1 /* src/vm/jit/reg.c - register allocator setup
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
37 #include "mm/memory.h"
38 #include "vm/jit/abi.h"
39 #include "vm/jit/reg.h"
42 /* reg_setup *******************************************************************
46 *******************************************************************************/
48 void reg_setup(jitdata *jd)
54 /* get required compiler data */
59 /* setup the integer register table */
61 rd->tmpintregs = DMNEW(s4, INT_TMP_CNT);
62 rd->savintregs = DMNEW(s4, INT_SAV_CNT);
63 rd->freeargintregs = DMNEW(s4, INT_ARG_CNT);
64 rd->freetmpintregs = DMNEW(s4, INT_TMP_CNT);
65 rd->freesavintregs = DMNEW(s4, INT_SAV_CNT);
71 for (i = 0; i < INT_REG_CNT; i++) {
72 switch (nregdescint[i]) {
77 rd->savintregs[rd->savintreguse++] = i;
80 rd->tmpintregs[rd->tmpintreguse++] = i;
84 assert(rd->savintreguse == INT_SAV_CNT);
85 assert(rd->tmpintreguse == INT_TMP_CNT);
87 #ifdef HAS_ADDRESS_REGISTER_FILE
88 /* setup the address register table */
90 rd->argadrregs = DMNEW(s4, ADR_ARG_CNT);
91 rd->tmpadrregs = DMNEW(s4, ADR_TMP_CNT);
92 rd->savadrregs = DMNEW(s4, ADR_SAV_CNT);
93 rd->freeargadrregs = DMNEW(s4, ADR_ARG_CNT);
94 rd->freetmpadrregs = DMNEW(s4, ADR_TMP_CNT);
95 rd->freesavadrregs = DMNEW(s4, ADR_SAV_CNT);
97 /*rd->adrreg_argnum = 0; XXX ask twisti */
100 rd->savadrreguse = 0;
102 for (i = 0; i < ADR_REG_CNT; i++) {
103 switch (nregdescadr[i]) {
108 rd->savadrregs[rd->savadrreguse++] = i;
111 rd->tmpadrregs[rd->tmpadrreguse++] = i;
114 rd->argadrregs[rd->argadrreguse++] = i;
118 assert(rd->savadrreguse == ADR_SAV_CNT);
119 assert(rd->tmpadrreguse == ADR_TMP_CNT);
120 assert(rd->argadrreguse == ADR_ARG_CNT);
123 /* setup the float register table */
125 rd->tmpfltregs = DMNEW(s4, FLT_TMP_CNT);
126 rd->savfltregs = DMNEW(s4, FLT_SAV_CNT);
127 rd->freeargfltregs = DMNEW(s4, FLT_ARG_CNT);
128 rd->freetmpfltregs = DMNEW(s4, FLT_TMP_CNT);
129 rd->freesavfltregs = DMNEW(s4, FLT_SAV_CNT);
131 rd->argfltreguse = 0;
132 rd->tmpfltreguse = 0;
133 rd->savfltreguse = 0;
135 for (i = 0; i < FLT_REG_CNT; i++) {
136 switch (nregdescfloat[i]) {
141 rd->savfltregs[rd->savfltreguse++] = i;
144 rd->tmpfltregs[rd->tmpfltreguse++] = i;
148 assert(rd->savfltreguse == FLT_SAV_CNT);
149 assert(rd->tmpfltreguse == FLT_TMP_CNT);
151 rd->freemem = DMNEW(s4, m->maxstack);
153 #if defined(SPECIALMEMUSE)
154 # if defined(__DARWIN__)
155 /* 6*4=24 byte linkage area + 8*4=32 byte minimum parameter Area */
156 rd->memuse = LA_SIZE_IN_POINTERS + INT_ARG_CNT;
158 rd->memuse = LA_SIZE_IN_POINTERS;
161 rd->memuse = 0; /* init to zero -> analyse_stack will set it to a higher */
162 /* value, if appropriate */
165 /* Set rd->arg*reguse to *_ARG_CNBT to not use unused argument */
166 /* registers as temp registers */
167 #if defined(HAS_ADDRESS_REGISTER_FILE)
168 rd->argadrreguse = 0;
169 #endif /* defined(HAS_ADDRESS_REGISTER_FILE) */
170 rd->argintreguse = 0;
171 rd->argfltreguse = 0;
176 * These are local overrides for various environment variables in Emacs.
177 * Please do not remove this and leave it at the end of the file, where
178 * Emacs will automagically detect them.
179 * ---------------------------------------------------------------------
182 * indent-tabs-mode: t
186 * vim:noexpandtab:sw=4:ts=4: