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
35 #include "vm/global.h"
36 #include "vm/jit/jit.h"
37 #include "vm/jit/s390/md-abi.h"
40 #include "vmcore/descriptor.h"
44 /* register descripton array **************************************************/
47 /* r0, itmp1, a0, a1, a2, a3, a4, s0, */
48 REG_TMP, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_SAV,
49 /* s1, s2, s3, s4, itmp2, pv, ra/itmp3, sp */
50 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_RES, REG_RES, REG_RES, REG_RES,
54 const char *abi_registers_integer_name[] = {
55 "r0", "r1", "r2", "r3",
56 "r4", "r5", "r6", "r7",
57 "r8", "r9", "r10", "r11",
58 "r12", "r13", "r14", "r15"
61 const s4 abi_registers_integer_argument[] = {
69 const s4 abi_registers_integer_saved[] = {
77 const s4 abi_registers_integer_temporary[] = {
81 s4 nregdescfloat[] = {
82 REG_ARG, REG_TMP, REG_ARG, REG_TMP, REG_RES, REG_TMP, REG_RES, REG_TMP,
83 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
87 const s4 abi_registers_float_argument[] = {
92 const s4 abi_registers_float_saved[] = {
96 const s4 abi_registers_float_temporary[] = {
111 /* md_param_alloc_intern *******************************************************
113 Allocates parameters to registers or stackslots for both native and java
117 slot: size in bytes of a stack slot
118 slots1w: number of stack slots used by a 1 word type parameter
119 slots2w: number of stack slots used by a 2 word type parameter
121 *******************************************************************************/
123 static void md_param_alloc_intern(methoddesc *md, s4 slot, s4 slots1w, s4 slots2w)
131 /* set default values */
137 /* get params field of methoddesc */
141 for (i = 0; i < md->paramcount; i++, pd++) {
142 switch (md->paramtypes[i].type) {
145 if (iarg < INT_ARG_CNT) {
146 pd->inmemory = false;
147 pd->regoff = abi_registers_integer_argument[iarg];
153 pd->regoff = stacksize * slot;
154 pd->index = stacksize;
155 stacksize += slots1w;
160 if (iarg < INT_ARG_CNT - 1) {
162 pd->inmemory = false;
164 PACK_REGS(abi_registers_integer_argument[iarg + 1],
165 abi_registers_integer_argument[iarg]);
166 pd->index = PACK_REGS(iarg + 1, iarg);
170 /* _ALIGN(stacksize); */
172 pd->regoff = stacksize * slot;
173 pd->index = stacksize;
175 stacksize += slots2w;
180 if (farg < FLT_ARG_CNT) {
181 pd->inmemory = false;
182 pd->regoff = abi_registers_float_argument[farg];
188 pd->regoff = stacksize * slot;
189 pd->index = stacksize;
190 stacksize += slots1w;
195 if (farg < FLT_ARG_CNT) {
196 pd->inmemory = false;
197 pd->regoff = abi_registers_float_argument[farg];
202 /* _ALIGN(stacksize); */
204 pd->regoff = stacksize * slot;
205 pd->index = stacksize;
206 stacksize += slots2w;
215 /* Since A0+A1/FA0 are used for passing return
216 values, this argument register usage has to be regarded,
219 if (IS_INT_LNG_TYPE(md->returntype.type)) {
220 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
221 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
224 if (IS_FLT_DBL_TYPE(md->returntype.type))
229 /* fill register and stack usage */
231 md->argintreguse = iarg;
232 md->argfltreguse = farg;
233 md->memuse = stacksize;
236 void md_param_alloc(methoddesc *md)
238 md_param_alloc_intern(md, 8, 1, 1);
241 void md_param_alloc_native(methoddesc *md)
243 md_param_alloc_intern(md, 4, 1, 2);
247 /* md_return_alloc *************************************************************
249 Precolor the Java Stackelement containing the Return Value. Only
250 for float/ double types straight forward possible, since INT_LNG
251 types use "reserved" registers Float/Double values use a00 as
255 jd: jitdata of the current method
256 stackslot: Java Stackslot to contain the Return Value
259 if precoloring was possible:
260 VAR(stackslot->varnum)->flags = PREALLOC
261 ->vv.regoff = [REG_RESULT|REG_FRESULT]
262 rd->arg[flt|int]reguse set to a value according the register usage
264 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
266 *******************************************************************************/
268 void md_return_alloc(jitdata *jd, stackptr stackslot)
274 /* get required compiler data */
281 /* In Leafmethods Local Vars holding parameters are precolored to
282 their argument register -> so leafmethods with paramcount > 0
283 could already use R3 == a00! */
285 if (!jd->isleafmethod || (md->paramcount == 0)) {
286 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
287 has not to survive method invokations. */
289 if (!(stackslot->flags & SAVEDVAR)) {
290 VAR(stackslot->varnum)->flags = PREALLOC;
292 if (IS_INT_LNG_TYPE(md->returntype.type)) {
293 if (!IS_2_WORD_TYPE(md->returntype.type)) {
294 if (rd->argintreguse < 1)
295 rd->argintreguse = 1;
297 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
300 if (rd->argintreguse < 2)
301 rd->argintreguse = 2;
303 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
306 else { /* float/double */
307 if (rd->argfltreguse < 1)
308 rd->argfltreguse = 1;
310 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
318 * These are local overrides for various environment variables in Emacs.
319 * Please do not remove this and leave it at the end of the file, where
320 * Emacs will automagically detect them.
321 * ---------------------------------------------------------------------
324 * indent-tabs-mode: t