1 /* src/vm/jit/i386/md-abi.c - functions for i386 Linux 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 8210 2007-07-18 12:51:00Z twisti $
33 #include "vm/jit/i386/md-abi.h"
35 #include "vm/global.h"
37 #include "vm/jit/abi.h"
39 #include "vmcore/descriptor.h"
42 /* register descripton - array ************************************************/
45 REG_RET, REG_RES, REG_RES, REG_TMP, REG_RES, REG_SAV, REG_SAV, REG_SAV,
49 const char *abi_registers_integer_name[] = {
50 "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi"
53 const s4 abi_registers_integer_argument[] = {
57 const s4 abi_registers_integer_saved[] = {
63 const s4 abi_registers_integer_temporary[] = {
68 s4 nregdescfloat[] = {
69 /* rounding problems with callee saved registers */
70 /* REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_RES, REG_RES, */
71 /* REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, */
72 REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
76 const s4 abi_registers_float_argument[] = {
80 const s4 abi_registers_float_saved[] = {
84 const s4 abi_registers_float_temporary[] = {
89 /* md_param_alloc **************************************************************
91 Allocate Arguments to Stackslots according the Calling Conventions
94 md->paramcount: Number of arguments for this method
95 md->paramtypes[].type: Argument types
98 md->params[].inmemory: Argument spilled on stack
99 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
100 md->memuse: Stackslots needed for argument spilling
101 md->argintreguse: max number of integer arguments used
102 md->argfltreguse: max number of float arguments used
104 *******************************************************************************/
106 void md_param_alloc(methoddesc *md)
115 for (i = 0; i < md->paramcount; i++, pd++) {
117 pd->index = stacksize;
118 pd->regoff = stacksize * 8;
122 md->memuse = stacksize;
123 md->argintreguse = 0;
124 md->argfltreguse = 0;
128 /* md_param_alloc_native *******************************************************
130 Pre-allocate arguments according the native ABI.
132 *******************************************************************************/
134 void md_param_alloc_native(methoddesc *md)
143 for (i = 0; i < md->paramcount; i++, pd++) {
145 pd->index = stacksize;
146 pd->regoff = stacksize * 4;
147 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2 : 1;
150 md->memuse = stacksize;
151 md->argintreguse = 0;
152 md->argfltreguse = 0;
156 /* md_return_alloc *************************************************************
158 No straight forward precoloring of the Java Stackelement containing
159 the return value possible for i386, since it uses "reserved"
160 registers for return values
162 *******************************************************************************/
164 void md_return_alloc(jitdata *jd, stackptr stackslot)
171 * These are local overrides for various environment variables in Emacs.
172 * Please do not remove this and leave it at the end of the file, where
173 * Emacs will automagically detect them.
174 * ---------------------------------------------------------------------
177 * indent-tabs-mode: t