1 /* src/vm/jit/x86_64/md-abi.c - functions for x86_64 Linux ABI
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: Christian Thalinger
31 $Id: md-abi.c 7581 2007-03-26 07:23:16Z pm $
39 #include "vm/jit/s390/md-abi.h"
41 #include "vmcore/descriptor.h"
42 #include "vm/global.h"
43 #include "vm/jit/jit.h"
46 /* register descripton array **************************************************/
49 /* r0, itmp1, a0, a1, a2, a3, a4, s0, */
50 REG_TMP, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_SAV,
51 /* s1, s2, s3, s4, itmp2, pv, ra/itmp3, sp */
52 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_RES, REG_RES, REG_RES, REG_RES,
56 const char *abi_registers_integer_name[] = {
57 "r0", "r1", "r2", "r3",
58 "r4", "r5", "r6", "r7",
59 "r8", "r9", "r10", "r11",
60 "r12", "r13", "r14", "r15"
63 const s4 abi_registers_integer_argument[] = {
71 const s4 abi_registers_integer_saved[] = {
79 const s4 abi_registers_integer_temporary[] = {
83 s4 nregdescfloat[] = {
84 REG_ARG, REG_TMP, REG_ARG, REG_TMP, REG_RES, REG_TMP, REG_RES, REG_TMP,
85 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
89 const s4 abi_registers_float_argument[] = {
94 const s4 abi_registers_float_saved[] = {
99 const s4 abi_registers_float_temporary[] = {
114 /* md_param_alloc **************************************************************
118 *******************************************************************************/
120 void md_param_alloc(methoddesc *md)
128 /* set default values */
134 /* get params field of methoddesc */
138 for (i = 0; i < md->paramcount; i++, pd++) {
139 switch (md->paramtypes[i].type) {
142 if (iarg < INT_ARG_CNT) {
143 pd->inmemory = false;
144 /* pd->regoff = abi_registers_integer_argument[iarg]; */
150 pd->regoff = stacksize;
156 if (iarg < INT_ARG_CNT - 1) {
158 pd->inmemory = false;
160 /* PACK_REGS(abi_registers_integer_argument[iarg + 1], */
161 /* abi_registers_integer_argument[iarg]); */
162 pd->regoff = PACK_REGS(iarg + 1, iarg);
166 /* _ALIGN(stacksize); */
168 pd->regoff = stacksize;
175 if (farg < FLT_ARG_CNT) {
176 pd->inmemory = false;
177 /* pd->regoff = abi_registers_float_argument[farg]; */
183 pd->regoff = stacksize;
189 if (farg < FLT_ARG_CNT) {
190 pd->inmemory = false;
191 /* pd->regoff = abi_registers_integer_argument[farg]; */
196 /* _ALIGN(stacksize); */
198 pd->regoff = stacksize;
208 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return
209 values, this argument register usage has to be regarded,
212 if (IS_INT_LNG_TYPE(md->returntype.type)) {
213 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
214 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
217 if (IS_FLT_DBL_TYPE(md->returntype.type))
222 /* fill register and stack usage */
224 md->argintreguse = iarg;
225 md->argfltreguse = farg;
226 md->memuse = stacksize;
229 void md_param_alloc_native(methoddesc *md)
231 /* On PowerPC we use the same ABI for JIT method calls as for
232 * native method calls. */
238 /* md_return_alloc *************************************************************
240 Precolor the Java Stackelement containing the Return Value. Only
241 for float/ double types straight forward possible, since INT_LNG
242 types use "reserved" registers Float/Double values use a00 as
246 jd: jitdata of the current method
247 stackslot: Java Stackslot to contain the Return Value
250 if precoloring was possible:
251 VAR(stackslot->varnum)->flags = PREALLOC
252 ->vv.regoff = [REG_RESULT|REG_FRESULT]
253 rd->arg[flt|int]reguse set to a value according the register usage
255 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
257 *******************************************************************************/
259 void md_return_alloc(jitdata *jd, stackptr stackslot)
265 /* get required compiler data */
272 /* In Leafmethods Local Vars holding parameters are precolored to
273 their argument register -> so leafmethods with paramcount > 0
274 could already use R3 == a00! */
276 if (!jd->isleafmethod || (md->paramcount == 0)) {
277 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
278 has not to survive method invokations. */
280 if (!(stackslot->flags & SAVEDVAR)) {
281 VAR(stackslot->varnum)->flags = PREALLOC;
283 if (IS_INT_LNG_TYPE(md->returntype.type)) {
284 if (!IS_2_WORD_TYPE(md->returntype.type)) {
285 if (rd->argintreguse < 1)
286 rd->argintreguse = 1;
288 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
291 if (rd->argintreguse < 2)
292 rd->argintreguse = 2;
294 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
297 else { /* float/double */
298 if (rd->argfltreguse < 1)
299 rd->argfltreguse = 1;
301 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
309 * These are local overrides for various environment variables in Emacs.
310 * Please do not remove this and leave it at the end of the file, where
311 * Emacs will automagically detect them.
312 * ---------------------------------------------------------------------
315 * indent-tabs-mode: t