1 /* src/vm/jit/alpha/md-abi.c - functions for Alpha ABI
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: md-abi.c 7335 2007-02-12 10:43:33Z twisti $
33 #include "vm/jit/alpha/md-abi.h"
35 #include "vm/global.h"
37 #include "vm/jit/abi.h"
39 #include "vmcore/descriptor.h"
42 /* register descripton array **************************************************/
45 /* v0, t0, t1, t2, t3, t4, t5, t6, */
46 REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
48 /* t7, s0, s1, s2, s3, s4, s5, s6, */
49 REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
51 /* a0, a1, a2, a3, a4, a5, t8, t9, */
52 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
54 /* t10, itmp1, ra, pv, at, itmp3, sp, zero, */
55 REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
60 const char *abi_registers_integer_name[] = {
61 "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6",
62 "t7", "s0", "s1", "s2", "s3", "s4", "s5", "s6",
63 "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9",
64 "t10", "t11", "ra", "pv", "at", "gp", "sp", "zero"
68 s4 nregdescfloat[] = {
69 REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
70 REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
71 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
72 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
77 /* md_param_alloc **************************************************************
79 Allocate the parameters of the given method descriptor according to the
80 calling convention of the platform.
82 *******************************************************************************/
84 void md_param_alloc(methoddesc *md)
91 /* set default values */
96 /* get params field of methoddesc */
100 for (i = 0; i < md->paramcount; i++, pd++) {
101 switch (md->paramtypes[i].type) {
105 if (i < INT_ARG_CNT) {
106 pd->inmemory = false;
109 md->argintreguse = reguse;
113 pd->regoff = stacksize;
120 if (i < FLT_ARG_CNT) {
121 pd->inmemory = false;
124 md->argfltreguse = reguse;
128 pd->regoff = stacksize;
135 /* fill register and stack usage */
137 md->memuse = stacksize;
141 /* md_param_alloc_native *******************************************************
143 Pre-allocate arguments according to the native ABI.
145 *******************************************************************************/
147 void md_param_alloc_native(methoddesc *md)
149 /* On Alpha we use the same ABI for JIT method calls as for native
156 /* md_return_alloc *************************************************************
158 Precolor the Java Stackelement containing the Return Value. Since
159 alpha has a dedicated return register (not an reused arg or
160 reserved reg), this is striaghtforward possible, as long, as this
161 stackelement does not have to survive a method invokation
165 jd: jitdata of the current method
166 stackslot: Java Stackslot to contain the Return Value
169 if precoloring was possible:
170 VAR(stackslot->varnum)->flags = PREALLOC
171 ->vv.regoff = [REG_RESULT|REG_FRESULT]
172 rd->arg[flt|int]reguse set to a value according the register usage
174 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
175 *******************************************************************************/
177 void md_return_alloc(jitdata *jd, stackptr stackslot)
182 /* get required compiler data */
188 /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has
189 not to survive method invokations. */
191 if (!(stackslot->flags & SAVEDVAR)) {
193 VAR(stackslot->varnum)->flags = PREALLOC;
195 if (IS_INT_LNG_TYPE(md->returntype.type))
196 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
198 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
204 * These are local overrides for various environment variables in Emacs.
205 * Please do not remove this and leave it at the end of the file, where
206 * Emacs will automagically detect them.
207 * ---------------------------------------------------------------------
210 * indent-tabs-mode: t