VLA code: minor fix
[tinycc.git] / x86_64-gen.c
Commit [+]AuthorDateLineData
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Shinichiro Hamaji2008-12-02 03:19:25 +09001/*
2 * x86-64 code generator for TCC
3 *
4 * Copyright (c) 2008 Shinichiro Hamaji
5 *
6 * Based on i386-gen.c by Fabrice Bellard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
88a3ccab grischka2009-12-20 01:53:49 +010023#ifdef TARGET_DEFS_ONLY
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Shinichiro Hamaji2008-12-02 03:19:25 +090024
25/* number of available registers */
41b3c7a5 James Lyon2013-04-27 20:39:34 +010026#define NB_REGS 25
88a3ccab grischka2009-12-20 01:53:49 +010027#define NB_ASM_REGS 8
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Shinichiro Hamaji2008-12-02 03:19:25 +090028
29/* a register can belong to several classes. The classes must be
30 sorted from more general to more precise (see gv2() code which does
31 assumptions on it). */
32#define RC_INT 0x0001 /* generic integer register */
33#define RC_FLOAT 0x0002 /* generic float register */
34#define RC_RAX 0x0004
35#define RC_RCX 0x0008
36#define RC_RDX 0x0010
cbce6d2b James Lyon2013-04-19 22:05:49 +010037#define RC_ST0 0x0080 /* only for long double */
0e5c0ee0 grischka2009-12-19 00:06:41 +010038#define RC_R8 0x0100
39#define RC_R9 0x0200
ae191c3a grischka2012-03-05 20:19:28 +010040#define RC_R10 0x0400
41#define RC_R11 0x0800
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James Lyon2013-04-19 22:05:49 +010042#define RC_XMM0 0x1000
43#define RC_XMM1 0x2000
44#define RC_XMM2 0x4000
45#define RC_XMM3 0x8000
46#define RC_XMM4 0x10000
47#define RC_XMM5 0x20000
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James Lyon2013-04-25 22:30:53 +010048#define RC_XMM6 0x40000
49#define RC_XMM7 0x80000
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Shinichiro Hamaji2008-12-02 03:19:25 +090050#define RC_IRET RC_RAX /* function return: integer register */
51#define RC_LRET RC_RDX /* function return: second integer register */
52#define RC_FRET RC_XMM0 /* function return: float register */
0e17671f James Lyon2013-04-19 15:33:16 +010053#define RC_QRET RC_XMM1 /* function return: second float register */
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Shinichiro Hamaji2008-12-02 03:19:25 +090054
55/* pretty names for the registers */
56enum {
57 TREG_RAX = 0,
58 TREG_RCX = 1,
59 TREG_RDX = 2,
41b3c7a5 James Lyon2013-04-27 20:39:34 +010060 TREG_RSP = 4,
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Shinichiro Hamaji2008-12-02 03:19:25 +090061 TREG_RSI = 6,
62 TREG_RDI = 7,
946afd23 James Lyon2013-04-19 18:31:24 +010063
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Shinichiro Hamaji2008-12-02 03:19:25 +090064 TREG_R8 = 8,
65 TREG_R9 = 9,
66 TREG_R10 = 10,
67 TREG_R11 = 11,
68
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James Lyon2013-04-19 18:31:24 +010069 TREG_XMM0 = 16,
70 TREG_XMM1 = 17,
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James Lyon2013-04-19 22:05:49 +010071 TREG_XMM2 = 18,
72 TREG_XMM3 = 19,
73 TREG_XMM4 = 20,
74 TREG_XMM5 = 21,
75 TREG_XMM6 = 22,
76 TREG_XMM7 = 23,
946afd23 James Lyon2013-04-19 18:31:24 +010077
41b3c7a5 James Lyon2013-04-27 20:39:34 +010078 TREG_ST0 = 24,
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James Lyon2013-04-19 18:31:24 +010079
80 TREG_MEM = 0x20,
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Shinichiro Hamaji2008-12-02 03:19:25 +090081};
82
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +090083#define REX_BASE(reg) (((reg) >> 3) & 1)
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Shinichiro Hamaji2008-12-02 03:19:25 +090084#define REG_VALUE(reg) ((reg) & 7)
85
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Shinichiro Hamaji2008-12-02 03:19:25 +090086/* return registers for function */
87#define REG_IRET TREG_RAX /* single word int return register */
88#define REG_LRET TREG_RDX /* second word return register (for long long) */
89#define REG_FRET TREG_XMM0 /* float return register */
0e17671f James Lyon2013-04-19 15:33:16 +010090#define REG_QRET TREG_XMM1 /* second float return register */
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Shinichiro Hamaji2008-12-02 03:19:25 +090091
92/* defined if function parameters must be evaluated in reverse order */
93#define INVERT_FUNC_PARAMS
94
95/* pointer size, in bytes */
96#define PTR_SIZE 8
97
98/* long double size and alignment, in bytes */
99#define LDOUBLE_SIZE 16
6ee366e7 James Lyon2013-04-26 16:42:12 +0100100#define LDOUBLE_ALIGN 16
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900101/* maximum alignment (for aligned attribute support) */
6ee366e7 James Lyon2013-04-26 16:42:12 +0100102#define MAX_ALIGN 16
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Shinichiro Hamaji2008-12-02 03:19:25 +0900103
104/******************************************************/
105/* ELF defines */
106
107#define EM_TCC_TARGET EM_X86_64
108
109/* relocation type for 32 bit data relocation */
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Shinichiro Hamaji2009-07-19 06:42:23 +0900110#define R_DATA_32 R_X86_64_32
111#define R_DATA_PTR R_X86_64_64
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Shinichiro Hamaji2008-12-02 03:19:25 +0900112#define R_JMP_SLOT R_X86_64_JUMP_SLOT
113#define R_COPY R_X86_64_COPY
114
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Michael Matz2014-04-03 17:59:41 +0200115#define ELF_START_ADDR 0x400000
116#define ELF_PAGE_SIZE 0x200000
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Shinichiro Hamaji2008-12-02 03:19:25 +0900117
118/******************************************************/
88a3ccab grischka2009-12-20 01:53:49 +0100119#else /* ! TARGET_DEFS_ONLY */
120/******************************************************/
121#include "tcc.h"
122#include <assert.h>
123
946afd23 James Lyon2013-04-19 18:31:24 +0100124ST_DATA const int reg_classes[NB_REGS] = {
88a3ccab grischka2009-12-20 01:53:49 +0100125 /* eax */ RC_INT | RC_RAX,
126 /* ecx */ RC_INT | RC_RCX,
127 /* edx */ RC_INT | RC_RDX,
946afd23 James Lyon2013-04-19 18:31:24 +0100128 0,
41b3c7a5 James Lyon2013-04-27 20:39:34 +0100129 0,
0e5c0ee0 grischka2009-12-19 00:06:41 +0100130 0,
131 0,
132 0,
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James Lyon2013-04-19 22:05:49 +0100133 RC_R8,
134 RC_R9,
135 RC_R10,
136 RC_R11,
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James Lyon2013-04-19 18:31:24 +0100137 0,
138 0,
139 0,
140 0,
141 /* xmm0 */ RC_FLOAT | RC_XMM0,
142 /* xmm1 */ RC_FLOAT | RC_XMM1,
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James Lyon2013-04-19 22:05:49 +0100143 /* xmm2 */ RC_FLOAT | RC_XMM2,
144 /* xmm3 */ RC_FLOAT | RC_XMM3,
145 /* xmm4 */ RC_FLOAT | RC_XMM4,
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James Lyon2013-04-25 22:30:53 +0100146 /* xmm5 */ RC_FLOAT | RC_XMM5,
147 /* xmm6 an xmm7 are included so gv() can be used on them,
148 but they are not tagged with RC_FLOAT because they are
149 callee saved on Windows */
150 RC_XMM6,
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James Lyon2013-04-27 20:39:34 +0100151 RC_XMM7,
152 /* st0 */ RC_ST0
88a3ccab grischka2009-12-20 01:53:49 +0100153};
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Shinichiro Hamaji2008-12-02 03:19:25 +0900154
155static unsigned long func_sub_sp_offset;
156static int func_ret_sub;
157
158/* XXX: make it faster ? */
159void g(int c)
160{
161 int ind1;
162 ind1 = ind + 1;
163 if (ind1 > cur_text_section->data_allocated)
164 section_realloc(cur_text_section, ind1);
165 cur_text_section->data[ind] = c;
166 ind = ind1;
167}
168
169void o(unsigned int c)
170{
171 while (c) {
172 g(c);
173 c = c >> 8;
174 }
175}
176
1308e8eb grischka2009-12-19 22:08:37 +0100177void gen_le16(int v)
178{
179 g(v);
180 g(v >> 8);
181}
182
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Shinichiro Hamaji2008-12-02 03:19:25 +0900183void gen_le32(int c)
184{
185 g(c);
186 g(c >> 8);
187 g(c >> 16);
188 g(c >> 24);
189}
190
191void gen_le64(int64_t c)
192{
193 g(c);
194 g(c >> 8);
195 g(c >> 16);
196 g(c >> 24);
197 g(c >> 32);
198 g(c >> 40);
199 g(c >> 48);
200 g(c >> 56);
201}
202
070b86a8 grischka2009-12-20 02:19:51 +0100203void orex(int ll, int r, int r2, int b)
204{
205 if ((r & VT_VALMASK) >= VT_CONST)
206 r = 0;
207 if ((r2 & VT_VALMASK) >= VT_CONST)
208 r2 = 0;
209 if (ll || REX_BASE(r) || REX_BASE(r2))
210 o(0x40 | REX_BASE(r) | (REX_BASE(r2) << 2) | (ll << 3));
211 o(b);
212}
213
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Shinichiro Hamaji2008-12-02 03:19:25 +0900214/* output a symbol and patch all calls to it */
215void gsym_addr(int t, int a)
216{
217 int n, *ptr;
218 while (t) {
219 ptr = (int *)(cur_text_section->data + t);
220 n = *ptr; /* next value */
221 *ptr = a - t - 4;
222 t = n;
223 }
224}
225
226void gsym(int t)
227{
228 gsym_addr(t, ind);
229}
230
231/* psym is used to put an instruction with a data field which is a
232 reference to a symbol. It is in fact the same as oad ! */
233#define psym oad
234
235static int is64_type(int t)
236{
237 return ((t & VT_BTYPE) == VT_PTR ||
238 (t & VT_BTYPE) == VT_FUNC ||
239 (t & VT_BTYPE) == VT_LLONG);
240}
241
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900242/* instruction + 4 bytes data. Return the address of the data */
88a3ccab grischka2009-12-20 01:53:49 +0100243ST_FUNC int oad(int c, int s)
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Shinichiro Hamaji2008-12-02 03:19:25 +0900244{
245 int ind1;
246
247 o(c);
248 ind1 = ind + 4;
249 if (ind1 > cur_text_section->data_allocated)
250 section_realloc(cur_text_section, ind1);
251 *(int *)(cur_text_section->data + ind) = s;
252 s = ind;
253 ind = ind1;
254 return s;
255}
256
88a3ccab grischka2009-12-20 01:53:49 +0100257ST_FUNC void gen_addr32(int r, Sym *sym, int c)
1308e8eb grischka2009-12-19 22:08:37 +0100258{
259 if (r & VT_SYM)
260 greloc(cur_text_section, sym, ind, R_X86_64_32);
261 gen_le32(c);
262}
263
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900264/* output constant with relocation if 'r & VT_SYM' is true */
88a3ccab grischka2009-12-20 01:53:49 +0100265ST_FUNC void gen_addr64(int r, Sym *sym, int64_t c)
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Shinichiro Hamaji2008-12-02 03:19:25 +0900266{
267 if (r & VT_SYM)
268 greloc(cur_text_section, sym, ind, R_X86_64_64);
269 gen_le64(c);
270}
271
272/* output constant with relocation if 'r & VT_SYM' is true */
88a3ccab grischka2009-12-20 01:53:49 +0100273ST_FUNC void gen_addrpc32(int r, Sym *sym, int c)
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Shinichiro Hamaji2008-12-02 03:19:25 +0900274{
275 if (r & VT_SYM)
276 greloc(cur_text_section, sym, ind, R_X86_64_PC32);
277 gen_le32(c-4);
278}
279
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Shinichiro Hamaji2009-04-13 00:27:04 +0900280/* output got address with relocation */
281static void gen_gotpcrel(int r, Sym *sym, int c)
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900282{
45987579 grischka2009-07-18 22:05:49 +0200283#ifndef TCC_TARGET_PE
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Shinichiro Hamaji2009-04-13 00:27:04 +0900284 Section *sr;
285 ElfW(Rela) *rel;
286 greloc(cur_text_section, sym, ind, R_X86_64_GOTPCREL);
287 sr = cur_text_section->reloc;
288 rel = (ElfW(Rela) *)(sr->data + sr->data_offset - sizeof(ElfW(Rela)));
289 rel->r_addend = -4;
45987579 grischka2009-07-18 22:05:49 +0200290#else
6e0a658e grischka2014-05-08 17:32:29 +0200291 tcc_error("internal error: no GOT on PE: %s %x %x | %02x %02x %02x\n",
292 get_tok_str(sym->v, NULL), c, r,
45987579 grischka2009-07-18 22:05:49 +0200293 cur_text_section->data[ind-3],
294 cur_text_section->data[ind-2],
295 cur_text_section->data[ind-1]
296 );
297 greloc(cur_text_section, sym, ind, R_X86_64_PC32);
298#endif
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900299 gen_le32(0);
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Shinichiro Hamaji2009-04-13 00:27:04 +0900300 if (c) {
301 /* we use add c, %xxx for displacement */
070b86a8 grischka2009-12-20 02:19:51 +0100302 orex(1, r, 0, 0x81);
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Shinichiro Hamaji2009-04-13 00:27:04 +0900303 o(0xc0 + REG_VALUE(r));
304 gen_le32(c);
305 }
306}
307
308static void gen_modrm_impl(int op_reg, int r, Sym *sym, int c, int is_got)
309{
310 op_reg = REG_VALUE(op_reg) << 3;
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Shinichiro Hamaji2008-12-02 03:19:25 +0900311 if ((r & VT_VALMASK) == VT_CONST) {
312 /* constant memory reference */
313 o(0x05 | op_reg);
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Shinichiro Hamaji2009-04-13 00:27:04 +0900314 if (is_got) {
315 gen_gotpcrel(r, sym, c);
316 } else {
317 gen_addrpc32(r, sym, c);
318 }
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Shinichiro Hamaji2008-12-02 03:19:25 +0900319 } else if ((r & VT_VALMASK) == VT_LOCAL) {
320 /* currently, we use only ebp as base */
321 if (c == (char)c) {
322 /* short reference */
323 o(0x45 | op_reg);
