1 /* src/vm/jit/alpha/md-abi.c - functions for Alpha 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 8198 2007-07-12 07:16:24Z twisti $
33 #include "vm/jit/alpha/md-abi.h"
35 #include "vm/global.h"
37 #include "vm/jit/abi.h"
39 #include "vmcore/descriptor.h"
42 /* register descripton array **************************************************/
45 /* v0, t0, t1, t2, t3, t4, t5, t6, */
46 REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
48 /* t7, s0, s1, s2, s3, s4, s5, s6, */
49 REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
51 /* a0, a1, a2, a3, a4, a5, t8, t9, */
52 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
54 /* t10, itmp1, ra, pv, at, itmp3, sp, zero, */
55 REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
60 const char *abi_registers_integer_name[] = {
61 "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6",
62 "t7", "s0", "s1", "s2", "s3", "s4", "s5", "s6",
63 "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9",
64 "t10", "t11", "ra", "pv", "at", "gp", "sp", "zero"
67 const s4 abi_registers_integer_argument[] = {
76 const s4 abi_registers_integer_saved[] = {
86 const s4 abi_registers_integer_temporary[] = {
101 s4 nregdescfloat[] = {
102 REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
103 REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
104 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
105 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
110 const s4 abi_registers_float_argument[] = {
119 const s4 abi_registers_float_saved[] = {
130 const s4 abi_registers_float_temporary[] = {
147 /* md_param_alloc **************************************************************
149 Allocate the parameters of the given method descriptor according to the
150 calling convention of the platform.
152 *******************************************************************************/
154 void md_param_alloc(methoddesc *md)
161 /* set default values */
166 /* get params field of methoddesc */
170 for (i = 0; i < md->paramcount; i++, pd++) {
171 switch (md->paramtypes[i].type) {
175 if (i < INT_ARG_CNT) {
176 pd->inmemory = false;
178 pd->regoff = abi_registers_integer_argument[reguse];
180 md->argintreguse = reguse;
184 pd->index = stacksize;
185 pd->regoff = stacksize * 8;
192 if (i < FLT_ARG_CNT) {
193 pd->inmemory = false;
195 pd->regoff = abi_registers_float_argument[reguse];
197 md->argfltreguse = reguse;
201 pd->index = stacksize;
202 pd->regoff = stacksize * 8;
209 /* fill register and stack usage */
211 md->memuse = stacksize;
215 /* md_param_alloc_native *******************************************************
217 Pre-allocate arguments according to the native ABI.
219 *******************************************************************************/
221 void md_param_alloc_native(methoddesc *md)
223 /* On Alpha we use the same ABI for JIT method calls as for native
230 /* md_return_alloc *************************************************************
232 Precolor the Java Stackelement containing the Return Value. Since
233 alpha has a dedicated return register (not an reused arg or
234 reserved reg), this is striaghtforward possible, as long, as this
235 stackelement does not have to survive a method invokation
239 jd: jitdata of the current method
240 stackslot: Java Stackslot to contain the Return Value
243 if precoloring was possible:
244 VAR(stackslot->varnum)->flags = PREALLOC
245 ->vv.regoff = [REG_RESULT|REG_FRESULT]
246 rd->arg[flt|int]reguse set to a value according the register usage
248 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
249 *******************************************************************************/
251 void md_return_alloc(jitdata *jd, stackptr stackslot)
256 /* get required compiler data */
262 /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has
263 not to survive method invokations. */
265 if (!(stackslot->flags & SAVEDVAR)) {
267 VAR(stackslot->varnum)->flags = PREALLOC;
269 if (IS_INT_LNG_TYPE(md->returntype.type))
270 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
272 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
278 * These are local overrides for various environment variables in Emacs.
279 * Please do not remove this and leave it at the end of the file, where
280 * Emacs will automagically detect them.
281 * ---------------------------------------------------------------------
284 * indent-tabs-mode: t