1 /* src/vm/jit/reg.c - register allocator setup
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
27 Authors: Andreas Krall
34 $Id: reg.c 4357 2006-01-22 23:33:38Z twisti $
48 #include "mm/memory.h"
49 #include "vm/jit/reg.h"
52 /* reg_setup *******************************************************************
56 *******************************************************************************/
58 void reg_setup(methodinfo *m, registerdata *rd, t_inlining_globals *id)
63 /* setup the integer register table */
66 /* On ARM longs can be split across argument regs and stack. This is
67 * signed by setting the HIGH_REG to INT_ARG_CNT in md_param_alloc().
68 * Here we make sure it resolves to a special dummy reg (REG_SPLIT). */
69 rd->argintregs = DMNEW(s4, INT_ARG_CNT + 1);
70 rd->argintregs[INT_ARG_CNT] = REG_SPLIT;
72 rd->argintregs = DMNEW(s4, INT_ARG_CNT);
74 rd->tmpintregs = DMNEW(s4, INT_TMP_CNT);
75 rd->savintregs = DMNEW(s4, INT_SAV_CNT);
76 rd->freeargintregs = DMNEW(s4, INT_ARG_CNT);
77 rd->freetmpintregs = DMNEW(s4, INT_TMP_CNT);
78 rd->freesavintregs = DMNEW(s4, INT_SAV_CNT);
84 for (i = 0; i < INT_REG_CNT; i++) {
85 switch (nregdescint[i]) {
90 rd->savintregs[rd->savintreguse++] = i;
93 rd->tmpintregs[rd->tmpintreguse++] = i;
96 rd->argintregs[rd->argintreguse++] = i;
100 assert(rd->savintreguse == INT_SAV_CNT);
101 assert(rd->tmpintreguse == INT_TMP_CNT);
102 assert(rd->argintreguse == INT_ARG_CNT);
104 #if defined(__X86_64__)
106 * on x86_64 the argument registers are not in ascending order
107 * a00 (%rdi) <-> a03 (%rcx) and a01 (%rsi) <-> a02 (%rdx)
109 i = rd->argintregs[3];
110 rd->argintregs[3] = rd->argintregs[0];
111 rd->argintregs[0] = i;
113 i = rd->argintregs[2];
114 rd->argintregs[2] = rd->argintregs[1];
115 rd->argintregs[1] = i;
118 #ifdef HAS_ADDRESS_REGISTER_FILE
119 /* setup the address register table */
121 rd->argadrregs = DMNEW(s4, ADR_ARG_CNT);
122 rd->tmpadrregs = DMNEW(s4, ADR_TMP_CNT);
123 rd->savadrregs = DMNEW(s4, ADR_SAV_CNT);
124 rd->freeargadrregs = DMNEW(s4, ADR_ARG_CNT);
125 rd->freetmpadrregs = DMNEW(s4, ADR_TMP_CNT);
126 rd->freesavadrregs = DMNEW(s4, ADR_SAV_CNT);
128 rd->adrreg_argnum = 0;
129 rd->argadrreguse = 0;
130 rd->tmpadrreguse = 0;
131 rd->savadrreguse = 0;
133 for (i = 0; i < ADR_REG_CNT; i++) {
134 switch (nregdescadr[i]) {
139 rd->savadrregs[rd->savadrreguse++] = i;
142 rd->tmpadrregs[rd->tmpadrreguse++] = i;
145 rd->argadrregs[rd->argadrreguse++] = i;
149 assert(rd->savadrreguse == ADR_SAV_CNT);
150 assert(rd->tmpadrreguse == ADR_TMP_CNT);
151 assert(rd->argadrreguse == ADR_ARG_CNT);
154 /* setup the float register table */
156 rd->argfltregs = DMNEW(s4, FLT_ARG_CNT);
157 rd->tmpfltregs = DMNEW(s4, FLT_TMP_CNT);
158 rd->savfltregs = DMNEW(s4, FLT_SAV_CNT);
159 rd->freeargfltregs = DMNEW(s4, FLT_ARG_CNT);
160 rd->freetmpfltregs = DMNEW(s4, FLT_TMP_CNT);
161 rd->freesavfltregs = DMNEW(s4, FLT_SAV_CNT);
163 rd->argfltreguse = 0;
164 rd->tmpfltreguse = 0;
165 rd->savfltreguse = 0;
167 for (i = 0; i < FLT_REG_CNT; i++) {
168 switch (nregdescfloat[i]) {
173 rd->savfltregs[rd->savfltreguse++] = i;
176 rd->tmpfltregs[rd->tmpfltreguse++] = i;
179 rd->argfltregs[rd->argfltreguse++] = i;
183 assert(rd->savfltreguse == FLT_SAV_CNT);
184 assert(rd->tmpfltreguse == FLT_TMP_CNT);
185 assert(rd->argfltreguse == FLT_ARG_CNT);
188 rd->freemem = DMNEW(s4, id->cummaxstack);
189 #if defined(HAS_4BYTE_STACKSLOT)
190 rd->freemem_2 = DMNEW(s4, id->cummaxstack);
192 rd->locals = DMNEW(varinfo5, id->cumlocals);
193 rd->interfaces = DMNEW(varinfo5, id->cummaxstack);
194 for (v = rd->locals, i = id->cumlocals; i > 0; v++, i--) {
195 v[0][TYPE_INT].type = -1;
196 v[0][TYPE_LNG].type = -1;
197 v[0][TYPE_FLT].type = -1;
198 v[0][TYPE_DBL].type = -1;
199 v[0][TYPE_ADR].type = -1;
202 for (v = rd->interfaces, i = id->cummaxstack; i > 0; v++, i--) {
203 v[0][TYPE_INT].type = -1;
204 v[0][TYPE_INT].flags = 0;
205 v[0][TYPE_LNG].type = -1;
206 v[0][TYPE_LNG].flags = 0;
207 v[0][TYPE_FLT].type = -1;
208 v[0][TYPE_FLT].flags = 0;
209 v[0][TYPE_DBL].type = -1;
210 v[0][TYPE_DBL].flags = 0;
211 v[0][TYPE_ADR].type = -1;
212 v[0][TYPE_ADR].flags = 0;
215 #if defined(SPECIALMEMUSE)
216 # if defined(__DARWIN__)
217 /* 6*4=24 byte linkage area + 8*4=32 byte minimum parameter Area */
218 rd->memuse = LA_WORD_SIZE + INT_ARG_CNT;
220 rd->memuse = LA_WORD_SIZE;
223 rd->memuse = 0; /* init to zero -> analyse_stack will set it to a higher */
224 /* value, if appropriate */
227 /* Set rd->argxxxreguse to XXX_ARG_CNBT to not use unused argument */
228 /* registers as temp registers */
229 #if defined(HAS_ADDRESS_REGISTER_FILE)
230 rd->argadrreguse = 0;
231 #endif /* defined(HAS_ADDRESS_REGISTER_FILE) */
232 rd->argintreguse = 0;
233 rd->argfltreguse = 0;
238 * These are local overrides for various environment variables in Emacs.
239 * Please do not remove this and leave it at the end of the file, where
240 * Emacs will automagically detect them.
241 * ---------------------------------------------------------------------
244 * indent-tabs-mode: t