1 /* src/vm/jit/powerpc/netbsd/md-abi.c - PowerPC NetBSD ABI
3 Copyright (C) 1996-2005, 2006, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
29 #include "vm/jit/powerpc/netbsd/md-abi.h"
31 #include "vm/descriptor.hpp"
32 #include "vm/global.h"
34 #include "vm/jit/abi.h"
35 #include "vm/jit/stack.h"
38 #define _ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
41 /* register descripton array **************************************************/
44 /* zero, sp, NO(sys), a0/v0, a0/v1, a2, a3, a4, */
45 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
47 /* a5, a6, a7, itmp1, itmp2, pv, s0, s1, */
48 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
50 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
51 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
53 /* s2, s3, s4, s5, s6, s7, s8, s9, */
54 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
60 s4 nregdescfloat[] = {
61 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
62 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
64 /* fa7, ft0, ft1, ft2, ft3, ft4, fs0, fs1, */
65 REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_SAV, REG_SAV,
67 /*ftmp1, ftmp2, ft5, ft6, ft7, ft8, ft9, ft10, */
68 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
70 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
71 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
77 /* md_param_alloc **************************************************************
79 Allocate Arguments to Stackslots according the Calling Conventions
82 md->paramcount: Number of arguments for this method
83 md->paramtypes[].type: Argument types
86 md->params[].inmemory: Argument spilled on stack
87 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
88 md->memuse: Stackslots needed for argument spilling
89 md->argintreguse: max number of integer arguments used
90 md->argfltreguse: max number of float arguments used
92 *******************************************************************************/
94 void md_param_alloc(methoddesc *md)
102 /* set default values */
106 stacksize = LA_WORD_SIZE;
108 /* get params field of methoddesc */
112 for (i = 0; i < md->paramcount; i++, pd++) {
113 switch (md->paramtypes[i].type) {
116 if (iarg < INT_ARG_CNT) {
117 pd->inmemory = false;
122 pd->regoff = stacksize * 4;
127 if (iarg < INT_ARG_CNT - 1) {
129 pd->inmemory = false;
130 /* rd->arg[int|flt]regs index !! */
131 pd->regoff = PACK_REGS(iarg + 1, iarg);
136 pd->regoff = stacksize * 4;
142 if (farg < FLT_ARG_CNT) {
143 pd->inmemory = false;
148 pd->regoff = stacksize * 4;
153 if (farg < FLT_ARG_CNT) {
154 pd->inmemory = false;
160 pd->regoff = stacksize * 4;
167 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return values, this */
168 /* argument register usage has to be regarded, too */
169 if (IS_INT_LNG_TYPE(md->returntype.type)) {
170 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
171 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
173 if (IS_FLT_DBL_TYPE(md->returntype.type))
178 /* fill register and stack usage */
180 md->argintreguse = iarg;
181 md->argfltreguse = farg;
182 md->memuse = stacksize;
186 /* md_return_alloc *************************************************************
188 Precolor the Java Stackelement containing the Return Value, if
189 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
193 jd: jitdata of current method
194 stackslot: Java Stackslot to contain the Return Value
197 if precoloring was possible:
198 VAR(stackslot->varnum)->flags = PREALLOC
199 VAR(stackslot->varnum)->vv.regoff = [REG_RESULT, (REG_RESULT2/REG_RESULT), REG_FRESULT]
200 rd->arg[flt|int]reguse set to a value according the register usage
202 *******************************************************************************/
204 void md_return_alloc(jitdata *jd, stackelement_t* stackslot)
210 /* get required compiler data */
217 /* In Leafmethods Local Vars holding parameters are precolored to
218 their argument register -> so leafmethods with paramcount > 0
219 could already use R3 == a00! */
221 if (!m->isleafmethod || (md->paramcount == 0)) {
222 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
223 has not to survive method invokations. */
225 if (!(stackslot->flags & SAVEDVAR)) {
227 VAR(stackslot->varnum)->flags = PREALLOC;
229 if (IS_INT_LNG_TYPE(md->returntype.type)) {
230 if (!IS_2_WORD_TYPE(md->returntype.type)) {
231 if (rd->argintreguse < 1)
232 rd->argintreguse = 1;
234 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
237 if (rd->argintreguse < 2)
238 rd->argintreguse = 2;
240 VAR(stackslot->varnum)->vv.regoff = PACK_REGS(REG_RESULT2, REG_RESULT);
243 } else { /* float/double */
244 if (rd->argfltreguse < 1)
245 rd->argfltreguse = 1;
247 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
255 * These are local overrides for various environment variables in Emacs.
256 * Please do not remove this and leave it at the end of the file, where
257 * Emacs will automagically detect them.
258 * ---------------------------------------------------------------------
261 * indent-tabs-mode: t