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 */
55 s4 nregdescadr[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_RES, REG_RES, REG_END };
57 s4 nregdescadr[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_RES, REG_END };
60 const char *abi_registers_address_name [] = { "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7" };
62 const s4 abi_registers_address_argument[] ;
64 const s4 abi_registers_address_saved[] = {5};
66 const s4 abi_registers_address_saved[] = {5,6};
68 const s4 abi_registers_address_temporary[] = {0,1};
71 /* Floatingpoint register description */
72 /* F0, F1, FTMP1, FTMP2, FTMP3, F5, F6, F7 */
73 #if !defined(ENABLE_SOFTFLOAT)
74 s4 nregdescfloat[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_END };
76 s4 nregdescfloat[] = { REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_END };
79 const char *abi_registers_float_name [] = { "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7" };
81 const s4 abi_registers_float_argument[] ;
82 const s4 abi_registers_float_saved[] = {5,6,7};
83 const s4 abi_registers_float_temporary[] = {0,1};
86 /* md_param_alloc_native *******************************************************
88 * Pre-allocate arguments according the native ABI.
90 * *******************************************************************************/
92 void md_param_alloc_native(methoddesc *md)
94 /* For now use system ABI */
99 /* md_param_alloc **************************************************************
101 * Allocate Arguments to Stackslots according the Calling Conventions
104 * md->paramcount: Number of arguments for this method
105 * md->paramtypes[].type: Argument types
108 * md->params[].inmemory: Argument spilled on stack
109 * md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
110 * md->memuse: Stackslots needed for argument spilling
111 * md->argintreguse: max number of integer arguments used
112 * md->argfltreguse: max number of float arguments used
114 ********************************************************************************/
115 void md_param_alloc(methoddesc *md)
124 for (i=0; i<md->paramcount; i++, pd++) {
126 pd->regoff = stacksize * 4;
127 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2:1;
130 md->memuse = stacksize;
131 md->argintreguse = 0;
132 md->argfltreguse = 0;
133 md->argadrreguse = 0;
136 /* md_return_alloc *************************************************************
138 Precolor the Java Stackelement containing the Return Value, if
139 possible. We stick to the abi as closed as possible and therefore use
140 %d0 for all word types %d0-%d1 for 2 word types. %f0-%f1 for floats/doubles
141 *******************************************************************************/
143 void md_return_alloc(jitdata *jd, stackptr stackslot)
146 /* The Problem: %a0, %a1, %d0 and %d1 are scratch registers by platform abi
147 * so they are defined REG_TMP, which i think is correct. But a preallocated
148 * register has to be REG_SAV it seems. One could make theese REG_SAV but
149 * then there would be a abi mismatch with native functions...for now no
157 /* get required compiler data */
164 /* XXX wondering if this is correct */
165 assert(rd->argintreguse == 0);
166 assert(rd->argadrreguse == 0);
167 assert(rd->argfltreguse == 0);
169 VAR(stackslot->varnum)->flags = PREALLOC;
170 switch (md->returntype.type) {
173 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
176 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
181 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
191 * These are local overrides for various environment variables in Emacs.
192 * Please do not remove this and leave it at the end of the file, where
193 * Emacs will automagically detect them.
194 * ---------------------------------------------------------------------
197 * indent-tabs-mode: t
201 * vim:noexpandtab:sw=4:ts=4: