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 5978 2006-11-13 21:43:41Z 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"
47 #define CACAO_ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
50 /* register descripton array **************************************************/
53 /* zero, sp, TOC, a0/v0, a1/v1, a2, a3, a4, */
54 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
56 /* a5, a6, a7, itmp1, itmp2, NO(SYS), pv, s0, */
57 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_RES, REG_SAV,
59 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
60 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
62 /* s1, s2, s3, s4, s5, s6, s7, s8, */
63 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
69 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
70 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
71 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
72 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
76 s4 nregdescfloat[] = {
77 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
78 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
80 /* fa7, fa8, fa9, fa10, fa11, fa12, ftmp1, ftmp2, */
81 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES,
83 /* fs0, fs1, fs2, fs3, fs4, fs5, fs6, fs7 */
84 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
86 /* fs8, fs9, fs10, fs11, fs12, fs13, fs14, fs15 */
87 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
93 /* md_param_alloc **************************************************************
95 Allocate Arguments to Stackslots according the Calling Conventions
98 md->paramcount: Number of arguments for this method
99 md->paramtypes[].type: Argument types
102 md->params[].inmemory: Argument spilled on stack
103 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
104 md->memuse: Stackslots needed for argument spilling
105 md->argintreguse: max number of integer arguments used
106 md->argfltreguse: max number of float arguments used
108 *******************************************************************************/
110 void md_param_alloc(methoddesc *md)
117 s4 stacksize, stackcount;
120 /* set default values */
125 stacksize = LA_SIZE_IN_POINTERS + PA_SIZE_IN_POINTERS;
128 /* get params field of methoddesc */
132 for (i = 0; i < md->paramcount; i++, pd++) {
133 switch (md->paramtypes[i].type) {
137 if (arg < INT_ARG_CNT) {
138 pd->inmemory = false;
143 pd->regoff = stacksize + stackcount;
149 if (farg < FLT_ARG_CNT) {
150 pd->inmemory = false;
153 if (arg < INT_ARG_CNT) {
154 iarg++; /* yes, that is true, floating arguments take int register slots away */
159 pd->regoff = stacksize + stackcount + 1;
169 /* Since R3, F1 (==A0, A0) are used for passing return values, this */
170 /* argument register usage has to be regarded, too */
171 if (IS_INT_LNG_TYPE(md->returntype.type)) {
174 } else if (IS_FLT_DBL_TYPE(md->returntype.type)) {
179 /* fill register and stack usage */
181 md->argintreguse = iarg;
182 md->argfltreguse = farg;
183 md->memuse = stacksize + stackcount;
187 /* md_return_alloc *************************************************************
189 Precolor the Java Stackelement containing the Return Value, if
190 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
194 jd: jitdata of the current method
195 stackslot: Java Stackslot to contain the Return Value
198 if precoloring was possible:
199 VAR(stackslot->varnum)->flags = PREALLOC
200 VAR(stackslot->varnum)->vv.regoff = [REG_RESULT, REG_FRESULT]
201 rd->arg[flt|int]reguse set to a value according the register usage
203 *******************************************************************************/
205 void md_return_alloc(jitdata *jd, stackptr stackslot)
212 /* get required compiler data */
220 /* In Leafmethods Local Vars holding parameters are precolored to
221 their argument register -> so leafmethods with paramcount > 0
222 could already use R3 == a00! */
224 if (!jd->isleafmethod || (md->paramcount == 0)) {
225 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
226 has not to survive method invokations. */
228 if (!(stackslot->flags & SAVEDVAR)) {
230 VAR(stackslot->varnum)->flags = PREALLOC;
232 if (IS_INT_LNG_TYPE(md->returntype.type)) {
233 if (rd->argintreguse < 1)
234 rd->argintreguse = 1;
236 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
237 } else { /* float/double */
238 if (rd->argfltreguse < 1)
239 rd->argfltreguse = 1;
241 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
249 * These are local overrides for various environment variables in Emacs.
250 * Please do not remove this and leave it at the end of the file, where
251 * Emacs will automagically detect them.
252 * ---------------------------------------------------------------------
255 * indent-tabs-mode: t