1 /* src/vm/jit/powerpc/darwin/md-abi.c - functions for PowerPC Darwin 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 8115 2007-06-20 19:14:05Z michi $
33 #include "vm/jit/powerpc/darwin/md-abi.h"
35 #include "vm/global.h"
37 #include "vm/jit/abi.h"
39 #include "vmcore/descriptor.h"
42 /* register descripton arrays *************************************************/
45 /* zero, sp, t0, a0/v0, a0/v1, a2, a3, a4, */
46 REG_RES, REG_RES, REG_TMP, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
48 /* a5, a6, a7, itmp1, itmp2, pv, s0, s1, */
49 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
51 /*itmp3, t1, t2, t3, t4, t5, t6, t7, */
52 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
54 /* s2, s3, s4, s5, s6, s7, s8, s9, */
55 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
60 const char *abi_registers_integer_name[] = {
61 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
62 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
63 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
64 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
67 const s4 abi_registers_integer_argument[] = {
78 const s4 abi_registers_integer_saved[] = {
91 const s4 abi_registers_integer_temporary[] = {
103 s4 nregdescfloat[] = {
104 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
105 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
107 /* fa7, fa8, fa9, fa10, fa11, fa12, fs0, fs1, */
108 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_SAV, REG_SAV,
110 /*ftmp1, ftmp2, ft0, ft1, ft2, ft3, ft4, ft5, */
111 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
113 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
114 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
119 const s4 abi_registers_float_argument[] = {
135 const s4 abi_registers_float_saved[] = {
148 const s4 abi_registers_float_temporary[] = {
159 /* md_param_alloc **************************************************************
161 Allocate Arguments to Stackslots according the Calling Conventions
164 md->paramcount: Number of arguments for this method
165 md->paramtypes[].type: Argument types
168 md->params[].inmemory: Argument spilled on stack
169 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
170 md->memuse: Stackslots needed for argument spilling
171 md->argintreguse: max number of integer arguments used
172 md->argfltreguse: max number of float arguments used
174 *******************************************************************************/
176 void md_param_alloc(methoddesc *md)
184 /* set default values */
188 stacksize = LA_SIZE_IN_POINTERS;
190 /* get params field of methoddesc */
194 for (i = 0; i < md->paramcount; i++, pd++) {
195 switch (md->paramtypes[i].type) {
198 if (iarg < INT_ARG_CNT) {
199 pd->inmemory = false;
200 pd->regoff = abi_registers_integer_argument[iarg];
205 pd->regoff = stacksize * 4;
211 if (iarg < INT_ARG_CNT - 1) {
212 pd->inmemory = false;
214 PACK_REGS(abi_registers_integer_argument[iarg + 1],
215 abi_registers_integer_argument[iarg]);
220 pd->regoff = stacksize * 4;
227 if (farg < FLT_ARG_CNT) {
228 pd->inmemory = false;
229 pd->regoff = abi_registers_float_argument[farg];
230 iarg++; /* skip 1 integer argument register */
235 pd->regoff = stacksize * 4;
241 if (farg < FLT_ARG_CNT) {
242 pd->inmemory = false;
243 pd->regoff = abi_registers_float_argument[farg];
244 iarg += 2; /* skip 2 integer argument registers */
249 pd->regoff = stacksize * 4;
257 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return values, this */
258 /* argument register usage has to be regarded, too */
260 if (IS_INT_LNG_TYPE(md->returntype.type)) {
261 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
262 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
265 if (IS_FLT_DBL_TYPE(md->returntype.type))
270 /* fill register and stack usage */
272 md->argintreguse = iarg;
273 md->argfltreguse = farg;
274 md->memuse = stacksize;
278 /* md_param_alloc_native *******************************************************
280 Pre-allocate arguments according the native ABI.
282 *******************************************************************************/
284 void md_param_alloc_native(methoddesc *md)
286 /* On PowerPC we use the same ABI for JIT method calls as for
287 native method calls. */
293 /* md_return_alloc *************************************************************
295 Precolor the Java Stackelement containing the Return Value, if
296 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
300 jd: jitdata of the current method
301 stackslot: Java Stackslot to contain the Return Value
304 if precoloring was possible:
305 VAR(stackslot->varnum)->flags = PREALLOC
306 ->regoff = [REG_RESULT|REG_FRESULT]
307 rd->arg[flt|int]reguse set to a value according the register usage
309 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
311 *******************************************************************************/
313 void md_return_alloc(jitdata *jd, stackptr stackslot)
319 /* get required compiler data */
326 /* In Leafmethods Local Vars holding parameters are precolored to
327 their argument register -> so leafmethods with paramcount > 0
328 could already use R3 == a00! */
330 if (!jd->isleafmethod || (md->paramcount == 0)) {
331 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
332 has not to survive method invokations. */
334 if (!(stackslot->flags & SAVEDVAR)) {
336 VAR(stackslot->varnum)->flags = PREALLOC;
338 if (IS_INT_LNG_TYPE(md->returntype.type)) {
339 if (!IS_2_WORD_TYPE(md->returntype.type)) {
340 if (rd->argintreguse < 1)
341 rd->argintreguse = 1;
343 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
346 if (rd->argintreguse < 2)
347 rd->argintreguse = 2;
349 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
353 if (rd->argfltreguse < 1)
354 rd->argfltreguse = 1;
356 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
364 * These are local overrides for various environment variables in Emacs.
365 * Please do not remove this and leave it at the end of the file, where
366 * Emacs will automagically detect them.
367 * ---------------------------------------------------------------------
370 * indent-tabs-mode: t