1 /* src/vm/jit/i386/md-abi.c - functions for i386 Linux 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 Ullrich
29 Changes: Christian Thalinger
31 $Id: md-abi.c 4064 2006-01-02 14:24:50Z twisti $
39 #include "vm/jit/i386/md-abi.h"
41 #include "vm/descriptor.h"
42 #include "vm/global.h"
45 /* register descripton - array ************************************************/
48 REG_RET, REG_RES, REG_RES, REG_TMP, REG_RES, REG_SAV, REG_SAV, REG_SAV,
53 s4 nregdescfloat[] = {
54 /* rounding problems with callee saved registers */
55 /* REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_RES, REG_RES, */
56 /* REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, */
57 REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
62 /* md_param_alloc **************************************************************
64 Allocate Arguments to Stackslots according the Calling Conventions
67 md->paramcount: Number of arguments for this method
68 md->paramtypes[].type: Argument types
71 md->params[].inmemory: Argument spilled on stack
72 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
73 md->memuse: Stackslots needed for argument spilling
74 md->argintreguse: max number of integer arguments used
75 md->argfltreguse: max number of float arguments used
77 *******************************************************************************/
79 void md_param_alloc(methoddesc *md)
88 for (i = 0; i < md->paramcount; i++, pd++) {
90 pd->regoff = stacksize;
91 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2 : 1;
94 md->memuse = stacksize;
100 /* md_return_alloc *************************************************************
102 No straight forward precoloring of the Java Stackelement containing
103 the return value possible for i386, since it uses "reserved"
104 registers for return values
106 *******************************************************************************/
108 void md_return_alloc(methodinfo *m, registerdata *rd, s4 return_type,
116 * These are local overrides for various environment variables in Emacs.
117 * Please do not remove this and leave it at the end of the file, where
118 * Emacs will automagically detect them.
119 * ---------------------------------------------------------------------
122 * indent-tabs-mode: t