1 /* src/vm/jit/powerpc64/linux/md-abi.c - functions for PowerPC64 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
31 $Id: md-abi.c 5082 2006-07-06 14:10:23Z tbfg $
39 #include "vm/jit/powerpc64/linux/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
45 #define _ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
48 /* register descripton array **************************************************/
51 /* zero, sp, TOC, a0/v0, a0/v1, a2, a3, a4, */
52 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
54 /* a5, a6, a7, itmp1, itmp2, NO(SYS), pv, s0, */
55 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
57 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
58 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
60 /* s1, s2, s3, s4, s5, s6, s7, s8, */
61 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
67 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
68 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
69 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
70 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
74 s4 nregdescfloat[] = {
75 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
76 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
78 /* fa7, ft0, ft1, ft2, ft3, ft4, fs0, fs1, */
79 REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_SAV, REG_SAV,
81 /*ftmp1, ftmp2, ft5, ft6, ft7, ft8, ft9, ft10, */
82 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
84 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
85 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
90 /* md_param_alloc **************************************************************
92 Allocate Arguments to Stackslots according the Calling Conventions
95 md->paramcount: Number of arguments for this method
96 md->paramtypes[].type: Argument types
99 md->params[].inmemory: Argument spilled on stack
100 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
101 md->memuse: Stackslots needed for argument spilling
102 md->argintreguse: max number of integer arguments used
103 md->argfltreguse: max number of float arguments used
105 *******************************************************************************/
107 void md_param_alloc(methoddesc *md)
115 /* set default values */
119 stacksize = LA_WORD_SIZE;
121 /* get params field of methoddesc */
125 for (i = 0; i < md->paramcount; i++, pd++) {
126 switch (md->paramtypes[i].type) {
129 if (iarg < INT_ARG_CNT) {
130 pd->inmemory = false;
135 pd->regoff = stacksize;
140 if (iarg < INT_ARG_CNT - 1) {
142 pd->inmemory = false;
143 /* rd->arg[int|flt]regs index !! */
144 pd->regoff = PACK_REGS(iarg + 1, iarg);
149 pd->regoff = stacksize;
155 if (farg < FLT_ARG_CNT) {
156 pd->inmemory = false;
161 pd->regoff = stacksize;
166 if (farg < FLT_ARG_CNT) {
167 pd->inmemory = false;
173 pd->regoff = stacksize;
180 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return values, this */
181 /* argument register usage has to be regarded, too */
182 if (IS_INT_LNG_TYPE(md->returntype.type)) {
183 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
184 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
186 if (IS_FLT_DBL_TYPE(md->returntype.type))
191 /* fill register and stack usage */
193 md->argintreguse = iarg;
194 md->argfltreguse = farg;
195 md->memuse = stacksize;
199 /* md_return_alloc *************************************************************
201 Precolor the Java Stackelement containing the Return Value, if
202 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
206 m: Methodinfo of current method
207 return_type: Return Type of the Method (TYPE_INT.. TYPE_ADR)
208 TYPE_VOID is not allowed!
209 stackslot: Java Stackslot to contain the Return Value
212 if precoloring was possible:
213 stackslot->varkind =ARGVAR
216 ->regoff =[REG_RESULT, (REG_RESULT2/REG_RESULT), REG_FRESULT]
217 rd->arg[flt|int]reguse set to a value according the register usage
219 *******************************************************************************/
221 void md_return_alloc(jitdata *jd, stackptr stackslot)
228 /* get required compiler data */
236 /* In Leafmethods Local Vars holding parameters are precolored to
237 their argument register -> so leafmethods with paramcount > 0
238 could already use R3 == a00! */
240 if (!code->isleafmethod || (md->paramcount == 0)) {
241 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
242 has not to survive method invokations. */
244 if (!(stackslot->flags & SAVEDVAR)) {
245 stackslot->varkind = ARGVAR;
246 stackslot->varnum = -1;
247 stackslot->flags = 0;
249 if (IS_INT_LNG_TYPE(md->returntype.type)) {
250 if (!IS_2_WORD_TYPE(md->returntype.type)) {
251 if (rd->argintreguse < 1)
252 rd->argintreguse = 1;
254 stackslot->regoff = REG_RESULT;
257 if (rd->argintreguse < 2)
258 rd->argintreguse = 2;
260 /* stackslot->regoff = PACK_REGS(REG_RESULT2, REG_RESULT); // FIXME */
263 } else { /* float/double */
264 if (rd->argfltreguse < 1)
265 rd->argfltreguse = 1;
267 stackslot->regoff = REG_FRESULT;
275 * These are local overrides for various environment variables in Emacs.
276 * Please do not remove this and leave it at the end of the file, where
277 * Emacs will automagically detect them.
278 * ---------------------------------------------------------------------
281 * indent-tabs-mode: t