1 /* src/vm/jit/powerpc/netbsd/md-abi.c - functions for PowerPC NetBSD 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
29 Changes: Christian Ullrich
37 #include "vm/jit/powerpc/netbsd/md-abi.h"
39 #include "vm/descriptor.h"
40 #include "vm/global.h"
41 #include "vm/jit/abi.h"
44 #define _ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
47 /* register descripton array **************************************************/
50 /* zero, sp, NO(sys), a0/v0, a0/v1, a2, a3, a4, */
51 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
53 /* a5, a6, a7, itmp1, itmp2, pv, s0, s1, */
54 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
56 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
57 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
59 /* s2, s3, s4, s5, s6, s7, s8, s9, */
60 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
66 s4 nregdescfloat[] = {
67 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
68 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
70 /* fa7, ft0, ft1, ft2, ft3, ft4, fs0, fs1, */
71 REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_SAV, REG_SAV,
73 /*ftmp1, ftmp2, ft5, ft6, ft7, ft8, ft9, ft10, */
74 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
76 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
77 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
83 /* md_param_alloc **************************************************************
85 Allocate Arguments to Stackslots according the Calling Conventions
88 md->paramcount: Number of arguments for this method
89 md->paramtypes[].type: Argument types
92 md->params[].inmemory: Argument spilled on stack
93 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
94 md->memuse: Stackslots needed for argument spilling
95 md->argintreguse: max number of integer arguments used
96 md->argfltreguse: max number of float arguments used
98 *******************************************************************************/
100 void md_param_alloc(methoddesc *md)
108 /* set default values */
112 stacksize = LA_WORD_SIZE;
114 /* get params field of methoddesc */
118 for (i = 0; i < md->paramcount; i++, pd++) {
119 switch (md->paramtypes[i].type) {
122 if (iarg < INT_ARG_CNT) {
123 pd->inmemory = false;
128 pd->regoff = stacksize * 4;
133 if (iarg < INT_ARG_CNT - 1) {
135 pd->inmemory = false;
136 /* rd->arg[int|flt]regs index !! */
137 pd->regoff = PACK_REGS(iarg + 1, iarg);
142 pd->regoff = stacksize * 4;
148 if (farg < FLT_ARG_CNT) {
149 pd->inmemory = false;
154 pd->regoff = stacksize * 4;
159 if (farg < FLT_ARG_CNT) {
160 pd->inmemory = false;
166 pd->regoff = stacksize * 4;
173 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return values, this */
174 /* argument register usage has to be regarded, too */
175 if (IS_INT_LNG_TYPE(md->returntype.type)) {
176 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
177 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
179 if (IS_FLT_DBL_TYPE(md->returntype.type))
184 /* fill register and stack usage */
186 md->argintreguse = iarg;
187 md->argfltreguse = farg;
188 md->memuse = stacksize;
192 /* md_return_alloc *************************************************************
194 Precolor the Java Stackelement containing the Return Value, if
195 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
199 jd: jitdata of current method
200 stackslot: Java Stackslot to contain the Return Value
203 if precoloring was possible:
204 VAR(stackslot->varnum)->flags = PREALLOC
205 VAR(stackslot->varnum)->vv.regoff = [REG_RESULT, (REG_RESULT2/REG_RESULT), REG_FRESULT]
206 rd->arg[flt|int]reguse set to a value according the register usage
208 *******************************************************************************/
210 void md_return_alloc(jitdata *jd, stackptr stackslot)
216 /* get required compiler data */
223 /* In Leafmethods Local Vars holding parameters are precolored to
224 their argument register -> so leafmethods with paramcount > 0
225 could already use R3 == a00! */
227 if (!m->isleafmethod || (md->paramcount == 0)) {
228 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
229 has not to survive method invokations. */
231 if (!(stackslot->flags & SAVEDVAR)) {
233 VAR(stackslot->varnum)->flags = PREALLOC;
235 if (IS_INT_LNG_TYPE(md->returntype.type)) {
236 if (!IS_2_WORD_TYPE(md->returntype.type)) {
237 if (rd->argintreguse < 1)
238 rd->argintreguse = 1;
240 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
243 if (rd->argintreguse < 2)
244 rd->argintreguse = 2;
246 VAR(stackslot->varnum)->vv.regoff = PACK_REGS(REG_RESULT2, REG_RESULT);
249 } else { /* float/double */
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