1 /* src/vm/jit/codegen-common.c - architecture independent code generator stuff
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: Reinhard Grafl
30 Changes: Christian Thalinger
34 All functions assume the following code area / data area layout:
38 | code area | code area grows to higher addresses
40 +-----------+ <-- start of procedure
42 | data area | data area grows to lower addresses
46 The functions first write into a temporary code/data area allocated by
47 "codegen_init". "codegen_finish" copies the code and data area into permanent
48 memory. All functions writing values into the data area return the offset
49 relative the begin of the code area (start of procedure).
51 $Id: codegen-common.c 5929 2006-11-06 17:13:40Z twisti $
63 #if defined(ENABLE_JIT)
64 /* this is required PATCHER_CALL_SIZE */
69 /* this is required for REG_SPLIT */
73 #include "mm/memory.h"
74 #include "toolbox/avl.h"
75 #include "toolbox/list.h"
76 #include "toolbox/logging.h"
77 #include "native/jni.h"
78 #include "native/native.h"
80 #if defined(ENABLE_THREADS)
81 # include "threads/native/threads.h"
84 #include "vm/exceptions.h"
85 #include "vm/method.h"
86 #include "vm/options.h"
87 #include "vm/statistics.h"
88 #include "vm/stringlocal.h"
89 #include "vm/jit/asmpart.h"
90 #include "vm/jit/codegen-common.h"
92 #if defined(ENABLE_DISASSEMBLER)
93 # include "vm/jit/disass.h"
96 #include "vm/jit/dseg.h"
97 #include "vm/jit/jit.h"
98 #include "vm/jit/stacktrace.h"
99 #include "vm/jit/replace.h"
101 #if defined(ENABLE_INTRP)
102 #include "vm/jit/intrp/intrp.h"
106 /* in this tree we store all method addresses *********************************/
108 static avl_tree *methodtree = NULL;
109 static s4 methodtree_comparator(const void *pc, const void *element);
112 /* codegen_init ****************************************************************
116 *******************************************************************************/
118 void codegen_init(void)
120 /* this tree is global, not method specific */
123 #if defined(ENABLE_JIT)
124 methodtree_element *mte;
127 methodtree = avl_create(&methodtree_comparator);
129 #if defined(ENABLE_JIT)
130 /* insert asm_vm_call_method */
132 mte = NEW(methodtree_element);
134 mte->startpc = (u1 *) (ptrint) asm_vm_call_method;
135 mte->endpc = (u1 *) ((ptrint) asm_call_jit_compiler - 1);
137 avl_insert(methodtree, mte);
138 #endif /* defined(ENABLE_JIT) */
143 /* codegen_setup ***************************************************************
145 Allocates and initialises code area, data area and references.
147 *******************************************************************************/
149 void codegen_setup(jitdata *jd)
154 /* get required compiler data */
159 cd->mcodebase = DMNEW(u1, MCODEINITSIZE);
160 cd->mcodeend = cd->mcodebase + MCODEINITSIZE;
161 cd->mcodesize = MCODEINITSIZE;
163 /* initialize mcode variables */
165 cd->mcodeptr = cd->mcodebase;
166 cd->lastmcodeptr = cd->mcodebase;
168 #if defined(ENABLE_INTRP)
169 /* native dynamic superinstructions variables */
172 cd->ncodebase = DMNEW(u1, NCODEINITSIZE);
173 cd->ncodesize = NCODEINITSIZE;
175 /* initialize ncode variables */
177 cd->ncodeptr = cd->ncodebase;
179 cd->lastinstwithoutdispatch = ~0; /* no inst without dispatch */
180 cd->superstarts = NULL;
187 cd->jumpreferences = NULL;
189 #if defined(__I386__) || defined(__X86_64__) || defined(__XDSPCORE__) || defined(ENABLE_INTRP)
190 cd->datareferences = NULL;
193 cd->exceptionrefs = NULL;
194 /* cd->patchrefs = list_create_dump(OFFSET(patchref, linkage)); */
195 cd->patchrefs = NULL;
197 cd->linenumberreferences = NULL;
198 cd->linenumbertablesizepos = 0;
199 cd->linenumbertablestartpos = 0;
200 cd->linenumbertab = 0;
204 cd->maxstack = m->maxstack;
206 #if defined(ENABLE_THREADS)
207 cd->threadcritcurrent.next = NULL;
208 cd->threadcritcount = 0;
213 /* codegen_close ***************************************************************
217 *******************************************************************************/
219 void codegen_close(void)
221 /* TODO: release avl tree on i386 and x86_64 */
225 /* codegen_increase ************************************************************
229 *******************************************************************************/
231 void codegen_increase(codegendata *cd)
235 /* save old mcodebase pointer */
237 oldmcodebase = cd->mcodebase;
239 /* reallocate to new, doubled memory */
241 cd->mcodebase = DMREALLOC(cd->mcodebase,
246 cd->mcodeend = cd->mcodebase + cd->mcodesize;
248 /* set new mcodeptr */
250 cd->mcodeptr = cd->mcodebase + (cd->mcodeptr - oldmcodebase);
252 #if defined(__I386__) || defined(__MIPS__) || defined(__X86_64__) || defined(ENABLE_INTRP)
253 /* adjust the pointer to the last patcher position */
255 if (cd->lastmcodeptr != NULL)
256 cd->lastmcodeptr = cd->mcodebase + (cd->lastmcodeptr - oldmcodebase);
261 /* codegen_ncode_increase ******************************************************
265 *******************************************************************************/
267 #if defined(ENABLE_INTRP)
268 u1 *codegen_ncode_increase(codegendata *cd, u1 *ncodeptr)
272 /* save old ncodebase pointer */
274 oldncodebase = cd->ncodebase;
276 /* reallocate to new, doubled memory */
278 cd->ncodebase = DMREALLOC(cd->ncodebase,
284 /* return the new ncodeptr */
286 return (cd->ncodebase + (ncodeptr - oldncodebase));
291 /* codegen_add_branch_ref ******************************************************
293 Prepends an branch to the list.
295 *******************************************************************************/
297 void codegen_add_branch_ref(codegendata *cd, basicblock *target)
301 /* calculate the mpc of the branch instruction */
303 branchmpc = cd->mcodeptr - cd->mcodebase;
305 #if defined(ENABLE_JIT)
306 /* Check if the target basicblock has already a start pc, so the
307 jump is backward and we can resolve it immediately. */
309 if ((target->mpc >= 0)
310 # if defined(ENABLE_INTRP)
311 /* The interpreter uses absolute branches, so we do branch
312 resolving after the code and data segment move. */
318 md_codegen_patch_branch(cd, branchmpc, target->mpc);
323 branchref *br = DNEW(branchref);
325 br->branchpos = branchmpc;
326 br->next = target->branchrefs;
328 target->branchrefs = br;
333 /* codegen_resolve_branchrefs **************************************************
335 Resolves and patches the branch references of a given basic block.
337 *******************************************************************************/
339 void codegen_resolve_branchrefs(codegendata *cd, basicblock *bptr)
347 targetmpc = bptr->mpc;
349 for (br = bptr->branchrefs; br != NULL; br = br->next) {
350 branchmpc = br->branchpos;
352 md_codegen_patch_branch(cd, branchmpc, targetmpc);
357 /* codegen_add_exception_ref ***************************************************
359 Prepends an exception branch to the list.
361 *******************************************************************************/
363 static void codegen_add_exception_ref(codegendata *cd, s4 reg,
364 functionptr function)
369 branchmpc = cd->mcodeptr - cd->mcodebase;
371 er = DNEW(exceptionref);
373 er->branchpos = branchmpc;
375 er->function = function;
377 er->next = cd->exceptionrefs;
379 cd->exceptionrefs = er;
383 /* codegen_add_arithmeticexception_ref *****************************************
385 Adds an ArithmeticException branch to the list.
387 *******************************************************************************/
389 void codegen_add_arithmeticexception_ref(codegendata *cd)
391 codegen_add_exception_ref(cd, -1, STACKTRACE_inline_arithmeticexception);
395 /* codegen_add_arrayindexoutofboundsexception_ref ******************************