324 g(c);
325 } else {
326 oad(0x85 | op_reg, c);
327 }
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Shinichiro Hamaji2009-04-13 00:27:04 +0900328 } else if ((r & VT_VALMASK) >= TREG_MEM) {
329 if (c) {
330 g(0x80 | op_reg | REG_VALUE(r));
331 gen_le32(c);
332 } else {
333 g(0x00 | op_reg | REG_VALUE(r));
334 }
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900335 } else {
0e5c0ee0 grischka2009-12-19 00:06:41 +0100336 g(0x00 | op_reg | REG_VALUE(r));
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Shinichiro Hamaji2008-12-02 03:19:25 +0900337 }
338}
339
340/* generate a modrm reference. 'op_reg' contains the addtionnal 3
341 opcode bits */
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Shinichiro Hamaji2009-04-13 00:27:04 +0900342static void gen_modrm(int op_reg, int r, Sym *sym, int c)
343{
344 gen_modrm_impl(op_reg, r, sym, c, 0);
345}
346
347/* generate a modrm reference. 'op_reg' contains the addtionnal 3
348 opcode bits */
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Shinichiro Hamaji2008-12-02 03:19:25 +0900349static void gen_modrm64(int opcode, int op_reg, int r, Sym *sym, int c)
350{
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900351 int is_got;
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900352 is_got = (op_reg & TREG_MEM) && !(sym->type.t & VT_STATIC);
b5486240 grischka2009-12-20 20:33:21 +0100353 orex(1, r, op_reg, opcode);
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900354 gen_modrm_impl(op_reg, r, sym, c, is_got);
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Shinichiro Hamaji2008-12-02 03:19:25 +0900355}
356
357
358/* load 'r' from value 'sv' */
359void load(int r, SValue *sv)
360{
361 int v, t, ft, fc, fr;
362 SValue v1;
363
94bf4d2c grischka2009-12-19 22:08:52 +0100364#ifdef TCC_TARGET_PE
2341ee51 grischka2010-01-14 20:55:51 +0100365 SValue v2;
366 sv = pe_getimport(sv, &v2);
94bf4d2c grischka2009-12-19 22:08:52 +0100367#endif
368
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900369 fr = sv->r;
d0dae7f2 Thomas Preud'homme2014-02-07 22:31:44 +0800370 ft = sv->type.t & ~VT_DEFSIGN;
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Shinichiro Hamaji2008-12-02 03:19:25 +0900371 fc = sv->c.ul;
372
45987579 grischka2009-07-18 22:05:49 +0200373#ifndef TCC_TARGET_PE
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Shinichiro Hamaji2009-04-13 00:27:04 +0900374 /* we use indirect access via got */
375 if ((fr & VT_VALMASK) == VT_CONST && (fr & VT_SYM) &&
376 (fr & VT_LVAL) && !(sv->sym->type.t & VT_STATIC)) {
377 /* use the result register as a temporal register */
378 int tr = r | TREG_MEM;
379 if (is_float(ft)) {
380 /* we cannot use float registers as a temporal register */
381 tr = get_reg(RC_INT) | TREG_MEM;
382 }
383 gen_modrm64(0x8b, tr, fr, sv->sym, 0);
384
385 /* load from the temporal register */
386 fr = tr | VT_LVAL;
387 }
45987579 grischka2009-07-18 22:05:49 +0200388#endif
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900389
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Shinichiro Hamaji2008-12-02 03:19:25 +0900390 v = fr & VT_VALMASK;
391 if (fr & VT_LVAL) {
070b86a8 grischka2009-12-20 02:19:51 +0100392 int b, ll;
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Shinichiro Hamaji2008-12-02 03:19:25 +0900393 if (v == VT_LLOCAL) {
394 v1.type.t = VT_PTR;
395 v1.r = VT_LOCAL | VT_LVAL;
396 v1.c.ul = fc;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900397 fr = r;
059aea5d Philip2015-04-23 18:08:28 +0000398 if (!(reg_classes[fr] & (RC_INT|RC_R11)))
ae191c3a grischka2012-03-05 20:19:28 +0100399 fr = get_reg(RC_INT);
400 load(fr, &v1);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900401 }
070b86a8 grischka2009-12-20 02:19:51 +0100402 ll = 0;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900403 if ((ft & VT_BTYPE) == VT_FLOAT) {
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James Lyon2013-04-19 18:31:24 +0100404 b = 0x6e0f66;
405 r = REG_VALUE(r); /* movd */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900406 } else if ((ft & VT_BTYPE) == VT_DOUBLE) {
0e17671f James Lyon2013-04-19 15:33:16 +0100407 b = 0x7e0ff3; /* movq */
946afd23 James Lyon2013-04-19 18:31:24 +0100408 r = REG_VALUE(r);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900409 } else if ((ft & VT_BTYPE) == VT_LDOUBLE) {
070b86a8 grischka2009-12-20 02:19:51 +0100410 b = 0xdb, r = 5; /* fldt */
f6b50558 Thomas Preud'homme2013-06-14 16:18:16 +0200411 } else if ((ft & VT_TYPE) == VT_BYTE || (ft & VT_TYPE) == VT_BOOL) {
070b86a8 grischka2009-12-20 02:19:51 +0100412 b = 0xbe0f; /* movsbl */
413 } else if ((ft & VT_TYPE) == (VT_BYTE | VT_UNSIGNED)) {
414 b = 0xb60f; /* movzbl */
415 } else if ((ft & VT_TYPE) == VT_SHORT) {
416 b = 0xbf0f; /* movswl */
417 } else if ((ft & VT_TYPE) == (VT_SHORT | VT_UNSIGNED)) {
418 b = 0xb70f; /* movzwl */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900419 } else {
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James Lyon2013-04-19 15:33:16 +0100420 assert(((ft & VT_BTYPE) == VT_INT) || ((ft & VT_BTYPE) == VT_LLONG)
421 || ((ft & VT_BTYPE) == VT_PTR) || ((ft & VT_BTYPE) == VT_ENUM)
422 || ((ft & VT_BTYPE) == VT_FUNC));
070b86a8 grischka2009-12-20 02:19:51 +0100423 ll = is64_type(ft);
424 b = 0x8b;
425 }
426 if (ll) {
427 gen_modrm64(b, r, fr, sv->sym, fc);
428 } else {
429 orex(ll, fr, r, b);
430 gen_modrm(r, fr, sv->sym, fc);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900431 }
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Shinichiro Hamaji2008-12-02 03:19:25 +0900432 } else {
433 if (v == VT_CONST) {
bb5e0df7 grischka2009-07-18 22:07:03 +0200434 if (fr & VT_SYM) {
435#ifdef TCC_TARGET_PE
070b86a8 grischka2009-12-20 02:19:51 +0100436 orex(1,0,r,0x8d);
bb5e0df7 grischka2009-07-18 22:07:03 +0200437 o(0x05 + REG_VALUE(r) * 8); /* lea xx(%rip), r */
438 gen_addrpc32(fr, sv->sym, fc);
439#else
440 if (sv->sym->type.t & VT_STATIC) {
070b86a8 grischka2009-12-20 02:19:51 +0100441 orex(1,0,r,0x8d);
bb5e0df7 grischka2009-07-18 22:07:03 +0200442 o(0x05 + REG_VALUE(r) * 8); /* lea xx(%rip), r */
443 gen_addrpc32(fr, sv->sym, fc);
444 } else {
070b86a8 grischka2009-12-20 02:19:51 +0100445 orex(1,0,r,0x8b);
bb5e0df7 grischka2009-07-18 22:07:03 +0200446 o(0x05 + REG_VALUE(r) * 8); /* mov xx(%rip), r */
1d0a5c25 Michael Matz2012-04-15 19:29:45 +0200447 gen_gotpcrel(r, sv->sym, fc);
bb5e0df7 grischka2009-07-18 22:07:03 +0200448 }
449#endif
450 } else if (is64_type(ft)) {
070b86a8 grischka2009-12-20 02:19:51 +0100451 orex(1,r,0, 0xb8 + REG_VALUE(r)); /* mov $xx, r */
bb5e0df7 grischka2009-07-18 22:07:03 +0200452 gen_le64(sv->c.ull);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900453 } else {
070b86a8 grischka2009-12-20 02:19:51 +0100454 orex(0,r,0, 0xb8 + REG_VALUE(r)); /* mov $xx, r */
bb5e0df7 grischka2009-07-18 22:07:03 +0200455 gen_le32(fc);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900456 }
457 } else if (v == VT_LOCAL) {
070b86a8 grischka2009-12-20 02:19:51 +0100458 orex(1,0,r,0x8d); /* lea xxx(%ebp), r */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900459 gen_modrm(r, VT_LOCAL, sv->sym, fc);
460 } else if (v == VT_CMP) {
070b86a8 grischka2009-12-20 02:19:51 +0100461 orex(0,r,0,0);
2daae0dc
MM
Michael Matz2012-05-13 02:21:51 +0200462 if ((fc & ~0x100) != TOK_NE)
463 oad(0xb8 + REG_VALUE(r), 0); /* mov $0, r */
464 else
465 oad(0xb8 + REG_VALUE(r), 1); /* mov $1, r */
466 if (fc & 0x100)
467 {
468 /* This was a float compare. If the parity bit is
469 set the result was unordered, meaning false for everything
470 except TOK_NE, and true for TOK_NE. */
471 fc &= ~0x100;
472 o(0x037a + (REX_BASE(r) << 8));
473 }
070b86a8 grischka2009-12-20 02:19:51 +0100474 orex(0,r,0, 0x0f); /* setxx %br */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900475 o(fc);
0e5c0ee0 grischka2009-12-19 00:06:41 +0100476 o(0xc0 + REG_VALUE(r));
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900477 } else if (v == VT_JMP || v == VT_JMPI) {
478 t = v & 1;
070b86a8 grischka2009-12-20 02:19:51 +0100479 orex(0,r,0,0);
0e5c0ee0 grischka2009-12-19 00:06:41 +0100480 oad(0xb8 + REG_VALUE(r), t); /* mov $1, r */
481 o(0x05eb + (REX_BASE(r) << 8)); /* jmp after */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900482 gsym(fc);
070b86a8 grischka2009-12-20 02:19:51 +0100483 orex(0,r,0,0);
0e5c0ee0 grischka2009-12-19 00:06:41 +0100484 oad(0xb8 + REG_VALUE(r), t ^ 1); /* mov $0, r */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900485 } else if (v != r) {
5c35ba66 James Lyon2013-04-24 02:19:15 +0100486 if ((r >= TREG_XMM0) && (r <= TREG_XMM7)) {
0e17671f
JL
James Lyon2013-04-19 15:33:16 +0100487 if (v == TREG_ST0) {
488 /* gen_cvt_ftof(VT_DOUBLE); */
489 o(0xf0245cdd); /* fstpl -0x10(%rsp) */
490 /* movsd -0x10(%rsp),%xmmN */
491 o(0x100ff2);
946afd23 James Lyon2013-04-19 18:31:24 +0100492 o(0x44 + REG_VALUE(r)*8); /* %xmmN */
0e17671f
JL
James Lyon2013-04-19 15:33:16 +0100493 o(0xf024);
494 } else {
5c35ba66 James Lyon2013-04-24 02:19:15 +0100495 assert((v >= TREG_XMM0) && (v <= TREG_XMM7));
0e17671f
JL
James Lyon2013-04-19 15:33:16 +0100496 if ((ft & VT_BTYPE) == VT_FLOAT) {
497 o(0x100ff3);
498 } else {
499 assert((ft & VT_BTYPE) == VT_DOUBLE);
500 o(0x100ff2);
501 }
946afd23 James Lyon2013-04-19 18:31:24 +0100502 o(0xc0 + REG_VALUE(v) + REG_VALUE(r)*8);
0e17671f James Lyon2013-04-19 15:33:16 +0100503 }
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900504 } else if (r == TREG_ST0) {
fdb3b10d Thomas Preud'homme2014-03-08 18:36:02 +0800505 assert((v >= TREG_XMM0) && (v <= TREG_XMM7));
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900506 /* gen_cvt_ftof(VT_LDOUBLE); */
946afd23 James Lyon2013-04-19 18:31:24 +0100507 /* movsd %xmmN,-0x10(%rsp) */
0e17671f James Lyon2013-04-19 15:33:16 +0100508 o(0x110ff2);
946afd23 James Lyon2013-04-19 18:31:24 +0100509 o(0x44 + REG_VALUE(r)*8); /* %xmmN */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900510 o(0xf024);
511 o(0xf02444dd); /* fldl -0x10(%rsp) */
512 } else {
070b86a8 grischka2009-12-20 02:19:51 +0100513 orex(1,r,v, 0x89);
0e5c0ee0 grischka2009-12-19 00:06:41 +0100514 o(0xc0 + REG_VALUE(r) + REG_VALUE(v) * 8); /* mov v, r */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900515 }
516 }
517 }
518}
519
520/* store register 'r' in lvalue 'v' */
521void store(int r, SValue *v)
522{
523 int fr, bt, ft, fc;
524 int op64 = 0;
830b7533
SH
Shinichiro Hamaji2009-04-13 00:27:04 +0900525 /* store the REX prefix in this variable when PIC is enabled */
526 int pic = 0;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900527
94bf4d2c grischka2009-12-19 22:08:52 +0100528#ifdef TCC_TARGET_PE
2341ee51 grischka2010-01-14 20:55:51 +0100529 SValue v2;
530 v = pe_getimport(v, &v2);
94bf4d2c grischka2009-12-19 22:08:52 +0100531#endif
532
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900533 ft = v->type.t;
534 fc = v->c.ul;
535 fr = v->r & VT_VALMASK;
536 bt = ft & VT_BTYPE;
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900537
45987579 grischka2009-07-18 22:05:49 +0200538#ifndef TCC_TARGET_PE
830b7533
SH
Shinichiro Hamaji2009-04-13 00:27:04 +0900539 /* we need to access the variable via got */
540 if (fr == VT_CONST && (v->r & VT_SYM)) {
541 /* mov xx(%rip), %r11 */
542 o(0x1d8b4c);
543 gen_gotpcrel(TREG_R11, v->sym, v->c.ul);
544 pic = is64_type(bt) ? 0x49 : 0x41;
545 }
45987579 grischka2009-07-18 22:05:49 +0200546#endif
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900547
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900548 /* XXX: incorrect if float reg to reg */
549 if (bt == VT_FLOAT) {
830b7533
SH
Shinichiro Hamaji2009-04-13 00:27:04 +0900550 o(0x66);
551 o(pic);
552 o(0x7e0f); /* movd */
946afd23 James Lyon2013-04-19 18:31:24 +0100553 r = REG_VALUE(r);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900554 } else if (bt == VT_DOUBLE) {
830b7533
SH
Shinichiro Hamaji2009-04-13 00:27:04 +0900555 o(0x66);
556 o(pic);
557 o(0xd60f); /* movq */
946afd23 James Lyon2013-04-19 18:31:24 +0100558 r = REG_VALUE(r);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900559 } else if (bt == VT_LDOUBLE) {
560 o(0xc0d9); /* fld %st(0) */
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900561 o(pic);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900562 o(0xdb); /* fstpt */
563 r = 7;
564 } else {
565 if (bt == VT_SHORT)
566 o(0x66);
830b7533 Shinichiro Hamaji2009-04-13 00:27:04 +0900567 o(pic);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900568 if (bt == VT_BYTE || bt == VT_BOOL)
070b86a8 grischka2009-12-20 02:19:51 +0100569 orex(0, 0, r, 0x88);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900570 else if (is64_type(bt))
571 op64 = 0x89;
572 else
070b86a8 grischka2009-12-20 02:19:51 +0100573 orex(0, 0, r, 0x89);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +0900574 }
830b7533
SH
Shinichiro Hamaji2009-04-13 00:27:04 +0900575 if (pic) {
576 /* xxx r, (%r11) where xxx is mov, movq, fld, or etc */
577 if (op64)
578 o(op64);
579 o(3 + (r << 3));
580 } else if (op64) {
