Line data Source code
1 : /* src/vm/jit/x86_64/md-abi.cpp - functions for x86_64 Linux ABI
2 :
3 : Copyright (C) 1996-2013
4 : CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
5 :
6 : This file is part of CACAO.
7 :
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.
12 :
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.
17 :
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
21 : 02110-1301, USA.
22 :
23 : */
24 :
25 :
26 : #include "config.h"
27 : #include "vm/types.hpp"
28 :
29 : #include "vm/jit/x86_64/md-abi.hpp"
30 :
31 : #include "vm/descriptor.hpp"
32 : #include "vm/global.hpp"
33 : #include "vm/method.hpp"
34 :
35 : #include "vm/jit/abi.hpp"
36 : #include "vm/jit/code.hpp"
37 : #include "vm/jit/jit.hpp" /* for REG_* (maybe can be removed) */
38 : #include "vm/jit/stack.hpp"
39 :
40 :
41 : /* register descripton array **************************************************/
42 :
43 : s4 nregdescint[] = {
44 : REG_RET, REG_ARG, REG_ARG, REG_TMP, REG_RES, REG_SAV, REG_ARG, REG_ARG,
45 : REG_ARG, REG_ARG, REG_RES, REG_RES, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
46 : REG_END
47 : };
48 :
49 : const char *abi_registers_integer_name[] = {
50 : "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
51 : "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
52 : };
53 :
54 : const s4 abi_registers_integer_argument[] = {
55 : 7, /* a0 */
56 : 6, /* a1 */
57 : 2, /* a2 */
58 : 1, /* a3 */
59 : 8, /* a4 */
60 : 9, /* a5 */
61 : };
62 :
63 : const s4 abi_registers_integer_saved[] = {
64 : 5, /* s0 */
65 : 12, /* s1 */
66 : 13, /* s2 */
67 : 14, /* s3 */
68 : 15, /* s4 */
69 : };
70 :
71 : const s4 abi_registers_integer_temporary[] = {
72 : 3, /* t0 */
73 : };
74 :
75 :
76 : /* float registers *************************************************************
77 :
78 : xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
79 : (fa0) (fa1) (fa2) (fa3) (fa4) (fa5) (fa6) (fa7)
80 :
81 : xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15
82 : (ftmp1) (ftmp2) (ftmp3) (ft0) (ft1) (ft2) (ft3) (ft4)
83 :
84 : *******************************************************************************/
85 :
86 : s4 nregdescfloat[] = {
87 : REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG,
88 : REG_RES, REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
89 : REG_END
90 : };
91 :
92 :
93 : const s4 abi_registers_float_argument[] = {
94 : 0, /* fa0 */
95 : 1, /* fa1 */
96 : 2, /* fa2 */
97 : 3, /* fa3 */
98 : 4, /* fa4 */
99 : 5, /* fa5 */
100 : 6, /* fa6 */
101 : 7, /* fa7 */
102 : };
103 :
104 : const s4 abi_registers_float_saved[] = {
105 : -1,
106 : };
107 :
108 : const s4 abi_registers_float_temporary[] = {
109 : 11, /* ft0 */
110 : 12, /* ft1 */
111 : 13, /* ft2 */
112 : 14, /* ft3 */
113 : 15, /* ft4 */
114 : };
115 :
116 :
117 : /* md_param_alloc **************************************************************
118 :
119 : XXX
120 :
121 : *******************************************************************************/
122 :
123 658717 : void md_param_alloc(methoddesc *md)
124 : {
125 : paramdesc *pd;
126 : s4 i;
127 : s4 iarg;
128 : s4 farg;
129 : s4 stacksize;
130 :
131 : /* set default values */
132 :
133 658717 : iarg = 0;
134 658717 : farg = 0;
135 658717 : stacksize = 0;
136 :
137 : /* get params field of methoddesc */
138 :
139 658717 : pd = md->params;
140 :
141 1796353 : for (i = 0; i < md->paramcount; i++, pd++) {
142 1137636 : switch (md->paramtypes[i].type) {
143 : case TYPE_INT:
144 : case TYPE_ADR:
145 : case TYPE_LNG:
146 1117581 : if (iarg < INT_ARG_CNT) {
147 1111285 : pd->inmemory = false;
148 1111285 : pd->index = iarg;
149 1111285 : pd->regoff = abi_registers_integer_argument[iarg];
150 1111285 : iarg++;
151 : }
152 : else {
153 6296 : pd->inmemory = true;
154 6296 : pd->index = stacksize;
155 6296 : pd->regoff = stacksize * 8;
156 6296 : stacksize++;
157 : }
158 1117581 : break;
159 :
160 : case TYPE_FLT:
161 : case TYPE_DBL:
162 20055 : if (farg < FLT_ARG_CNT) {