397 Adds an ArrayIndexOutOfBoundsException branch to the list.
399 *******************************************************************************/
401 void codegen_add_arrayindexoutofboundsexception_ref(codegendata *cd, s4 reg)
403 codegen_add_exception_ref(cd, reg,
404 STACKTRACE_inline_arrayindexoutofboundsexception);
408 /* codegen_add_arraystoreexception_ref *****************************************
410 Adds an ArrayStoreException branch to the list.
412 *******************************************************************************/
414 void codegen_add_arraystoreexception_ref(codegendata *cd)
416 codegen_add_exception_ref(cd, -1, STACKTRACE_inline_arraystoreexception);
420 /* codegen_add_classcastexception_ref ******************************************
422 Adds an ClassCastException branch to the list.
424 *******************************************************************************/
426 void codegen_add_classcastexception_ref(codegendata *cd, s4 reg)
428 codegen_add_exception_ref(cd, reg, STACKTRACE_inline_classcastexception);
432 /* codegen_add_nullpointerexception_ref ****************************************
434 Adds an NullPointerException branch to the list.
436 *******************************************************************************/
438 void codegen_add_nullpointerexception_ref(codegendata *cd)
440 codegen_add_exception_ref(cd, -1, STACKTRACE_inline_nullpointerexception);
444 /* codegen_add_fillinstacktrace_ref ********************************************
446 Adds a fillInStackTrace branch to the list.
448 *******************************************************************************/
450 void codegen_add_fillinstacktrace_ref(codegendata *cd)
452 codegen_add_exception_ref(cd, -1, STACKTRACE_inline_fillInStackTrace);
456 /* codegen_add_patch_ref *******************************************************
458 Appends a new patcher reference to the list of patching positions.
460 *******************************************************************************/
462 void codegen_add_patch_ref(codegendata *cd, functionptr patcher, voidptr ref,
468 branchmpc = cd->mcodeptr - cd->mcodebase;
472 pr->branchpos = branchmpc;
474 pr->patcher = patcher;
477 /* list_add_first(cd->patchrefs, pr); */
478 pr->next = cd->patchrefs;
481 #if defined(ENABLE_JIT) && (defined(__I386__) || defined(__MIPS__) || defined(__X86_64__))
482 /* On some architectures the patcher stub call instruction might
483 be longer than the actual instruction generated. On this
484 architectures we store the last patcher call position and after
485 the basic block code generation is completed, we check the
486 range and maybe generate some nop's. */
488 cd->lastmcodeptr = cd->mcodeptr + PATCHER_CALL_SIZE;
493 /* methodtree_comparator *******************************************************
495 Comparator function used for the AVL tree of methods.
497 *******************************************************************************/
499 static s4 methodtree_comparator(const void *pc, const void *element)
501 methodtree_element *mte;
502 methodtree_element *mtepc;
504 mte = (methodtree_element *) element;
505 mtepc = (methodtree_element *) pc;
507 /* compare both startpc and endpc of pc, even if they have the same value,
508 otherwise the avl_probe sometimes thinks the element is already in the
511 if ((long) mte->startpc <= (long) mtepc->startpc &&
512 (long) mtepc->startpc <= (long) mte->endpc &&
513 (long) mte->startpc <= (long) mtepc->endpc &&
514 (long) mtepc->endpc <= (long) mte->endpc) {
517 } else if ((long) mtepc->startpc < (long) mte->startpc) {
526 /* codegen_insertmethod ********************************************************
528 Insert the machine code range of a method into the AVL tree of methods.
530 *******************************************************************************/
532 void codegen_insertmethod(u1 *startpc, u1 *endpc)
534 methodtree_element *mte;
536 /* allocate new method entry */
538 mte = NEW(methodtree_element);
540 mte->startpc = startpc;
543 /* this function does not return an error, but asserts for
546 avl_insert(methodtree, mte);
550 /* codegen_get_pv_from_pc ******************************************************
552 Find the PV for the given PC by searching in the AVL tree of
555 *******************************************************************************/
557 u1 *codegen_get_pv_from_pc(u1 *pc)
559 methodtree_element mtepc;
560 methodtree_element *mte;
562 /* allocation of the search structure on the stack is much faster */
567 mte = avl_find(methodtree, &mtepc);
570 /* No method was found. Let's dump a stacktrace. */
572 log_println("We received a SIGSEGV and tried to handle it, but we were");
573 log_println("unable to find a Java method at:");
575 #if SIZEOF_VOID_P == 8
576 log_println("PC=0x%016lx", pc);
578 log_println("PC=0x%08x", pc);
581 log_println("Dumping the current stacktrace:");
583 stacktrace_dump_trace(THREADOBJECT);
585 vm_abort("Exiting...");
592 /* codegen_get_pv_from_pc_nocheck **********************************************
594 Find the PV for the given PC by searching in the AVL tree of
595 methods. This method does not check the return value and is used
598 *******************************************************************************/
600 u1 *codegen_get_pv_from_pc_nocheck(u1 *pc)
602 methodtree_element mtepc;
603 methodtree_element *mte;
605 /* allocation of the search structure on the stack is much faster */
610 mte = avl_find(methodtree, &mtepc);
619 /* codegen_finish **************************************************************
621 Finishes the code generation. A new memory, large enough for both
622 data and code, is allocated and data and code are copied together
623 to their final layout, unresolved jumps are resolved, ...
625 *******************************************************************************/
627 void codegen_finish(jitdata *jd)
632 #if defined(ENABLE_INTRP)
641 /* get required compiler data */
646 /* prevent compiler warning */
648 #if defined(ENABLE_INTRP)
652 /* calculate the code length */
654 mcodelen = (s4) (cd->mcodeptr - cd->mcodebase);
656 #if defined(ENABLE_THREADS)
657 extralen = sizeof(critical_section_node_t) * cd->threadcritcount;
662 #if defined(ENABLE_STATISTICS)
664 count_code_len += mcodelen;
665 count_data_len += cd->dseglen;
669 alignedmcodelen = MEMORY_ALIGN(mcodelen, MAX_ALIGN);
671 #if defined(ENABLE_INTRP)
673 ncodelen = cd->ncodeptr - cd->ncodebase;
675 ncodelen = 0; /* avoid compiler warning */
679 cd->dseglen = MEMORY_ALIGN(cd->dseglen, MAX_ALIGN);
680 alignedlen = alignedmcodelen + cd->dseglen;
682 #if defined(ENABLE_INTRP)
684 alignedlen += ncodelen;
688 /* allocate new memory */
690 code->mcodelength = mcodelen + cd->dseglen;
691 code->mcode = CNEW(u1, alignedlen + extralen);
693 /* set the entrypoint of the method */
695 assert(code->entrypoint == NULL);
696 code->entrypoint = epoint = (code->mcode + cd->dseglen);
698 /* fill the data segment (code->entrypoint must already be set!) */
702 /* copy code to the new location */
704 MCOPY((void *) code->entrypoint, cd->mcodebase, u1, mcodelen);
706 #if defined(ENABLE_INTRP)
707 /* relocate native dynamic superinstruction code (if any) */
710 cd->mcodebase = code->entrypoint;
713 u1 *ncodebase = code->mcode + cd->dseglen + alignedmcodelen;
715 MCOPY((void *) ncodebase, cd->ncodebase, u1, ncodelen);
717 /* flush the instruction and data caches */
719 md_cacheflush(ncodebase, ncodelen);
721 /* set some cd variables for dynamic_super_rerwite */
723 cd->ncodebase = ncodebase;
726 cd->ncodebase = NULL;
729 dynamic_super_rewrite(cd);
733 /* jump table resolving */
735 for (jr = cd->jumpreferences; jr != NULL; jr = jr->next)
736 *((functionptr *) ((ptrint) epoint + jr->tablepos)) =
737 (functionptr) ((ptrint) epoint + (ptrint) jr->target->mpc);
739 /* line number table resolving */
745 for (lr = cd->linenumberreferences; lr != NULL; lr = lr->next) {
747 target = lr->targetmpc;
748 /* if the entry contains an mcode pointer (normal case), resolve it */
749 /* (see doc/inlining_stacktrace.txt for details) */
750 if (lr->linenumber >= -2) {
751 target += (ptrint) epoint;
753 *((functionptr *) ((ptrint) epoint + (ptrint) lr->tablepos)) =
754 (functionptr) target;
757 *((functionptr *) ((ptrint) epoint + cd->linenumbertablestartpos)) =
758 (functionptr) ((ptrint) epoint + cd->linenumbertab);
760 *((ptrint *) ((ptrint) epoint + cd->linenumbertablesizepos)) = lrtlen;
763 /* replacement point resolving */
768 rp = code->rplpoints;
769 for (i=0; i<code->rplpointcount; ++i, ++rp) {
770 rp->pc = (u1*) ((ptrint) epoint + (ptrint) rp->pc);
771 rp->outcode = (u1*) ((ptrint) epoint + (ptrint) rp->outcode);
775 /* add method into methodtree to find the entrypoint */
777 codegen_insertmethod(code->entrypoint, code->entrypoint + mcodelen);
779 #if defined(__I386__) || defined(__X86_64__) || defined(__XDSPCORE__) || defined(ENABLE_INTRP)
780 /* resolve data segment references */
782 dseg_resolve_datareferences(jd);
785 #if defined(ENABLE_THREADS)
787 critical_section_node_t *n = (critical_section_node_t *) ((ptrint) code->mcode + alignedlen);
789 codegen_critical_section_t *nt = cd->threadcrit;
791 for (i = 0; i < cd->threadcritcount; i++) {
792 n->mcodebegin = (u1 *) (ptrint) code->mcode + nt->mcodebegin;
793 n->mcodeend = (u1 *) (ptrint) code->mcode + nt->mcodeend;
794 n->mcoderestart = (u1 *) (ptrint) code->mcode + nt->mcoderestart;
795 critical_register_critical_section(n);
802 /* flush the instruction and data caches */
804 md_cacheflush(code->mcode, code->mcodelength);
808 /* codegen_createnativestub ****************************************************
810 Wrapper for createnativestub.
813 the codeinfo representing the stub code.
815 *******************************************************************************/
817 codeinfo *codegen_createnativestub(functionptr f, methodinfo *m)
826 /* mark dump memory */
828 dumpsize = dump_size();
833 jd->cd = DNEW(codegendata);
834 jd->rd = DNEW(registerdata);
837 /* Allocate codeinfo memory from the heap as we need to keep them. */
839 jd->code = code_codeinfo_new(m); /* XXX check allocation */
841 /* get required compiler data */
845 /* set the flags for the current JIT run */
847 #if defined(ENABLE_PROFILING)
849 jd->flags |= JITDATA_FLAG_INSTRUMENT;
853 jd->flags |= JITDATA_FLAG_VERBOSECALL;
855 /* setup code generation stuff */
857 #if defined(ENABLE_JIT)
858 # if defined(ENABLE_INTRP)
866 /* create new method descriptor with additional native parameters */
869 nativeparams = (m->flags & ACC_STATIC) ? 2 : 1;
871 nmd = (methoddesc *) DMNEW(u1, sizeof(methoddesc) - sizeof(typedesc) +
872 md->paramcount * sizeof(typedesc) +
873 nativeparams * sizeof(typedesc));
875 nmd->paramcount = md->paramcount + nativeparams;
877 nmd->params = DMNEW(paramdesc, nmd->paramcount);
879 nmd->paramtypes[0].type = TYPE_ADR; /* add environment pointer */
881 if (m->flags & ACC_STATIC)
882 nmd->paramtypes[1].type = TYPE_ADR; /* add class pointer */
884 MCOPY(nmd->paramtypes + nativeparams, md->paramtypes, typedesc,
887 #if defined(ENABLE_JIT)
888 # if defined(ENABLE_INTRP)
894 /* generate the code */
896 #if defined(ENABLE_JIT)
897 # if defined(ENABLE_INTRP)
899 code->entrypoint = intrp_createnativestub(f, jd, nmd);
902 code->entrypoint = createnativestub(f, jd, nmd);
904 code->entrypoint = intrp_createnativestub(f, jd, nmd);
907 #if defined(ENABLE_STATISTICS)
909 count_nstub_len += code->mcodelength;
913 /* disassemble native stub */
915 if (opt_shownativestub) {
916 #if defined(ENABLE_DISASSEMBLER)
917 codegen_disassemble_nativestub(m,
918 (u1 *) (ptrint) code->entrypoint,
919 (u1 *) (ptrint) code->entrypoint + (code->mcodelength - jd->cd->dseglen));
922 /* show data segment */
924 if (opt_showddatasegment)
927 #endif /* !defined(NDEBUG) */
931 dump_release(dumpsize);
933 /* return native stub code */
939 /* codegen_disassemble_nativestub **********************************************
941 Disassembles the generated native stub.
943 *******************************************************************************/
945 #if defined(ENABLE_DISASSEMBLER)
946 void codegen_disassemble_nativestub(methodinfo *m, u1 *start, u1 *end)
948 printf("Native stub: ");
949 utf_fprint_printable_ascii_classname(stdout, m->class->name);
951 utf_fprint_printable_ascii(stdout, m->name);
952 utf_fprint_printable_ascii(stdout, m->descriptor);
953 printf("\n\nLength: %d\n\n", (s4) (end - start));
955 DISASSEMBLE(start, end);
960 /* codegen_start_native_call ***************************************************
962 Prepares the stuff required for a native (JNI) function call:
964 - adds a stackframe info structure to the chain, for stacktraces
965 - prepares the local references table on the stack
967 The layout of the native stub stackframe should look like this:
969 +---------------------------+ <- SP (of parent Java function)
971 +---------------------------+
973 | stackframe info structure |
975 +---------------------------+
977 | local references table |
979 +---------------------------+
981 | arguments (if any) |
983 +---------------------------+ <- SP (native stub)
985 *******************************************************************************/
987 void codegen_start_native_call(u1 *datasp, u1 *pv, u1 *sp, u1 *ra)
992 /* get data structures from stack */
994 sfi = (stackframeinfo *) (datasp - sizeof(stackframeinfo));
995 lrt = (localref_table *) (datasp - sizeof(stackframeinfo) -
996 sizeof(localref_table));
998 /* add a stackframeinfo to the chain */
1000 stacktrace_create_native_stackframeinfo(sfi, pv, sp, ra);
1002 /* add current JNI local references table to this thread */
1004 lrt->capacity = LOCALREFTABLE_CAPACITY;
1006 lrt->localframes = 1;
1007 lrt->prev = LOCALREFTABLE;
1009 /* clear the references array (memset is faster the a for-loop) */
1011 MSET(lrt->refs, 0, java_objectheader*, LOCALREFTABLE_CAPACITY);
1013 LOCALREFTABLE = lrt;
1017 /* codegen_finish_native_call **************************************************
1019 Removes the stuff required for a native (JNI) function call.
1020 Additionally it checks for an exceptions and in case, get the
1021 exception object and clear the pointer.
1023 *******************************************************************************/
1025 java_objectheader *codegen_finish_native_call(u1 *datasp)
1027 stackframeinfo *sfi;
1028 stackframeinfo **psfi;
1029 localref_table *lrt;
1030 localref_table *plrt;
1032 java_objectheader *e;
1034 /* get data structures from stack */
1036 sfi = (stackframeinfo *) (datasp - sizeof(stackframeinfo));
1037 lrt = (localref_table *) (datasp - sizeof(stackframeinfo) -
1038 sizeof(localref_table));
1040 /* remove current stackframeinfo from chain */
1042 psfi = STACKFRAMEINFO;
1046 /* release JNI local references tables for this thread */
1048 lrt = LOCALREFTABLE;
1050 /* release all current local frames */
1052 for (localframes = lrt->localframes; localframes >= 1; localframes--) {
1053 /* get previous frame */
1057 /* Clear all reference entries (only for tables allocated on
1060 if (localframes > 1)
1061 MSET(&lrt->refs[0], 0, java_objectheader*, lrt->capacity);
1065 /* set new local references table */
1070 /* now store the previous local frames in the thread structure */
1072 LOCALREFTABLE = lrt;
1074 /* get the exception and return it */
1076 e = exceptions_get_and_clear_exception();
1082 /* removecompilerstub **********************************************************
1084 Deletes a compilerstub from memory (simply by freeing it).
1086 *******************************************************************************/
1088 void removecompilerstub(u1 *stub)
1090 /* pass size 1 to keep the intern function happy */
1092 CFREE((void *) stub, 1);
1096 /* removenativestub ************************************************************
1098 Removes a previously created native-stub from memory.
1100 *******************************************************************************/
1102 void removenativestub(u1 *stub)
1104 /* pass size 1 to keep the intern function happy */
1106 CFREE((void *) stub, 1);
1110 /* codegen_reg_of_var **********************************************************
1112 This function determines a register, to which the result of an
1113 operation should go, when it is ultimatively intended to store the
1114 result in pseudoregister v. If v is assigned to an actual
1115 register, this register will be returned. Otherwise (when v is
1116 spilled) this function returns tempregnum. If not already done,
1117 regoff and flags are set in the stack location.
1119 On ARM we have to check if a long/double variable is splitted
1120 across reg/stack (HIGH_REG == REG_SPLIT). We return the actual
1121 register of v for LOW_REG and the tempregnum for HIGH_REG in such
1122 cases. (michi 2005/07/24)
1124 *******************************************************************************/
1126 s4 codegen_reg_of_var(u2 opcode, varinfo *v, s4 tempregnum)
1130 /* Do we have to generate a conditional move? Yes, then always
1131 return the temporary register. The real register is identified
1132 during the store. */
1134 if (opcode & ICMD_CONDITION_MASK)
1138 if (!(v->flags & INMEMORY)) {
1139 #if defined(__ARM__) && defined(__ARMEL__)
1140 if (IS_2_WORD_TYPE(v->type) && (GET_HIGH_REG(v->vv.regoff) == REG_SPLIT))
1141 return PACK_REGS(GET_LOW_REG(v->vv.regoff),
1142 GET_HIGH_REG(tempregnum));
1144 #if defined(__ARM__) && defined(__ARMEB__)
1145 if (IS_2_WORD_TYPE(v->type) && (GET_LOW_REG(v->vv.regoff) == REG_SPLIT))
1146 return PACK_REGS(GET_LOW_REG(tempregnum),
1147 GET_HIGH_REG(v->vv.regoff));
1149 return v->vv.regoff;
1152 #if defined(ENABLE_STATISTICS)
1154 count_spills_read++;
1160 /* codegen_reg_of_dst **********************************************************
1162 This function determines a register, to which the result of an
1163 operation should go, when it is ultimatively intended to store the
1164 result in iptr->dst.var. If dst.var is assigned to an actual
1165 register, this register will be returned. Otherwise (when it is
1166 spilled) this function returns tempregnum. If not already done,
1167 regoff and flags are set in the stack location.
1169 On ARM we have to check if a long/double variable is splitted
1170 across reg/stack (HIGH_REG == REG_SPLIT). We return the actual
1171 register of dst.var for LOW_REG and the tempregnum for HIGH_REG in such
1172 cases. (michi 2005/07/24)
1174 *******************************************************************************/
1176 s4 codegen_reg_of_dst(jitdata *jd, instruction *iptr, s4 tempregnum)
1178 return codegen_reg_of_var(iptr->opc, VAROP(iptr->dst), tempregnum);
1182 #if defined(ENABLE_THREADS)
1183 void codegen_threadcritrestart(codegendata *cd, int offset)
1185 cd->threadcritcurrent.mcoderestart = offset;
1189 void codegen_threadcritstart(codegendata *cd, int offset)
1191 cd->threadcritcurrent.mcodebegin = offset;
1195 void codegen_threadcritstop(codegendata *cd, int offset)
1197 cd->threadcritcurrent.next = cd->threadcrit;
1198 cd->threadcritcurrent.mcodeend = offset;
1199 cd->threadcrit = DNEW(codegen_critical_section_t);
1200 *(cd->threadcrit) = cd->threadcritcurrent;
1201 cd->threadcritcount++;
1207 * These are local overrides for various environment variables in Emacs.
1208 * Please do not remove this and leave it at the end of the file, where
1209 * Emacs will automagically detect them.
1210 * ---------------------------------------------------------------------
1213 * indent-tabs-mode: t
1217 * vim:noexpandtab:sw=4:ts=4: