPOINTER);
673 /* emit_arithmetic_check *******************************************************
675 Emit an ArithmeticException check.
677 *******************************************************************************/
679 void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
681 if (INSTRUCTION_MUST_CHECK(iptr)) {
684 /*M_ALD_INTERN(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_ARITHMETIC);*/
685 M_ILLEGAL; /* FIXME */
690 /* emit_exception_check_areg **************************************************
692 Emit an Exception check, tested register is address REG_RESULT
694 *******************************************************************************/
695 void emit_exception_check_areg(codegendata *cd, instruction *iptr)
697 if (INSTRUCTION_MUST_CHECK(iptr)) {
700 /*M_ALD_INTERN(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_EXCEPTION);*/
706 /* emit_exception_check_ireg **************************************************
708 Emit an Exception check. Teste register is integer REG_RESULT
710 *******************************************************************************/
711 void emit_exception_check(codegendata *cd, instruction *iptr)
713 if (INSTRUCTION_MUST_CHECK(iptr)) {
716 /*M_ALD_INTERN(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_EXCEPTION);*/
717 M_TRAP(EXCEPTION_HARDWARE_EXCEPTION);
723 * These are local overrides for various environment variables in Emacs.
724 * Please do not remove this and leave it at the end of the file, where
725 * Emacs will automagically detect them.
726 * ---------------------------------------------------------------------
729 * indent-tabs-mode: t
733 * vim:noexpandtab:sw=4:ts=4: