1 /* src/vm/jit/powerpc64/linux/md-abi.c - functions for PowerPC64 Linux ABI
3 Copyright (C) 1996-2005, 2006, 2007 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 $Id: md-abi.c 7311 2007-02-09 13:20:27Z twisti $
36 #include "vm/jit/powerpc64/linux/md-abi.h"
38 #include "vm/global.h"
40 #include "vm/jit/abi.h"
42 #include "vmcore/descriptor.h"
44 #define CACAO_ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
47 /* register descripton array **************************************************/
50 /* zero, sp, TOC, a0/v0, a1/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, NO(SYS), pv, s0, */
54 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_RES, 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 /* s1, s2, s3, s4, s5, s6, s7, s8, */
60 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
66 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
67 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
68 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
69 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
73 s4 nregdescfloat[] = {
74 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
75 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
77 /* fa7, fa8, fa9, fa10, fa11, fa12, ftmp1, ftmp2, */
78 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES,
80 /* fs0, fs1, fs2, fs3, fs4, fs5, fs6, fs7 */
81 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
83 /* fs8, fs9, fs10, fs11, fs12, fs13, fs14, fs15 */
84 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)
114 s4 stacksize, stackcount;
117 /* set default values */
122 stacksize = LA_SIZE_IN_POINTERS;
125 /* get params field of methoddesc */
129 for (i = 0; i < md->paramcount; i++, pd++) {
130 switch (md->paramtypes[i].type) {
134 if (iarg < INT_ARG_CNT) {
135 pd->inmemory = false;
140 pd->regoff = stacksize + stackcount;
145 if (farg < FLT_ARG_CNT) {
146 pd->inmemory = false;
149 if (arg < INT_ARG_CNT) {
150 iarg++; /* yes, that is true, floating arguments take int register slots away */
154 pd->regoff = stacksize + stackcount ;
164 /* Since R3, F1 (==A0, A0) are used for passing return values, this */
165 /* argument register usage has to be regarded, too */
166 if (IS_INT_LNG_TYPE(md->returntype.type)) {
169 } else if (IS_FLT_DBL_TYPE(md->returntype.type)) {
174 /* fill register and stack usage, parameter areas is at least PA_SIZE_IN_POINTERS */
176 md->argintreguse = iarg;
177 md->argfltreguse = farg;
178 md->memuse = stacksize + (stackcount<PA_SIZE_IN_POINTERS? PA_SIZE_IN_POINTERS: stackcount);
182 /* md_return_alloc *************************************************************
184 Precolor the Java Stackelement containing the Return Value, if
185 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
189 jd: jitdata of the current method
190 stackslot: Java Stackslot to contain the Return Value
193 if precoloring was possible:
194 VAR(stackslot->varnum)->flags = PREALLOC
195 VAR(stackslot->varnum)->vv.regoff = [REG_RESULT, REG_FRESULT]
196 rd->arg[flt|int]reguse set to a value according the register usage
198 *******************************************************************************/
200 void md_return_alloc(jitdata *jd, stackptr stackslot)
207 /* get required compiler data */
215 /* In Leafmethods Local Vars holding parameters are precolored to
216 their argument register -> so leafmethods with paramcount > 0
217 could already use R3 == a00! */
219 if (!jd->isleafmethod || (md->paramcount == 0)) {
220 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
221 has not to survive method invokations. */
223 if (!(stackslot->flags & SAVEDVAR)) {
225 VAR(stackslot->varnum)->flags = PREALLOC;
227 if (IS_INT_LNG_TYPE(md->returntype.type)) {
228 if (rd->argintreguse < 1)
229 rd->argintreguse = 1;
231 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
232 } else { /* float/double */
233 if (rd->argfltreguse < 1)
234 rd->argfltreguse = 1;
236 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
244 * These are local overrides for various environment variables in Emacs.
245 * Please do not remove this and leave it at the end of the file, where
246 * Emacs will automagically detect them.
247 * ---------------------------------------------------------------------
250 * indent-tabs-mode: t