1 /* src/vm/jit/alpha/md-abi.c - functions for Alpha 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
27 Authors: Christian Thalinger
29 Changes: Christian Ullrich
31 $Id: md-abi.c 5595 2006-09-30 23:06:36Z edwin $
39 #include "vm/jit/alpha/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
43 #include "vm/jit/abi.h"
46 /* register descripton array **************************************************/
49 /* v0, t0, t1, t2, t3, t4, t5, t6, */
50 REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
52 /* t7, s0, s1, s2, s3, s4, s5, s6, */
53 REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
55 /* a0, a1, a2, a3, a4, a5, t8, t9, */
56 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
58 /* t10, itmp1, ra, pv, at, itmp3, sp, zero, */
59 REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
64 s4 nregdescfloat[] = {
65 REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
66 REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
67 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
68 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
73 /* md_param_alloc **************************************************************
75 Allocate the parameters of the given method descriptor according to the
76 calling convention of the platform.
78 *******************************************************************************/
80 void md_param_alloc(methoddesc *md)
87 /* set default values */
92 /* get params field of methoddesc */
96 for (i = 0; i < md->paramcount; i++, pd++) {
97 switch (md->paramtypes[i].type) {
101 if (i < INT_ARG_CNT) {
102 pd->inmemory = false;
105 md->argintreguse = reguse;
109 pd->regoff = stacksize;
116 if (i < FLT_ARG_CNT) {
117 pd->inmemory = false;
120 md->argfltreguse = reguse;
124 pd->regoff = stacksize;
131 /* fill register and stack usage */
133 md->memuse = stacksize;
137 /* md_return_alloc *************************************************************
139 Precolor the Java Stackelement containing the Return Value. Since
140 alpha has a dedicated return register (not an reused arg or
141 reserved reg), this is striaghtforward possible, as long, as this
142 stackelement does not have to survive a method invokation
146 m: Methodinfo of current method
147 return_type: Return Type of the Method (TYPE_INT.. TYPE_ADR)
148 TYPE_VOID is not allowed!
149 stackslot: Java Stackslot to contain the Return Value
152 if precoloring was possible:
153 jd->var[stackslot->varnum]->flags = PREALLOC
154 ->regoff =[REG_RESULT|REG_FRESULT]
155 rd->arg[flt|int]reguse set to a value according the register usage
157 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
158 *******************************************************************************/
160 void md_return_alloc(jitdata *jd, stackptr stackslot)
165 /* get required compiler data */
173 /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has
174 not to survive method invokations. */
176 if (!(stackslot->flags & SAVEDVAR)) {
177 /* stackslot->varkind = ARGVAR; */
178 /* stackslot->varnum = -1; */
179 /* stackslot->flags = 0; */
181 VAR(stackslot->varnum)->flags = PREALLOC;
183 if (IS_INT_LNG_TYPE(md->returntype.type))
184 /* stackslot->regoff = REG_RESULT; */
185 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
187 /* stackslot->regoff = REG_FRESULT; */
188 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
194 * These are local overrides for various environment variables in Emacs.
195 * Please do not remove this and leave it at the end of the file, where
196 * Emacs will automagically detect them.
197 * ---------------------------------------------------------------------
200 * indent-tabs-mode: t