163 19911 : pd->inmemory = false;
164 19911 : pd->index = farg;
165 19911 : pd->regoff = abi_registers_float_argument[farg];
166 19911 : farg++;
167 : }
168 : else {
169 144 : pd->inmemory = true;
170 144 : pd->index = stacksize;
171 144 : pd->regoff = stacksize * 8;
172 144 : stacksize++;
173 : }
174 20055 : break;
175 : default:
176 0 : assert(false);
177 : break;
178 : }
179 : }
180 :
181 : /* Since XMM0 (==A0) is used for passing return values, this
182 : argument register usage has to be regarded, too. */
183 :
184 658717 : if (IS_FLT_DBL_TYPE(md->returntype.type))
185 224107 : if (farg < 1)
186 215236 : farg = 1;
187 :
188 : /* fill register and stack usage */
189 :
190 658717 : md->argintreguse = iarg;
191 658717 : md->argfltreguse = farg;
192 658717 : md->memuse = stacksize;
193 658717 : }
194 :
195 :
196 : /* md_param_alloc_native *******************************************************
197 :
198 : Pre-allocate arguments according the native ABI.
199 :
200 : *******************************************************************************/
201 :
202 15176 : void md_param_alloc_native(methoddesc *md)
203 : {
204 : /* On x86_64 we use the same ABI for JIT method calls as for
205 : native method calls. */
206 :
207 15176 : md_param_alloc(md);
208 15176 : }
209 :
210 :
211 : /* md_return_alloc *************************************************************
212 :
213 : Precolor the Java Stackelement containing the Return Value. Only
214 : for float/ double types straight forward possible, since INT_LNG
215 : types use "reserved" registers Float/Double values use a00 as
216 : return register.
217 :
218 : --- in
219 : jd: jitdata of the current method
220 : stackslot: Java Stackslot to contain the Return Value
221 :
222 : --- out
223 : if precoloring was possible:
224 : VAR(stackslot->varnum)->flags = PREALLOC
225 : ->vv.regoff = [REG_RESULT|REG_FRESULT]
226 : rd->arg[flt|int]reguse set to a value according the register usage
227 :
228 : NOTE: Do not pass a LOCALVAR in stackslot->varnum.
229 :
230 : *******************************************************************************/
231 :
232 43733 : void md_return_alloc(jitdata *jd, stackelement_t *stackslot)
233 : {
234 : methodinfo *m;
235 : codeinfo *code;
236 : registerdata *rd;
237 : methoddesc *md;
238 :
239 : /* get required compiler data */
240 :
241 43733 : m = jd->m;
242 43733 : code = jd->code;
243 43733 : rd = jd->rd;
244 :
245 43733 : md = m->parseddesc;
246 :
247 : /* precoloring only straightforward possible with flt/dbl types
248 : For Address/Integer/Long REG_RESULT == rax == REG_ITMP1 and so
249 : could be destroyed if the return value Stack Slot "lives too
250 : long" */
251 :
252 43733 : if (IS_FLT_DBL_TYPE(md->returntype.type)) {
253 : /* In Leafmethods Local Vars holding parameters are precolored
254 : to their argument register -> so leafmethods with
255 : paramcount > 0 could already use a00! */
256 :
257 163 : if (!code_is_leafmethod(code) || (md->paramcount == 0)) {
258 : /* Only precolor the stackslot, if it is not a SAVEDVAR
259 : <-> has not to survive method invokations */
260 :
261 9 : if (!(stackslot->flags & SAVEDVAR)) {
262 :
263 9 : VAR(stackslot->varnum)->flags = PREALLOC;
264 :
265 : /* float/double */
266 9 : if (rd->argfltreguse < 1)
267 0 : rd->argfltreguse = 1;
268 :
269 9 : VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
270 : }
271 : }
272 : }
273 43733 : }
274 :
275 :
276 : /*
277 : * These are local overrides for various environment variables in Emacs.
278 : * Please do not remove this and leave it at the end of the file, where
279 : * Emacs will automagically detect them.
280 : * ---------------------------------------------------------------------
281 : * Local variables:
282 : * mode: c++
283 : * indent-tabs-mode: t
284 : * c-basic-offset: 4
285 : * tab-width: 4
286 : * End:
287 : * vim:noexpandtab:sw=4:ts=4:
288 : */
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