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 5232 2006-08-11 13:11:44Z tbfg $
39 #include "vm/jit/powerpc64/linux/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
43 #include "vm/jit/abi.h"
46 #define _ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
49 /* register descripton array **************************************************/
52 /* zero, sp, TOC, a0/v0, a0/v1, a2, a3, a4, */
53 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
55 /* a5, a6, a7, itmp1, itmp2, NO(SYS), pv, s0, */
56 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV,
58 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
59 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
61 /* s1, s2, s3, s4, s5, s6, s7, s8, */
62 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
68 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
69 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
70 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
71 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
75 s4 nregdescfloat[] = {
76 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
77 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
79 /* fa7, ft0, ft1, ft2, ft3, ft4, fs0, fs1, */
80 REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_SAV, REG_SAV,
82 /*ftmp1, ftmp2, ft5, ft6, ft7, ft8, ft9, ft10, */
83 REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
85 /* fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9 */
86 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
91 /* md_param_alloc **************************************************************
93 Allocate Arguments to Stackslots according the Calling Conventions
96 md->paramcount: Number of arguments for this method
97 md->paramtypes[].type: Argument types
100 md->params[].inmemory: Argument spilled on stack
101 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
102 md->memuse: Stackslots needed for argument spilling
103 md->argintreguse: max number of integer arguments used
104 md->argfltreguse: max number of float arguments used
106 *******************************************************************************/
108 void md_param_alloc(methoddesc *md)
116 /* set default values */
120 stacksize = LA_SIZE_IN_POINTERS;
122 /* get params field of methoddesc */
126 for (i = 0; i < md->paramcount; i++, pd++) {
127 switch (md->paramtypes[i].type) {
130 if (iarg < INT_ARG_CNT) {
131 pd->inmemory = false;
136 pd->regoff = stacksize;
141 if (iarg < INT_ARG_CNT - 1) {
143 pd->inmemory = false;
144 /* rd->arg[int|flt]regs index !! */
145 pd->regoff = PACK_REGS(iarg + 1, iarg);
150 pd->regoff = stacksize;
156 if (farg < FLT_ARG_CNT) {
157 pd->inmemory = false;
162 pd->regoff = stacksize;
167 if (farg < FLT_ARG_CNT) {
168 pd->inmemory = false;
174 pd->regoff = stacksize;
181 /* Since R3/R4, F1 (==A0/A1, A0) are used for passing return values, this */
182 /* argument register usage has to be regarded, too */
183 if (IS_INT_LNG_TYPE(md->returntype.type)) {
184 if (iarg < (IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1))
185 iarg = IS_2_WORD_TYPE(md->returntype.type) ? 2 : 1;
187 if (IS_FLT_DBL_TYPE(md->returntype.type))
192 /* fill register and stack usage */
194 md->argintreguse = iarg;
195 md->argfltreguse = farg;
196 md->memuse = stacksize;
200 /* md_return_alloc *************************************************************
202 Precolor the Java Stackelement containing the Return Value, if
203 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
207 m: Methodinfo of current method
208 return_type: Return Type of the Method (TYPE_INT.. TYPE_ADR)
209 TYPE_VOID is not allowed!
210 stackslot: Java Stackslot to contain the Return Value
213 if precoloring was possible:
214 stackslot->varkind =ARGVAR
217 ->regoff =[REG_RESULT, (REG_RESULT2/REG_RESULT), REG_FRESULT]
218 rd->arg[flt|int]reguse set to a value according the register usage
220 *******************************************************************************/
222 void md_return_alloc(jitdata *jd, stackptr stackslot)
229 /* get required compiler data */
237 /* In Leafmethods Local Vars holding parameters are precolored to
238 their argument register -> so leafmethods with paramcount > 0
239 could already use R3 == 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)) {
246 stackslot->varkind = ARGVAR;
247 stackslot->varnum = -1;
248 stackslot->flags = 0;
250 if (IS_INT_LNG_TYPE(md->returntype.type)) {
251 if (!IS_2_WORD_TYPE(md->returntype.type)) {
252 if (rd->argintreguse < 1)
253 rd->argintreguse = 1;
255 stackslot->regoff = REG_RESULT;
258 if (rd->argintreguse < 2)
259 rd->argintreguse = 2;
261 /* stackslot->regoff = PACK_REGS(REG_RESULT2, REG_RESULT); // FIXME */
264 } else { /* float/double */
265 if (rd->argfltreguse < 1)
266 rd->argfltreguse = 1;
268 stackslot->regoff = REG_FRESULT;
276 * These are local overrides for various environment variables in Emacs.
277 * Please do not remove this and leave it at the end of the file, where
278 * Emacs will automagically detect them.
279 * ---------------------------------------------------------------------
282 * indent-tabs-mode: t