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 7367 2007-02-16 07:17:01Z pm $
39 #include "vm/jit/s390/md-abi.h"
41 #include "vmcore/descriptor.h"
42 #include "vm/global.h"
45 /* register descripton array **************************************************/
48 /* r0, itmp1, a0, a1, a2, a3, a4, s0, */
49 REG_TMP, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_SAV,
50 /* s1, s2, s3, s4, itmp2, pv, ra/itmp3, sp */
51 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_RES, REG_RES, REG_RES, REG_RES,
55 const char *abi_registers_integer_name[] = {
56 "r0", "r1", "r2", "r3",
57 "r4", "r5", "r6", "r7",
58 "r8", "r9", "r10", "r11",
59 "r12", "r13", "r14", "r15"
62 const s4 abi_registers_integer_argument[] = {
70 const s4 abi_registers_integer_saved[] = {
78 const s4 abi_registers_integer_temporary[] = {
82 s4 nregdescfloat[] = {
83 REG_ARG, REG_TMP, REG_ARG, REG_TMP, REG_SAV, REG_TMP, REG_SAV, REG_TMP,
84 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
88 const s4 abi_registers_float_argument[] = {
93 const s4 abi_registers_float_saved[] = {
98 const s4 abi_registers_float_temporary[] = {
113 /* md_param_alloc **************************************************************
117 *******************************************************************************/
119 void md_param_alloc(methoddesc *md)
127 /* set default values */
133 /* get params field of methoddesc */
137 for (i = 0; i < md->paramcount; i++, pd++) {
138 switch (md->paramtypes[i].type) {
142 if (iarg < INT_ARG_CNT) {
143 pd->inmemory = false;
148 pd->regoff = stacksize;
150 if (iarg < INT_ARG_CNT)
158 if (farg < FLT_ARG_CNT) {
159 pd->inmemory = false;
164 pd->regoff = stacksize;
166 if (farg < FLT_ARG_CNT)
174 /* Since XMM0 (==A0) is used for passing return values, this
175 argument register usage has to be regarded, too. */
177 if (IS_FLT_DBL_TYPE(md->returntype.type))
181 /* fill register and stack usage */
183 md->argintreguse = iarg;
184 md->argfltreguse = farg;
185 md->memuse = stacksize;
188 void md_param_alloc_native(methoddesc *md)
190 /* On PowerPC we use the same ABI for JIT method calls as for
191 * native method calls. */
197 /* md_return_alloc *************************************************************
199 Precolor the Java Stackelement containing the Return Value. Only
200 for float/ double types straight forward possible, since INT_LNG
201 types use "reserved" registers Float/Double values use a00 as
205 jd: jitdata of the current method
206 stackslot: Java Stackslot to contain the Return Value
209 if precoloring was possible:
210 VAR(stackslot->varnum)->flags = PREALLOC
211 ->vv.regoff = [REG_RESULT|REG_FRESULT]
212 rd->arg[flt|int]reguse set to a value according the register usage
214 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
216 *******************************************************************************/
218 void md_return_alloc(jitdata *jd, stackptr stackslot)
224 /* get required compiler data */
231 /* precoloring only straightforward possible with flt/dbl types
232 For Address/Integer/Long REG_RESULT == rax == REG_ITMP1 and so
233 could be destroyed if the return value Stack Slot "lives too
236 if (IS_FLT_DBL_TYPE(md->returntype.type)) {
237 /* In Leafmethods Local Vars holding parameters are precolored
238 to their argument register -> so leafmethods with
239 paramcount > 0 could already use a00! */
241 if (!jd->isleafmethod || (md->paramcount == 0)) {
242 /* Only precolor the stackslot, if it is not a SAVEDVAR
243 <-> has not to survive method invokations */
245 if (!(stackslot->flags & SAVEDVAR)) {
247 VAR(stackslot->varnum)->flags = PREALLOC;
250 if (rd->argfltreguse < 1)
251 rd->argfltreguse = 1;
253 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
261 * These are local overrides for various environment variables in Emacs.
262 * Please do not remove this and leave it at the end of the file, where
263 * Emacs will automagically detect them.
264 * ---------------------------------------------------------------------
267 * indent-tabs-mode: t