1 /* src/vm/jit/x86_64/md-abi.c - functions for x86_64 Linux 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 7630 2007-04-02 19:56:14Z twisti $
33 #include "vm/jit/x86_64/md-abi.h"
35 #include "vm/global.h"
37 #include "vm/jit/jit.h" /* for REG_* (maybe can be removed) */
39 #include "vmcore/descriptor.h"
42 /* register descripton array **************************************************/
45 REG_RET, REG_ARG, REG_ARG, REG_TMP, REG_RES, REG_SAV, REG_ARG, REG_ARG,
46 REG_ARG, REG_ARG, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
50 const char *abi_registers_integer_name[] = {
51 "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
52 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
55 const s4 abi_registers_integer_argument[] = {
64 const s4 abi_registers_integer_saved[] = {
72 const s4 abi_registers_integer_temporary[] = {
77 s4 nregdescfloat[] = {
78 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
79 REG_RES, REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
84 /* md_param_alloc **************************************************************
88 *******************************************************************************/
90 void md_param_alloc(methoddesc *md)
98 /* set default values */
104 /* get params field of methoddesc */
108 for (i = 0; i < md->paramcount; i++, pd++) {
109 switch (md->paramtypes[i].type) {
113 if (iarg < INT_ARG_CNT) {
114 pd->inmemory = false;
120 pd->regoff = stacksize;
127 if (farg < FLT_ARG_CNT) {
128 pd->inmemory = false;
134 pd->regoff = stacksize;
141 /* Since XMM0 (==A0) is used for passing return values, this
142 argument register usage has to be regarded, too. */
144 if (IS_FLT_DBL_TYPE(md->returntype.type))
148 /* fill register and stack usage */
150 md->argintreguse = iarg;
151 md->argfltreguse = farg;
152 md->memuse = stacksize;
156 /* md_param_alloc_native *******************************************************
158 Pre-allocate arguments according the native ABI.
160 *******************************************************************************/
162 void md_param_alloc_native(methoddesc *md)
164 /* On x86_64 we use the same ABI for JIT method calls as for
165 native method calls. */
171 /* md_return_alloc *************************************************************
173 Precolor the Java Stackelement containing the Return Value. Only
174 for float/ double types straight forward possible, since INT_LNG
175 types use "reserved" registers Float/Double values use a00 as
179 jd: jitdata of the current method
180 stackslot: Java Stackslot to contain the Return Value
183 if precoloring was possible:
184 VAR(stackslot->varnum)->flags = PREALLOC
185 ->vv.regoff = [REG_RESULT|REG_FRESULT]
186 rd->arg[flt|int]reguse set to a value according the register usage
188 NOTE: Do not pass a LOCALVAR in stackslot->varnum.
190 *******************************************************************************/
192 void md_return_alloc(jitdata *jd, stackptr stackslot)
198 /* get required compiler data */
205 /* precoloring only straightforward possible with flt/dbl types
206 For Address/Integer/Long REG_RESULT == rax == REG_ITMP1 and so
207 could be destroyed if the return value Stack Slot "lives too
210 if (IS_FLT_DBL_TYPE(md->returntype.type)) {
211 /* In Leafmethods Local Vars holding parameters are precolored
212 to their argument register -> so leafmethods with
213 paramcount > 0 could already use a00! */
215 if (!jd->isleafmethod || (md->paramcount == 0)) {
216 /* Only precolor the stackslot, if it is not a SAVEDVAR
217 <-> has not to survive method invokations */
219 if (!(stackslot->flags & SAVEDVAR)) {
221 VAR(stackslot->varnum)->flags = PREALLOC;
224 if (rd->argfltreguse < 1)
225 rd->argfltreguse = 1;
227 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
235 * These are local overrides for various environment variables in Emacs.
236 * Please do not remove this and leave it at the end of the file, where
237 * Emacs will automagically detect them.
238 * ---------------------------------------------------------------------
241 * indent-tabs-mode: t