Moved ABI and machine dependent stuff into linux/ subdirectory.
[cacao.git] / src / vm / jit / powerpc / linux / md-abi.c
1 /* src/vm/jit/powerpc/linux/md-abi.c - functions for PowerPC Linux ABI
2
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
7
8    This file is part of CACAO.
9
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.
14
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.
19
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
23    02111-1307, USA.
24
25    Contact: cacao@complang.tuwien.ac.at
26
27    Authors: Christian Thalinger
28
29    Changes:
30
31    $Id: md-abi.c 2554 2005-06-06 14:48:21Z twisti $
32
33 */
34
35
36 #include "vm/jit/powerpc/types.h"
37 #include "vm/jit/powerpc/linux/md-abi.h"
38
39 #include "vm/descriptor.h"
40 #include "vm/global.h"
41
42
43 #define _ALIGN(a)    do { if ((a) & 1) (a)++; } while (0)
44
45
46 /* md_param_alloc **************************************************************
47
48    XXX
49
50 *******************************************************************************/
51
52 void md_param_alloc(methoddesc *md)
53 {
54         paramdesc *pd;
55         s4         i;
56         s4         iarg;
57         s4         farg;
58         s4         stacksize;
59
60         /* set default values */
61
62         iarg = 0;
63         farg = 0;
64         stacksize = LA_WORD_SIZE;
65
66         /* get params field of methoddesc */
67
68         pd = md->params;
69
70         for (i = 0; i < md->paramcount; i++, pd++) {
71                 switch (md->paramtypes[i].type) {
72                 case TYPE_INT:
73                 case TYPE_ADR:
74                         if (iarg < INT_ARG_CNT) {
75                                 pd->inmemory = false;
76                                 pd->regoff = iarg;
77
78                         } else {
79                                 pd->inmemory = true;
80                                 pd->regoff = stacksize;
81                         }
82                         if (iarg < INT_ARG_CNT)
83                                 iarg++;
84                         else
85                                 stacksize++;
86                         break;
87                 case TYPE_LNG:
88                         if (iarg < INT_ARG_CNT - 1)
89                                 _ALIGN(iarg);
90                         else
91                                 _ALIGN(stacksize);
92                         if (iarg < INT_ARG_CNT - 1) {
93                                 pd->inmemory = false;
94                                 pd->regoff = iarg;
95                         } else {
96                                 pd->inmemory = true;
97                                 pd->regoff = stacksize;
98                         }
99                         if (iarg < INT_ARG_CNT - 1)
100                                 iarg += 2;
101                         else {
102                                 iarg = INT_ARG_CNT;
103                                 stacksize += 2;
104                         }
105                         break;
106                 case TYPE_FLT:
107                 case TYPE_DBL:
108                         if ((farg >= FLT_ARG_CNT) && IS_2_WORD_TYPE(md->paramtypes[i].type))
109                                 _ALIGN(stacksize);
110                         if (farg < FLT_ARG_CNT) {
111                                 pd->inmemory = false;
112                                 pd->regoff = farg;
113                         } else {
114                                 pd->inmemory = true;
115                                 pd->regoff = stacksize;
116                         }
117                         if (farg < FLT_ARG_CNT)
118                                 farg++;
119                         else
120                                 if (IS_2_WORD_TYPE(md->paramtypes[i].type))
121                                         stacksize += 2;
122                                 else
123                                         stacksize++;
124                         break;
125                 }
126         }
127
128         /* fill register and stack usage */
129
130         md->argintreguse = iarg;
131         md->argfltreguse = farg;
132         md->memuse = stacksize;
133 }
134
135
136 /*
137  * These are local overrides for various environment variables in Emacs.
138  * Please do not remove this and leave it at the end of the file, where
139  * Emacs will automagically detect them.
140  * ---------------------------------------------------------------------
141  * Local variables:
142  * mode: c
143  * indent-tabs-mode: t
144  * c-basic-offset: 4
145  * tab-width: 4
146  * End:
147  */