1 /* src/vm/jit/i386/md-abi.c - functions for i386 Linux 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 Ullrich
29 Changes: Christian Thalinger
31 $Id: md-abi.c 6260 2006-12-28 20:56:09Z twisti $
39 #include "vm/jit/i386/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
43 #include "vm/jit/abi.h"
46 /* register descripton - array ************************************************/
49 REG_RET, REG_RES, REG_RES, REG_TMP, REG_RES, REG_SAV, REG_SAV, REG_SAV,
54 "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi"
59 s4 nregdescfloat[] = {
60 /* rounding problems with callee saved registers */
61 /* REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_RES, REG_RES, */
62 /* REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, */
63 REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
68 /* md_param_alloc **************************************************************
70 Allocate Arguments to Stackslots according the Calling Conventions
73 md->paramcount: Number of arguments for this method
74 md->paramtypes[].type: Argument types
77 md->params[].inmemory: Argument spilled on stack
78 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
79 md->memuse: Stackslots needed for argument spilling
80 md->argintreguse: max number of integer arguments used
81 md->argfltreguse: max number of float arguments used
83 *******************************************************************************/
85 void md_param_alloc(methoddesc *md)
94 for (i = 0; i < md->paramcount; i++, pd++) {
96 pd->regoff = stacksize;
97 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2 : 1;
100 md->memuse = stacksize;
101 md->argintreguse = 0;
102 md->argfltreguse = 0;
106 /* md_return_alloc *************************************************************
108 No straight forward precoloring of the Java Stackelement containing
109 the return value possible for i386, since it uses "reserved"
110 registers for return values
112 *******************************************************************************/
114 void md_return_alloc(jitdata *jd, stackptr stackslot)
121 * These are local overrides for various environment variables in Emacs.
122 * Please do not remove this and leave it at the end of the file, where
123 * Emacs will automagically detect them.
124 * ---------------------------------------------------------------------
127 * indent-tabs-mode: t