0e5c0ee0 grischka2009-12-19 00:06:41 +0100581 if (fr == VT_CONST || fr == VT_LOCAL || (v->r & VT_LVAL)) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900582 gen_modrm64(op64, r, v->r, v->sym, fc);
583 } else if (fr != r) {
584 /* XXX: don't we really come here? */
585 abort();
586 o(0xc0 + fr + r * 8); /* mov r, fr */
587 }
588 } else {
0e5c0ee0 grischka2009-12-19 00:06:41 +0100589 if (fr == VT_CONST || fr == VT_LOCAL || (v->r & VT_LVAL)) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900590 gen_modrm(r, v->r, v->sym, fc);
591 } else if (fr != r) {
592 /* XXX: don't we really come here? */
593 abort();
594 o(0xc0 + fr + r * 8); /* mov r, fr */
595 }
596 }
597}
598
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900599/* 'is_jmp' is '1' if it is a jump */
600static void gcall_or_jmp(int is_jmp)
601{
602 int r;
aacf65bb
P
Philip2015-04-23 17:30:16 +0000603 if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST &&
604 ((vtop->r & VT_SYM) || (vtop->c.ll-4) == (int)(vtop->c.ll-4))) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900605 /* constant case */
606 if (vtop->r & VT_SYM) {
607 /* relocation case */
6e0a658e grischka2014-05-08 17:32:29 +0200608#ifdef TCC_TARGET_PE
609 greloc(cur_text_section, vtop->sym, ind + 1, R_X86_64_PC32);
610#else
611 greloc(cur_text_section, vtop->sym, ind + 1, R_X86_64_PLT32);
612#endif
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +0900613 } else {
614 /* put an empty PC32 relocation */
615 put_elf_reloc(symtab_section, cur_text_section,
616 ind + 1, R_X86_64_PC32, 0);
617 }
618 oad(0xe8 + is_jmp, vtop->c.ul - 4); /* call/jmp im */
619 } else {
620 /* otherwise, indirect call */
621 r = TREG_R11;
622 load(r, vtop);
623 o(0x41); /* REX */
624 o(0xff); /* call/jmp *r */
625 o(0xd0 + REG_VALUE(r) + (is_jmp << 4));
626 }
627}
628
559675b9 seyko2015-04-10 15:17:22 +0300629#if defined(CONFIG_TCC_BCHECK)
630#ifndef TCC_TARGET_PE
631static addr_t func_bound_offset;
632static unsigned long func_bound_ind;
633#endif
634
635static void gen_static_call(int v)
636{
637 Sym *sym = external_global_sym(v, &func_old_type, 0);
638 oad(0xe8, -4);
639 greloc(cur_text_section, sym, ind-4, R_X86_64_PC32);
640}
641
642/* generate a bounded pointer addition */
643ST_FUNC void gen_bounded_ptr_add(void)
644{
645 /* save all temporary registers */
646 save_regs(0);
647
648 /* prepare fast x86_64 function call */
649 gv(RC_RAX);
650 o(0xc68948); // mov %rax,%rsi ## second arg in %rsi, this must be size
651 vtop--;
652
653 gv(RC_RAX);
654 o(0xc78948); // mov %rax,%rdi ## first arg in %rdi, this must be ptr
655 vtop--;
656
657 /* do a fast function call */
658 gen_static_call(TOK___bound_ptr_add);
659
660 /* returned pointer is in rax */
661 vtop++;
662 vtop->r = TREG_RAX | VT_BOUNDED;
663
664
665 /* relocation offset of the bounding function call point */
666 vtop->c.ull = (cur_text_section->reloc->data_offset - sizeof(ElfW(Rela)));
667}
668
669/* patch pointer addition in vtop so that pointer dereferencing is
670 also tested */
671ST_FUNC void gen_bounded_ptr_deref(void)
672{
673 addr_t func;
674 int size, align;
675 ElfW(Rela) *rel;
676 Sym *sym;
677
678 size = 0;
679 /* XXX: put that code in generic part of tcc */
680 if (!is_float(vtop->type.t)) {
681 if (vtop->r & VT_LVAL_BYTE)
682 size = 1;
683 else if (vtop->r & VT_LVAL_SHORT)
684 size = 2;
685 }
686 if (!size)
687 size = type_size(&vtop->type, &align);
688 switch(size) {
689 case 1: func = TOK___bound_ptr_indir1; break;
690 case 2: func = TOK___bound_ptr_indir2; break;
691 case 4: func = TOK___bound_ptr_indir4; break;
692 case 8: func = TOK___bound_ptr_indir8; break;
693 case 12: func = TOK___bound_ptr_indir12; break;
694 case 16: func = TOK___bound_ptr_indir16; break;
695 default:
696 tcc_error("unhandled size when dereferencing bounded pointer");
697 func = 0;
698 break;
699 }
700
701 sym = external_global_sym(func, &func_old_type, 0);
702 if (!sym->c)
703 put_extern_sym(sym, NULL, 0, 0);
704
705 /* patch relocation */
706 /* XXX: find a better solution ? */
707
708 rel = (ElfW(Rela) *)(cur_text_section->reloc->data + vtop->c.ull);
709 rel->r_info = ELF64_R_INFO(sym->c, ELF64_R_TYPE(rel->r_info));
710}
711#endif
712
45987579 grischka2009-07-18 22:05:49 +0200713#ifdef TCC_TARGET_PE
50b040ef grischka2009-12-19 22:40:28 +0100714
45987579 grischka2009-07-18 22:05:49 +0200715#define REGN 4
5c35ba66 James Lyon2013-04-24 02:19:15 +0100716static const uint8_t arg_regs[REGN] = {
45987579 grischka2009-07-18 22:05:49 +0200717 TREG_RCX, TREG_RDX, TREG_R8, TREG_R9
718};
50b040ef grischka2009-12-19 22:40:28 +0100719
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100720/* Prepare arguments in R10 and R11 rather than RCX and RDX
721 because gv() will not ever use these */
722static int arg_prepare_reg(int idx) {
723 if (idx == 0 || idx == 1)
724 /* idx=0: r10, idx=1: r11 */
725 return idx + 10;
726 else
727 return arg_regs[idx];
728}
729
50b040ef grischka2009-12-19 22:40:28 +0100730static int func_scratch;
731
732/* Generate function call. The function address is pushed first, then
733 all the parameters in call order. This functions pops all the
734 parameters and the function address. */
735
736void gen_offs_sp(int b, int r, int d)
737{
070b86a8 grischka2009-12-20 02:19:51 +0100738 orex(1,0,r & 0x100 ? 0 : r, b);
50b040ef grischka2009-12-19 22:40:28 +0100739 if (d == (char)d) {
070b86a8 grischka2009-12-20 02:19:51 +0100740 o(0x2444 | (REG_VALUE(r) << 3));
50b040ef grischka2009-12-19 22:40:28 +0100741 g(d);
742 } else {
070b86a8 grischka2009-12-20 02:19:51 +0100743 o(0x2484 | (REG_VALUE(r) << 3));
50b040ef grischka2009-12-19 22:40:28 +0100744 gen_le32(d);
745 }
746}
747
dcec8673
TP
Thomas Preud'homme2013-11-22 09:27:15 +0800748/* Return the number of registers needed to return the struct, or 0 if
749 returning via struct pointer. */
50899e30 Michael Matz2015-03-09 00:19:59 +0100750ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret, int *ret_align, int *regsize)
be1b6ba7 grischka2013-04-30 00:33:34 +0200751{
5c35ba66 James Lyon2013-04-24 02:19:15 +0100752 int size, align;
50899e30 Michael Matz2015-03-09 00:19:59 +0100753 *regsize = 8;
be1b6ba7 grischka2013-04-30 00:33:34 +0200754 *ret_align = 1; // Never have to re-align return values for x86-64
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100755 size = type_size(vt, &align);
756 ret->ref = NULL;
757 if (size > 8) {
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +0800758 return 0;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100759 } else if (size > 4) {
