1 /* src/vm/jit/m68k/linux/md-abi.c - linux specific abi functions
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: arch.h 5330 2006-09-05 18:43:12Z edwin $
39 #include "vm/jit/abi.h"
41 /* Integer register description */
42 /* D0, D1, ITMP1, ITMP2, ITMP3, D5, D6, D7 */
43 s4 nregdescint[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_END };
45 const char *abi_registers_integer_name [] = { "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7" };
47 const s4 abi_registers_integer_argument[] ;
48 const s4 abi_registers_integer_saved[] = {5,6,7};
49 const s4 abi_registers_integer_temporary[] = {0,1};
51 /* Address register description */
52 /* A6 is used as framepointer by native code, so be sure it is REG_RES */
53 /* A0, A1, ATMP1, ATMP2, ATMP3, A5, REG_FP, REG_SP */
54 s4 nregdescadr[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_RES, REG_END };
56 const char *abi_registers_address_name [] = { "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7" };
58 const s4 abi_registers_address_argument[] ;
59 const s4 abi_registers_address_saved[] = {5,6};
60 const s4 abi_registers_address_temporary[] = {0,1};
63 /* Floatingpoint register description */
64 /* F0, F1, FTMP1, FTMP2, FTMP3, F5, F6, F7 */
65 #if !defined(ENABLE_SOFTFLOAT)
66 s4 nregdescfloat[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_END };
68 s4 nregdescfloat[] = { REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_END };
71 const char *abi_registers_float_name [] = { "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7" };
73 const s4 abi_registers_float_argument[] ;
74 const s4 abi_registers_float_saved[] = {5,6,7};
75 const s4 abi_registers_float_temporary[] = {0,1};
78 /* md_param_alloc_native *******************************************************
80 * Pre-allocate arguments according the native ABI.
82 * *******************************************************************************/
84 void md_param_alloc_native(methoddesc *md)
86 /* For now use system ABI */
91 /* md_param_alloc **************************************************************
93 * Allocate Arguments to Stackslots according the Calling Conventions
96 * md->paramcount: Number of arguments for this method
97 * md->paramtypes[].type: Argument types
100 * md->params[].inmemory: Argument spilled on stack
101 * md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
102 * md->memuse: Stackslots needed for argument spilling
103 * md->argintreguse: max number of integer arguments used
104 * md->argfltreguse: max number of float arguments used
106 ********************************************************************************/
107 void md_param_alloc(methoddesc *md)
116 for (i=0; i<md->paramcount; i++, pd++) {
118 pd->regoff = stacksize;
119 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2:1;
122 md->memuse = stacksize;
123 md->argintreguse = 0;
124 md->argfltreguse = 0;
125 md->argadrreguse = 0;
128 /* md_return_alloc *************************************************************
130 Precolor the Java Stackelement containing the Return Value, if
131 possible. We stick to the abi as closed as possible and therefore use
132 %d0 for all word types %d0-%d1 for 2 word types. %f0-%f1 for floats/doubles
133 *******************************************************************************/
135 void md_return_alloc(jitdata *jd, stackptr stackslot)
138 /* The Problem: %a0, %a1, %d0 and %d1 are scratch registers by platform abi
139 * so they are defined REG_TMP, which i think is correct. But a preallocated
140 * register has to be REG_SAV it seems. One could make theese REG_SAV but
141 * then there would be a abi mismatch with native functions...for now no
149 /* get required compiler data */
156 /* XXX wondering if this is correct */
157 assert(rd->argintreguse == 0);
158 assert(rd->argadrreguse == 0);
159 assert(rd->argfltreguse == 0);
161 VAR(stackslot->varnum)->flags = PREALLOC;
162 switch (md->returntype.type) {
165 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
168 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
173 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
183 * These are local overrides for various environment variables in Emacs.
184 * Please do not remove this and leave it at the end of the file, where
185 * Emacs will automagically detect them.
186 * ---------------------------------------------------------------------
189 * indent-tabs-mode: t
193 * vim:noexpandtab:sw=4:ts=4: