1 /* src/vm/jit/m68k/linux/md-abi.c - linux specific abi functions
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
35 #include "vm/jit/abi.h"
37 /* Integer register description */
38 /* D0, D1, ITMP1, ITMP2, ITMP3, D5, D6, D7 */
39 s4 nregdescint[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_END };
41 const char *abi_registers_integer_name [] = { "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7" };
43 const s4 abi_registers_integer_argument[] ;
44 const s4 abi_registers_integer_saved[] = {5,6,7};
45 const s4 abi_registers_integer_temporary[] = {0,1};
47 /* Address register description */
48 /* A6 is used as framepointer by native code, so be sure it is REG_RES */
49 /* A0, A1, ATMP1, ATMP2, ATMP3, A5, REG_FP, REG_SP */
51 s4 nregdescadr[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_RES, REG_RES, REG_END };
53 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[] ;
60 const s4 abi_registers_address_saved[] = {5};
62 const s4 abi_registers_address_saved[] = {5,6};
64 const s4 abi_registers_address_temporary[] = {0,1};
67 /* Floatingpoint register description */
68 /* F0, F1, FTMP1, FTMP2, FTMP3, F5, F6, F7 */
69 #if !defined(ENABLE_SOFTFLOAT)
70 s4 nregdescfloat[] = { REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_END };
72 s4 nregdescfloat[] = { REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_END };
75 const char *abi_registers_float_name [] = { "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7" };
77 const s4 abi_registers_float_argument[] ;
78 const s4 abi_registers_float_saved[] = {5,6,7};
79 const s4 abi_registers_float_temporary[] = {0,1};
82 /* md_param_alloc_native *******************************************************
84 * Pre-allocate arguments according the native ABI.
86 * *******************************************************************************/
88 void md_param_alloc_native(methoddesc *md)
97 for (i=0; i<md->paramcount; i++, pd++) {
99 pd->regoff = stacksize * 4;
100 pd->index = stacksize;
101 stacksize += IS_2_WORD_TYPE(md->paramtypes[i].type) ? 2:1;
104 md->memuse = stacksize;
105 md->argintreguse = 0;
106 md->argfltreguse = 0;
107 md->argadrreguse = 0;
112 /* md_param_alloc **************************************************************
114 * Allocate Arguments to Stackslots according the Calling Conventions
117 * md->paramcount: Number of arguments for this method
118 * md->paramtypes[].type: Argument types
121 * md->params[].inmemory: Argument spilled on stack
122 * md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
123 * md->memuse: Stackslots needed for argument spilling
124 * md->argintreguse: max number of integer arguments used
125 * md->argfltreguse: max number of float arguments used
127 ********************************************************************************/
128 void md_param_alloc(methoddesc *md)
137 for (i=0; i<md->paramcount; i++, pd++) {
139 pd->regoff = stacksize * 8;
140 pd->index = stacksize;
144 md->memuse = stacksize;
145 md->argintreguse = 0;
146 md->argfltreguse = 0;
147 md->argadrreguse = 0;
150 /* md_return_alloc *************************************************************
152 Precolor the Java Stackelement containing the Return Value, if
153 possible. We stick to the abi as closed as possible and therefore use
154 %d0 for all word types %d0-%d1 for 2 word types. %f0-%f1 for floats/doubles
155 *******************************************************************************/
157 void md_return_alloc(jitdata *jd, stackelement_t *stackslot)
160 /* The Problem: %a0, %a1, %d0 and %d1 are scratch registers by platform abi
161 * so they are defined REG_TMP, which i think is correct. But a preallocated
162 * register has to be REG_SAV it seems. One could make theese REG_SAV but
163 * then there would be a abi mismatch with native functions...for now no
171 /* get required compiler data */
178 /* XXX wondering if this is correct */
179 assert(rd->argintreguse == 0);
180 assert(rd->argadrreguse == 0);
181 assert(rd->argfltreguse == 0);
183 VAR(stackslot->varnum)->flags = PREALLOC;
184 switch (md->returntype.type) {
187 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
190 VAR(stackslot->varnum)->vv.regoff = REG_RESULT_PACKED;
195 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
205 * These are local overrides for various environment variables in Emacs.
206 * Please do not remove this and leave it at the end of the file, where
207 * Emacs will automagically detect them.
208 * ---------------------------------------------------------------------
211 * indent-tabs-mode: t
215 * vim:noexpandtab:sw=4:ts=4: