1 /* src/vm/jit/alpha/md-abi.c - functions for Alpha ABI
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 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., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Christian Thalinger
29 Changes: Christian Ullrich
31 $Id: md-abi.c 2871 2005-06-29 12:40:42Z christian $
36 #include "vm/jit/alpha/types.h"
37 #include "vm/jit/alpha/md-abi.h"
39 #include "vm/descriptor.h"
40 #include "vm/global.h"
43 /* md_param_alloc **************************************************************
47 *******************************************************************************/
49 void md_param_alloc(methoddesc *md)
56 /* set default values */
61 /* get params field of methoddesc */
65 for (i = 0; i < md->paramcount; i++, pd++) {
66 switch (md->paramtypes[i].type) {
70 if (i < INT_ARG_CNT) {
74 md->argintreguse = reguse;
78 pd->regoff = stacksize;
84 if (i < FLT_ARG_CNT) {
88 md->argfltreguse = reguse;
91 pd->regoff = stacksize;
98 /* fill register and stack usage */
100 md->memuse = stacksize;
103 /* md_return_alloc *************************************************************
105 Precolor the Java Stackelement containing the Return Value. Since alpha
106 has a dedicated return register (not an reused arg or reserved reg), this
107 is striaghtforward possible, as long, as this stackelement does not have to
108 survive a method invokation (SAVEDVAR)
111 m: Methodinfo of current method
112 return_type: Return Type of the Method (TYPE_INT.. TYPE_ADR)
113 TYPE_VOID is not allowed!
114 stackslot: Java Stackslot to contain the Return Value
117 if precoloring was possible:
118 stackslot->varkind =ARGVAR
121 ->regoff =[REG_RESULT, REG_FRESULT]
124 *******************************************************************************/
125 void md_return_alloc(methodinfo *m, registerdata *rd, s4 return_type,
126 stackptr stackslot) {
127 /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has not */
128 /* to survive method invokations */
129 if (!(stackslot->flags & SAVEDVAR)) {
130 stackslot->varkind = ARGVAR;
131 stackslot->varnum = -1;
132 stackslot->flags = 0;
133 if ( IS_INT_LNG_TYPE(return_type) ) {
134 stackslot->regoff = REG_RESULT;
135 } else { /* float/double */
136 stackslot->regoff = REG_FRESULT;
142 * These are local overrides for various environment variables in Emacs.
143 * Please do not remove this and leave it at the end of the file, where
144 * Emacs will automagically detect them.
145 * ---------------------------------------------------------------------
148 * indent-tabs-mode: t