1 /* src/vm/jit/powerpc/linux/md-abi.c - functions for PowerPC 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 Thalinger
29 Changes: Christian Ullrich
31 $Id: md-abi.c 2813 2005-06-23 14:30:44Z christian $
36 #include "vm/jit/powerpc/types.h"
37 #include "vm/jit/powerpc/linux/md-abi.h"
39 #include "vm/descriptor.h"
40 #include "vm/global.h"
43 #define _ALIGN(a) do { if ((a) & 1) (a)++; } while (0)
46 /* md_param_alloc **************************************************************
48 Allocate Arguments to Stackslots according the Calling Conventions
51 md->paramcount: Number of arguments for this method
52 md->paramtypes[].type: Argument types
55 md->params[].inmemory: Argument spilled on stack
56 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
57 md->memuse: Stackslots needed for argument spilling
58 md->argintreguse: max number of integer arguments used
59 md->argfltreguse: max number of float arguments used
61 *******************************************************************************/
63 void md_param_alloc(methoddesc *md)
71 /* set default values */
75 stacksize = LA_WORD_SIZE;
77 /* get params field of methoddesc */
81 for (i = 0; i < md->paramcount; i++, pd++) {
82 switch (md->paramtypes[i].type) {
85 if (iarg < INT_ARG_CNT) {
91 pd->regoff = stacksize;
93 if (iarg < INT_ARG_CNT)
99 if (iarg < INT_ARG_CNT - 1)
103 if (iarg < INT_ARG_CNT - 1) {
104 pd->inmemory = false;
105 /* rd->arg[int|flt]regs index !! */
106 pd->regoff = PACK_REGS(iarg + 1, iarg);
109 pd->regoff = stacksize;
111 if (iarg < INT_ARG_CNT - 1)
120 if ((farg >= FLT_ARG_CNT) && IS_2_WORD_TYPE(md->paramtypes[i].type))
122 if (farg < FLT_ARG_CNT) {
123 pd->inmemory = false;
127 pd->regoff = stacksize;
129 if (farg < FLT_ARG_CNT)
132 if (IS_2_WORD_TYPE(md->paramtypes[i].type))
140 /* fill register and stack usage */
142 md->argintreguse = iarg;
143 md->argfltreguse = farg;
144 md->memuse = stacksize;
149 * These are local overrides for various environment variables in Emacs.
150 * Please do not remove this and leave it at the end of the file, where
151 * Emacs will automagically detect them.
152 * ---------------------------------------------------------------------
155 * indent-tabs-mode: t