1 /* src/vm/jit/powerpc64/linux/md-abi.c - functions for PowerPC64 Linux ABI
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
32 #include "vm/jit/powerpc64/linux/md-abi.h"
34 #include "vm/descriptor.h"
35 #include "vm/global.h"
37 #include "vm/jit/abi.h"
38 #include "vm/jit/stack.h"
41 /* register descripton array **************************************************/
44 /* zero, sp, TOC, a0/v0, a1/v1, a2, a3, a4, */
45 REG_RES, REG_RES, REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
47 /* a5, a6, a7, itmp1, itmp2, NO(SYS), pv, s0, */
48 REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, REG_RES, REG_SAV,
50 /*itmp3, t0, t1, t2, t3, t4, t5, t6, */
51 REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
53 /* s1, s2, s3, s4, s5, s6, s7, s8, */
54 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
59 const char *abi_registers_integer_name[] = {
60 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
61 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
62 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
63 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
66 const s4 abi_registers_integer_argument[] = {
77 const s4 abi_registers_integer_saved[] = {
89 const s4 abi_registers_integer_temporary[] = {
100 s4 nregdescfloat[] = {
101 /*ftmp3, fa0/v0, fa1, fa2, fa3, fa4, fa5, fa6, */
102 REG_RES, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
104 /* fa7, fa8, fa9, fa10, fa11, fa12, ftmp1, ftmp2, */
105 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES,
107 /* fs0, fs1, fs2, fs3, fs4, fs5, fs6, fs7 */
108 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
110 /* fs8, fs9, fs10, fs11, fs12, fs13, fs14, fs15 */
111 REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
116 const s4 abi_registers_float_argument[] = {
132 const s4 abi_registers_float_saved[] = {
151 const s4 abi_registers_float_temporary[] = {
156 /* md_param_alloc **************************************************************
158 Allocate Arguments to Stackslots according the Calling Conventions
161 md->paramcount: Number of arguments for this method
162 md->paramtypes[].type: Argument types
165 md->params[].inmemory: Argument spilled on stack
166 md->params[].regoff: Stack offset or rd->arg[int|flt]regs index
167 md->memuse: Stackslots needed for argument spilling
168 md->argintreguse: max number of integer arguments used
169 md->argfltreguse: max number of float arguments used
171 *******************************************************************************/
173 void md_param_alloc(methoddesc *md)
180 s4 stacksize, stackcount;
183 /* set default values */
188 stacksize = LA_SIZE_IN_POINTERS;
191 /* get params field of methoddesc */
195 for (i = 0; i < md->paramcount; i++, pd++) {
196 switch (md->paramtypes[i].type) {
200 if (iarg < INT_ARG_CNT) {
201 pd->inmemory = false;
203 pd->regoff = abi_registers_integer_argument[iarg];
208 pd->index = stacksize + stackcount;
209 pd->regoff = (stacksize + stackcount) * 8;
214 if (farg < FLT_ARG_CNT) {
215 pd->inmemory = false;
217 pd->regoff = abi_registers_float_argument[farg];
219 if (arg < INT_ARG_CNT) {
220 iarg++; /* yes, that is true, floating arguments take int register slots away */
225 pd->index = stacksize + stackcount;
226 pd->regoff = (stacksize + stackcount) * 8;
236 /* Since R3, F1 (==A0, A0) are used for passing return values, this */
237 /* argument register usage has to be regarded, too */
238 if (IS_INT_LNG_TYPE(md->returntype.type)) {
242 else if (IS_FLT_DBL_TYPE(md->returntype.type)) {
247 /* fill register and stack usage, parameter areas is at least PA_SIZE_IN_POINTERS */
249 md->argintreguse = iarg;
250 md->argfltreguse = farg;
251 md->memuse = stacksize + (stackcount<PA_SIZE_IN_POINTERS? PA_SIZE_IN_POINTERS: stackcount);
255 /* md_param_alloc_native *******************************************************
257 Pre-allocate arguments according the native ABI.
259 *******************************************************************************/
261 void md_param_alloc_native(methoddesc *md)
263 /* On PowerPC64 we use the same ABI for JIT method calls as for
264 native method calls. */
270 /* md_return_alloc *************************************************************
272 Precolor the Java Stackelement containing the Return Value, if
273 possible. (R3==a00 for int/adr, R4/R3 == a01/a00 for long, F1==a00
277 jd: jitdata of the current method
278 stackslot: Java Stackslot to contain the Return Value
281 if precoloring was possible:
282 VAR(stackslot->varnum)->flags = PREALLOC
283 VAR(stackslot->varnum)->vv.regoff = [REG_RESULT, REG_FRESULT]
284 rd->arg[flt|int]reguse set to a value according the register usage
286 *******************************************************************************/
288 void md_return_alloc(jitdata *jd, stackelement_t *stackslot)
295 /* get required compiler data */
303 /* In Leafmethods Local Vars holding parameters are precolored to
304 their argument register -> so leafmethods with paramcount > 0
305 could already use R3 == a00! */
307 if (!code_is_leafmethod(code) || (md->paramcount == 0)) {
308 /* Only precolor the stackslot, if it is not a SAVEDVAR <->
309 has not to survive method invokations. */
311 if (!(stackslot->flags & SAVEDVAR)) {
313 VAR(stackslot->varnum)->flags = PREALLOC;
315 if (IS_INT_LNG_TYPE(md->returntype.type)) {
316 if (rd->argintreguse < 1)
317 rd->argintreguse = 1;
319 VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
320 } else { /* float/double */
321 if (rd->argfltreguse < 1)
322 rd->argfltreguse = 1;
324 VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
332 * These are local overrides for various environment variables in Emacs.
333 * Please do not remove this and leave it at the end of the file, where
334 * Emacs will automagically detect them.
335 * ---------------------------------------------------------------------
338 * indent-tabs-mode: t