1 /* src/vm/jit/powerpc/linux/md-abi.c - functions for PowerPC Linux ABI
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: md-abi.c 8270 2007-08-08 13:57:12Z twisti $
35 #include "vm/jit/powerpc/linux/md-abi.h"
37 #include "vm/global.h"
39 #include "vm/jit/abi.h"
41 #include "vmcore/descriptor.h"
44 /* register descripton arrays *************************************************/
47 /* zero, sp, NO(sys), a0/v0, a1/v1, a2, a3, a4, */
48 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
50 /* a5, a6, a7, itmp1, itmp2, pv, s0, s1, */
51 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
53 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
54 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
56 /* s2, s3, s4, s5, s6, s7, s8, s9, */
57 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
62 const char *abi_registers_integer_name[] = {
63 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
64 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
65 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
66 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
69 const int abi_registers_integer_argument[] = {
80 const int abi_registers_integer_saved[] = {
93 const int abi_registers_integer_temporary[] = {
104 int nregdescfloat[] = {
105 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
106 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
108 /* fa7, ft0, ft1, ft2, ft3, ft4, fs0, fs1, */
109 REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_SAV, REG_SAV,
111 /*ftmp1, ftmp2, ft5, ft6, ft7, ft8, ft9, ft10, */
112 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
114 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
115 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
121 const int abi_registers_float_argument[] = {
132 const int abi_registers_float_saved[] = {
145 const int abi_registers_float_temporary[] = {
160 /* md_param_alloc **************************************************************
162 Allocate Arguments to Stackslots according the Calling Conventions
165 md->paramcount: Number of arguments for this method
166 md->paramtypes[].type: Argument types
169 md->params[].inmemory: Argument spilled on stack
170 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
171 md->memuse: Stackslots needed for argument spilling
172 md->argintreguse: max number of integer arguments used
173 md->argfltreguse: max number of float arguments used
175 *******************************************************************************/
177 void md_param_alloc(methoddesc *md)
185 /* set default values */
189 stacksize = LA_SIZE_IN_POINTERS;
191 /* get params field of methoddesc */
195 for (i = 0; i < md->paramcount; i++, pd++) {
196 switch (md->paramtypes[i].type) {
199 if (iarg < INT_ARG_CNT) {
200 pd->inmemory = false;
202 pd->regoff = abi_registers_integer_argument[iarg];
207 pd->index = stacksize;
208 pd->regoff = stacksize * 8;
214 if (iarg < INT_ARG_CNT - 1) {
216 pd->inmemory = false;
217 pd->index = PACK_REGS(iarg + 1, iarg);
219 PACK_REGS(abi_registers_integer_argument[iarg + 1],
220 abi_registers_integer_argument[iarg]);
225 pd->index = stacksize;
226 pd->regoff = stacksize * 8;
234 if (farg < FLT_ARG_CNT) {
235 pd->inmemory = false;
237 pd->regoff = abi_registers_float_argument[farg];
242 pd->index = stacksize;
243 pd->regoff = stacksize * 8;
253 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return
254 values, this argument register usage has to be regarded,
257 if (IS_INT_LNG_TYPE(md->returntype.type)) {
258 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
259 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
262 if (IS_FLT_DBL_TYPE(md->returntype.type))
267 /* fill register and stack usage */
269 md->argintreguse = iarg;
270 md->argfltreguse = farg;
271 md->memuse = stacksize;
275 /* md_param_alloc_native *******************************************************
277 Pre-allocate arguments according the native ABI.
279 *******************************************************************************/
281 void md_param_alloc_native(methoddesc *md)
289 /* set default values */
293 stacksize = LA_SIZE_IN_POINTERS;
295 /* get params field of methoddesc */
299 for (i = 0; i < md->paramcount; i++, pd++) {
300 switch (md->paramtypes[i].type) {
303 if (iarg < INT_ARG_CNT) {
304 pd->inmemory = false;
305 pd->regoff = abi_registers_integer_argument[iarg];
310 pd->regoff = stacksize * 4;
316 if (iarg < INT_ARG_CNT - 1) {
318 pd->inmemory = false;
320 PACK_REGS(abi_registers_integer_argument[iarg + 1],
321 abi_registers_integer_argument[iarg]);
327 pd->regoff = stacksize * 4;
334 if (farg < FLT_ARG_CNT) {
335 pd->inmemory = false;
336 pd->regoff = abi_registers_float_argument[farg];
341 pd->regoff = stacksize * 4;
347 if (farg < FLT_ARG_CNT) {
348 pd->inmemory = false;
349 pd->regoff = abi_registers_float_argument[farg];
355 pd->regoff = stacksize * 4;
365 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return
366 values, this argument register usage has to be regarded,
369 if (IS_INT_LNG_TYPE(md->returntype.type)) {
370 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
371 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
374 if (IS_FLT_DBL_TYPE(md->returntype.type))
379 /* fill register and stack usage */
381 md->argintreguse = iarg;
382 md->argfltreguse = farg;
383 md->memuse = stacksize;
387 /* md_return_alloc *************************************************************
389 Precolor the Java Stackelement containing the Return Value, if
390 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
394 jd: jitdata of the current method
395 stackslot: Java Stackslot to contain the Return Value
398 if precoloring was possible:
399 VAR(stackslot->varnum)->flags = PREALLOC
400 ->regoff = [REG_RESULT|REG_FRESULT]
401 rd->arg[flt|int]reguse set to a value according the register usage
403 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
405 *******************************************************************************/
407 void md_return_alloc(jitdata *jd, stackptr stackslot)
413 /* get required compiler data */
420 /* In Leafmethods Local Vars holding parameters are precolored to
421 their argument register -> so leafmethods with paramcount > 0
422 could already use R3 == a00! */
424 if (!jd->isleafmethod || (md->paramcount == 0)) {
425 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
426 has not to survive method invokations. */
428 if (!(stackslot->flags & SAVEDVAR)) {
429 VAR(stackslot->varnum)->flags = PREALLOC;
431 if (IS_INT_LNG_TYPE(md->returntype.type)) {
432 if (!IS_2_WORD_TYPE(md->returntype.type)) {
433 if (rd->argintreguse < 1)
434 rd->argintreguse = 1;
436 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
439 if (rd->argintreguse < 2)
440 rd->argintreguse = 2;
442 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
445 else { /* float/double */
446 if (rd->argfltreguse < 1)
447 rd->argfltreguse = 1;
449 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
457 * These are local overrides for various environment variables in Emacs.
458 * Please do not remove this and leave it at the end of the file, where
459 * Emacs will automagically detect them.
460 * ---------------------------------------------------------------------
463 * indent-tabs-mode: t