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 5070 2006-07-03 13:46:42Z twisti $
39 #include "vm/jit/alpha/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
45 /* register descripton array **************************************************/
48 /* v0, t0, t1, t2, t3, t4, t5, t6, */
49 REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
51 /* t7, s0, s1, s2, s3, s4, s5, s6, */
52 REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
54 /* a0, a1, a2, a3, a4, a5, t8, t9, */
55 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
57 /* t10, itmp1, ra, pv, at, itmp3, sp, zero, */
58 REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
63 s4 nregdescfloat[] = {
64 REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
65 REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
66 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
67 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
72 /* md_param_alloc **************************************************************
74 Allocate the parameters of the given method descriptor according to the
75 calling convention of the platform.
77 *******************************************************************************/
79 void md_param_alloc(methoddesc *md)
86 /* set default values */
91 /* get params field of methoddesc */
95 for (i = 0; i < md->paramcount; i++, pd++) {
96 switch (md->paramtypes[i].type) {
100 if (i < INT_ARG_CNT) {
101 pd->inmemory = false;
104 md->argintreguse = reguse;
108 pd->regoff = stacksize;
114 if (i < FLT_ARG_CNT) {
115 pd->inmemory = false;
118 md->argfltreguse = reguse;
121 pd->regoff = stacksize;
128 /* fill register and stack usage */
130 md->memuse = stacksize;
134 /* md_return_alloc *************************************************************
136 Precolor the Java Stackelement containing the Return Value. Since
137 alpha has a dedicated return register (not an reused arg or
138 reserved reg), this is striaghtforward possible, as long, as this
139 stackelement does not have to survive a method invokation
143 m: Methodinfo of current method
144 return_type: Return Type of the Method (TYPE_INT.. TYPE_ADR)
145 TYPE_VOID is not allowed!
146 stackslot: Java Stackslot to contain the Return Value
149 if precoloring was possible:
150 stackslot->varkind =ARGVAR
153 ->regoff =[REG_RESULT, REG_FRESULT]
155 *******************************************************************************/
157 void md_return_alloc(methodinfo *m, registerdata *rd, s4 return_type,
160 /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has not */
161 /* to survive method invokations */
163 if (!(stackslot->flags & SAVEDVAR)) {
164 stackslot->varkind = ARGVAR;
165 stackslot->varnum = -1;
166 stackslot->flags = 0;
168 if (IS_INT_LNG_TYPE(return_type)) {
169 stackslot->regoff = REG_RESULT;
170 } else { /* float/double */
171 stackslot->regoff = REG_FRESULT;
178 * These are local overrides for various environment variables in Emacs.
179 * Please do not remove this and leave it at the end of the file, where
180 * Emacs will automagically detect them.
181 * ---------------------------------------------------------------------
184 * indent-tabs-mode: t