760 ret->t = VT_LLONG;
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +0800761 return 1;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100762 } else if (size > 2) {
763 ret->t = VT_INT;
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +0800764 return 1;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100765 } else if (size > 1) {
766 ret->t = VT_SHORT;
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +0800767 return 1;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100768 } else {
769 ret->t = VT_BYTE;
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +0800770 return 1;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100771 }
772}
773
0f5942c6
TP
Thomas Preud'homme2013-09-24 15:36:04 +0200774static int is_sse_float(int t) {
775 int bt;
776 bt = t & VT_BTYPE;
777 return bt == VT_DOUBLE || bt == VT_FLOAT;
778}
779
5c35ba66 James Lyon2013-04-24 02:19:15 +0100780int gfunc_arg_size(CType *type) {
be1b6ba7 grischka2013-04-30 00:33:34 +0200781 int align;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100782 if (type->t & (VT_ARRAY|VT_BITFIELD))
783 return 8;
5c35ba66 James Lyon2013-04-24 02:19:15 +0100784 return type_size(type, &align);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +0100785}
786
50b040ef grischka2009-12-19 22:40:28 +0100787void gfunc_call(int nb_args)
788{
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100789 int size, r, args_size, i, d, bt, struct_size;
790 int arg;
50b040ef grischka2009-12-19 22:40:28 +0100791
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100792 args_size = (nb_args < REGN ? REGN : nb_args) * PTR_SIZE;
793 arg = nb_args;
50b040ef grischka2009-12-19 22:40:28 +0100794
795 /* for struct arguments, we need to call memcpy and the function
796 call breaks register passing arguments we are preparing.
797 So, we process arguments which will be passed by stack first. */
8d107d9f grischka2010-12-17 13:15:01 +0100798 struct_size = args_size;
50b040ef grischka2009-12-19 22:40:28 +0100799 for(i = 0; i < nb_args; i++) {
be1b6ba7 grischka2013-04-30 00:33:34 +0200800 SValue *sv;
5c35ba66 James Lyon2013-04-24 02:19:15 +0100801
be1b6ba7 grischka2013-04-30 00:33:34 +0200802 --arg;
803 sv = &vtop[-i];
50b040ef grischka2009-12-19 22:40:28 +0100804 bt = (sv->type.t & VT_BTYPE);
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100805 size = gfunc_arg_size(&sv->type);
806
807 if (size <= 8)
808 continue; /* arguments smaller than 8 bytes passed in registers or on stack */
809
50b040ef grischka2009-12-19 22:40:28 +0100810 if (bt == VT_STRUCT) {
50b040ef grischka2009-12-19 22:40:28 +0100811 /* align to stack align size */
9d347f87 Shinichiro Hamaji2010-08-27 02:49:09 +0900812 size = (size + 15) & ~15;
50b040ef grischka2009-12-19 22:40:28 +0100813 /* generate structure store */
814 r = get_reg(RC_INT);
8d107d9f grischka2010-12-17 13:15:01 +0100815 gen_offs_sp(0x8d, r, struct_size);
816 struct_size += size;
50b040ef grischka2009-12-19 22:40:28 +0100817
818 /* generate memcpy call */
819 vset(&sv->type, r | VT_LVAL, 0);
4a01eb09 grischka2009-12-19 22:41:26 +0100820 vpushv(sv);
50b040ef grischka2009-12-19 22:40:28 +0100821 vstore();
822 --vtop;
50b040ef grischka2009-12-19 22:40:28 +0100823 } else if (bt == VT_LDOUBLE) {
50b040ef grischka2009-12-19 22:40:28 +0100824 gv(RC_ST0);
8d107d9f grischka2010-12-17 13:15:01 +0100825 gen_offs_sp(0xdb, 0x107, struct_size);
826 struct_size += 16;
50b040ef grischka2009-12-19 22:40:28 +0100827 }
828 }
829
8d107d9f grischka2010-12-17 13:15:01 +0100830 if (func_scratch < struct_size)
831 func_scratch = struct_size;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100832
833 arg = nb_args;
8d107d9f grischka2010-12-17 13:15:01 +0100834 struct_size = args_size;
835
50b040ef grischka2009-12-19 22:40:28 +0100836 for(i = 0; i < nb_args; i++) {
5c35ba66 James Lyon2013-04-24 02:19:15 +0100837 --arg;
50b040ef grischka2009-12-19 22:40:28 +0100838 bt = (vtop->type.t & VT_BTYPE);
8d107d9f grischka2010-12-17 13:15:01 +0100839
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100840 size = gfunc_arg_size(&vtop->type);
841 if (size > 8) {
8d107d9f grischka2010-12-17 13:15:01 +0100842 /* align to stack align size */
843 size = (size + 15) & ~15;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100844 if (arg >= REGN) {
845 d = get_reg(RC_INT);
8d107d9f grischka2010-12-17 13:15:01 +0100846 gen_offs_sp(0x8d, d, struct_size);
5c35ba66 James Lyon2013-04-24 02:19:15 +0100847 gen_offs_sp(0x89, d, arg*8);
8d107d9f grischka2010-12-17 13:15:01 +0100848 } else {
5c35ba66 James Lyon2013-04-24 02:19:15 +0100849 d = arg_prepare_reg(arg);
8d107d9f grischka2010-12-17 13:15:01 +0100850 gen_offs_sp(0x8d, d, struct_size);
851 }
852 struct_size += size;
50b040ef grischka2009-12-19 22:40:28 +0100853 } else {
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100854 if (is_sse_float(vtop->type.t)) {
855 gv(RC_XMM0); /* only use one float register */
856 if (arg >= REGN) {
857 /* movq %xmm0, j*8(%rsp) */
858 gen_offs_sp(0xd60f66, 0x100, arg*8);
859 } else {
860 /* movaps %xmm0, %xmmN */
861 o(0x280f);
862 o(0xc0 + (arg << 3));
863 d = arg_prepare_reg(arg);
864 /* mov %xmm0, %rxx */
865 o(0x66);
866 orex(1,d,0, 0x7e0f);
867 o(0xc0 + REG_VALUE(d));
868 }
50b040ef grischka2009-12-19 22:40:28 +0100869 } else {
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100870 if (bt == VT_STRUCT) {
871 vtop->type.ref = NULL;
872 vtop->type.t = size > 4 ? VT_LLONG : size > 2 ? VT_INT
873 : size > 1 ? VT_SHORT : VT_BYTE;
874 }
875
876 r = gv(RC_INT);
877 if (arg >= REGN) {
878 gen_offs_sp(0x89, r, arg*8);
0e5c0ee0 grischka2009-12-19 00:06:41 +0100879 } else {
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100880 d = arg_prepare_reg(arg);
881 orex(1,d,r,0x89); /* mov */
882 o(0xc0 + REG_VALUE(r) * 8 + REG_VALUE(d));
50b040ef grischka2009-12-19 22:40:28 +0100883 }
884 }
885 }
886 vtop--;
887 }
0e5c0ee0 grischka2009-12-19 00:06:41 +0100888 save_regs(0);
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100889
890 /* Copy R10 and R11 into RCX and RDX, respectively */
891 if (nb_args > 0) {
892 o(0xd1894c); /* mov %r10, %rcx */
893 if (nb_args > 1) {
894 o(0xda894c); /* mov %r11, %rdx */
895 }
896 }
897
50b040ef grischka2009-12-19 22:40:28 +0100898 gcall_or_jmp(0);
899 vtop--;
900}
901
902
903#define FUNC_PROLOG_SIZE 11
904
905/* generate function prolog of type 't' */
906void gfunc_prolog(CType *func_type)
907{
5c35ba66 James Lyon2013-04-24 02:19:15 +0100908 int addr, reg_param_index, bt, size;
50b040ef grischka2009-12-19 22:40:28 +0100909 Sym *sym;
910 CType *type;
911
912 func_ret_sub = 0;
913 func_scratch = 0;
914 loc = 0;
915
916 addr = PTR_SIZE * 2;
917 ind += FUNC_PROLOG_SIZE;
918 func_sub_sp_offset = ind;
919 reg_param_index = 0;
920
921 sym = func_type->ref;
922
923 /* if the function returns a structure, then add an
924 implicit pointer parameter */
925 func_vt = sym->type;
8efaa711 Thomas Preud'homme2014-01-06 22:27:39 +0800926 func_var = (sym->c == FUNC_ELLIPSIS);
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100927 size = gfunc_arg_size(&func_vt);
928 if (size > 8) {
50b040ef grischka2009-12-19 22:40:28 +0100929 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, addr);
5c35ba66 James Lyon2013-04-24 02:19:15 +0100930 func_vc = addr;
50b040ef grischka2009-12-19 22:40:28 +0100931 reg_param_index++;
5c35ba66 James Lyon2013-04-24 02:19:15 +0100932 addr += 8;
50b040ef grischka2009-12-19 22:40:28 +0100933 }
934
935 /* define parameters */
936 while ((sym = sym->next) != NULL) {
937 type = &sym->type;
938 bt = type->t & VT_BTYPE;
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100939 size = gfunc_arg_size(type);
940 if (size > 8) {
941 if (reg_param_index < REGN) {
942 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, addr);
943 }
8d107d9f grischka2010-12-17 13:15:01 +0100944 sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | VT_LVAL | VT_REF, addr);
945 } else {
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100946 if (reg_param_index < REGN) {
947 /* save arguments passed by register */
948 if ((bt == VT_FLOAT) || (bt == VT_DOUBLE)) {
949 o(0xd60f66); /* movq */
950 gen_modrm(reg_param_index, VT_LOCAL, NULL, addr);
951 } else {
952 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, addr);
953 }
954 }
8d107d9f grischka2010-12-17 13:15:01 +0100955 sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | VT_LVAL, addr);
956 }
5c35ba66 James Lyon2013-04-24 02:19:15 +0100957 addr += 8;
50b040ef grischka2009-12-19 22:40:28 +0100958 reg_param_index++;
50b040ef grischka2009-12-19 22:40:28 +0100959 }
960
961 while (reg_param_index < REGN) {
5c35ba66 James Lyon2013-04-24 02:19:15 +0100962 if (func_type->ref->c == FUNC_ELLIPSIS) {
50b040ef grischka2009-12-19 22:40:28 +0100963 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, addr);
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +0100964 addr += 8;
965 }
50b040ef grischka2009-12-19 22:40:28 +0100966 reg_param_index++;
50b040ef grischka2009-12-19 22:40:28 +0100967 }
50b040ef grischka2009-12-19 22:40:28 +0100968}
969
970/* generate function epilog */
971void gfunc_epilog(void)
972{
973 int v, saved_ind;
974
975 o(0xc9); /* leave */
976 if (func_ret_sub == 0) {
977 o(0xc3); /* ret */
978 } else {
979 o(0xc2); /* ret n */
980 g(func_ret_sub);
981 g(func_ret_sub >> 8);
982 }
983
984 saved_ind = ind;
985 ind = func_sub_sp_offset - FUNC_PROLOG_SIZE;
986 /* align local size to word & save local variables */
987 v = (func_scratch + -loc + 15) & -16;
988
50b040ef grischka2009-12-19 22:40:28 +0100989 if (v >= 4096) {
990 Sym *sym = external_global_sym(TOK___chkstk, &func_old_type, 0);
991 oad(0xb8, v); /* mov stacksize, %eax */
992 oad(0xe8, -4); /* call __chkstk, (does the stackframe too) */
993 greloc(cur_text_section, sym, ind-4, R_X86_64_PC32);
994 o(0x90); /* fill for FUNC_PROLOG_SIZE = 11 bytes */
995 } else {
996 o(0xe5894855); /* push %rbp, mov %rsp, %rbp */
997 o(0xec8148); /* sub rsp, stacksize */
998 gen_le32(v);
999 }
df4c0892 grischka2011-07-14 19:09:49 +02001000
1001 cur_text_section->data_offset = saved_ind;
1002 pe_add_unwind_data(ind, saved_ind, v);
1003 ind = cur_text_section->data_offset;
50b040ef grischka2009-12-19 22:40:28 +01001004}
1005
45987579 grischka2009-07-18 22:05:49 +02001006#else
50b040ef grischka2009-12-19 22:40:28 +01001007
1008static void gadd_sp(int val)
1009{
1010 if (val == (char)val) {
1011 o(0xc48348);
1012 g(val);
1013 } else {
1014 oad(0xc48148, val); /* add $xxx, %rsp */
1015 }
1016}
1017
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001018typedef enum X86_64_Mode {
1019 x86_64_mode_none,
1020 x86_64_mode_memory,
1021 x86_64_mode_integer,
1022 x86_64_mode_sse,
1023 x86_64_mode_x87
1024} X86_64_Mode;
1025
3fe2a95d grischka2014-01-07 14:57:07 +01001026static X86_64_Mode classify_x86_64_merge(X86_64_Mode a, X86_64_Mode b)
1027{
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001028 if (a == b)
1029 return a;
1030 else if (a == x86_64_mode_none)
1031 return b;
1032 else if (b == x86_64_mode_none)
1033 return a;
1034 else if ((a == x86_64_mode_memory) || (b == x86_64_mode_memory))
1035 return x86_64_mode_memory;
1036 else if ((a == x86_64_mode_integer) || (b == x86_64_mode_integer))
1037 return x86_64_mode_integer;
1038 else if ((a == x86_64_mode_x87) || (b == x86_64_mode_x87))
1039 return x86_64_mode_memory;
1040 else
1041 return x86_64_mode_sse;
1042}
1043
3fe2a95d grischka2014-01-07 14:57:07 +01001044static X86_64_Mode classify_x86_64_inner(CType *ty)
1045{
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001046 X86_64_Mode mode;
1047 Sym *f;
1048
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001049 switch (ty->t & VT_BTYPE) {
1050 case VT_VOID: return x86_64_mode_none;
1051
1052 case VT_INT:
1053 case VT_BYTE:
1054 case VT_SHORT:
1055 case VT_LLONG:
1056 case VT_BOOL:
1057 case VT_PTR:
0e17671f James Lyon2013-04-19 15:33:16 +01001058 case VT_FUNC:
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001059 case VT_ENUM: return x86_64_mode_integer;
1060
1061 case VT_FLOAT:
1062 case VT_DOUBLE: return x86_64_mode_sse;
1063
1064 case VT_LDOUBLE: return x86_64_mode_x87;
1065
1066 case VT_STRUCT:
1067 f = ty->ref;
1068
55ea6d3f James Lyon2013-04-19 00:40:48 +01001069 mode = x86_64_mode_none;
8d44851d Philip2015-04-25 19:17:37 +00001070 for (f = f->next; f; f = f->next)
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001071 mode = classify_x86_64_merge(mode, classify_x86_64_inner(&f->type));
1072
1073 return mode;
1074 }
0e17671f
JL
James Lyon2013-04-19 15:33:16 +01001075
1076 assert(0);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001077}
1078
3fe2a95d grischka2014-01-07 14:57:07 +01001079static X86_64_Mode classify_x86_64_arg(CType *ty, CType *ret, int *psize, int *palign, int *reg_count)
1080{
55ea6d3f James Lyon2013-04-19 00:40:48 +01001081 X86_64_Mode mode;
0f5942c6 Thomas Preud'homme2013-09-24 15:36:04 +02001082 int size, align, ret_t = 0;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001083
b961ba53 James Lyon2013-04-19 11:08:12 +01001084 if (ty->t & (VT_BITFIELD|VT_ARRAY)) {
55ea6d3f James Lyon2013-04-19 00:40:48 +01001085 *psize = 8;
59b8007f Thomas Preud'homme2014-01-03 08:41:34 +08001086 *palign = 8;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001087 *reg_count = 1;
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001088 ret_t = ty->t;
1089 mode = x86_64_mode_integer;
1090 } else {
1091 size = type_size(ty, &align);
1092 *psize = (size + 7) & ~7;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001093 *palign = (align + 7) & ~7;
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001094
1095 if (size > 16) {
1096 mode = x86_64_mode_memory;
1097 } else {
1098 mode = classify_x86_64_inner(ty);
1099 switch (mode) {
1100 case x86_64_mode_integer:
1101 if (size > 8) {
1102 *reg_count = 2;
1103 ret_t = VT_QLONG;
1104 } else {
1105 *reg_count = 1;
1106 ret_t = (size > 4) ? VT_LLONG : VT_INT;
1107 }
1108 break;
1109
1110 case x86_64_mode_x87:
1111 *reg_count = 1;
1112 ret_t = VT_LDOUBLE;
1113 break;
1114
1115 case x86_64_mode_sse:
1116 if (size > 8) {
1117 *reg_count = 2;
1118 ret_t = VT_QFLOAT;
1119 } else {
1120 *reg_count = 1;
1121 ret_t = (size > 4) ? VT_DOUBLE : VT_FLOAT;
1122 }
1123 break;
385a86b0 Thomas Preud'homme2013-10-01 17:10:18 +02001124 default: break; /* nothing to be done for x86_64_mode_memory and x86_64_mode_none*/
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001125 }
1126 }
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001127 }
1128
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001129 if (ret) {
1130 ret->ref = NULL;
1131 ret->t = ret_t;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001132 }
b961ba53 James Lyon2013-04-19 11:08:12 +01001133
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001134 return mode;
1135}
1136
3fe2a95d grischka2014-01-07 14:57:07 +01001137ST_FUNC int classify_x86_64_va_arg(CType *ty)
1138{
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001139 /* This definition must be synced with stdarg.h */
1140 enum __va_arg_type {
1141 __va_gen_reg, __va_float_reg, __va_stack
1142 };
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001143 int size, align, reg_count;
1144 X86_64_Mode mode = classify_x86_64_arg(ty, NULL, &size, &align, &reg_count);
55ea6d3f James Lyon2013-04-19 00:40:48 +01001145 switch (mode) {
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001146 default: return __va_stack;
1147 case x86_64_mode_integer: return __va_gen_reg;
1148 case x86_64_mode_sse: return __va_float_reg;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001149 }
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001150}
1151
dcec8673
TP
Thomas Preud'homme2013-11-22 09:27:15 +08001152/* Return the number of registers needed to return the struct, or 0 if
1153 returning via struct pointer. */
50899e30 Michael Matz2015-03-09 00:19:59 +01001154ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret, int *ret_align, int *regsize)
3fe2a95d grischka2014-01-07 14:57:07 +01001155{
6ee366e7 James Lyon2013-04-26 16:42:12 +01001156 int size, align, reg_count;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001157 *ret_align = 1; // Never have to re-align return values for x86-64
50899e30 Michael Matz2015-03-09 00:19:59 +01001158 *regsize = 8;
dcec8673 Thomas Preud'homme2013-11-22 09:27:15 +08001159 return (classify_x86_64_arg(vt, ret, &size, &align, &reg_count) != x86_64_mode_memory);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001160}
1161
45987579 grischka2009-07-18 22:05:49 +02001162#define REGN 6
c998985c grischka2009-07-18 22:07:42 +02001163static const uint8_t arg_regs[REGN] = {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001164 TREG_RDI, TREG_RSI, TREG_RDX, TREG_RCX, TREG_R8, TREG_R9
1165};
45987579 grischka2009-07-18 22:05:49 +02001166
0e17671f
JL
James Lyon2013-04-19 15:33:16 +01001167static int arg_prepare_reg(int idx) {
1168 if (idx == 2 || idx == 3)
1169 /* idx=2: r10, idx=3: r11 */
1170 return idx + 8;
1171 else
1172 return arg_regs[idx];
1173}
1174
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001175/* Generate function call. The function address is pushed first, then
1176 all the parameters in call order. This functions pops all the
1177 parameters and the function address. */
1178void gfunc_call(int nb_args)
1179{
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001180 X86_64_Mode mode;
1181 CType type;
0f5942c6 Thomas Preud'homme2013-09-24 15:36:04 +02001182 int size, align, r, args_size, stack_adjust, run_start, run_end, i, reg_count;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001183 int nb_reg_args = 0;
1184 int nb_sse_args = 0;
1185 int sse_reg, gen_reg;
1186
6ee366e7 James Lyon2013-04-26 16:42:12 +01001187 /* calculate the number of integer/float register arguments */
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001188 for(i = 0; i < nb_args; i++) {
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001189 mode = classify_x86_64_arg(&vtop[-i].type, NULL, &size, &align, &reg_count);
1190 if (mode == x86_64_mode_sse)
55ea6d3f James Lyon2013-04-19 00:40:48 +01001191 nb_sse_args += reg_count;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001192 else if (mode == x86_64_mode_integer)
55ea6d3f James Lyon2013-04-19 00:40:48 +01001193 nb_reg_args += reg_count;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001194 }
1195
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001196 /* arguments are collected in runs. Each run is a collection of 8-byte aligned arguments
1197 and ended by a 16-byte aligned argument. This is because, from the point of view of
1198 the callee, argument alignment is computed from the bottom up. */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001199 /* for struct arguments, we need to call memcpy and the function
1200 call breaks register passing arguments we are preparing.
1201 So, we process arguments which will be passed by stack first. */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001202 gen_reg = nb_reg_args;
1203 sse_reg = nb_sse_args;
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001204 run_start = 0;
1205 args_size = 0;
1206 while (run_start != nb_args) {
1207 int run_gen_reg = gen_reg, run_sse_reg = sse_reg;
cbce6d2b James Lyon2013-04-19 22:05:49 +01001208
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001209 run_end = nb_args;
1210 stack_adjust = 0;
1211 for(i = run_start; (i < nb_args) && (run_end == nb_args); i++) {
1212 mode = classify_x86_64_arg(&vtop[-i].type, NULL, &size, &align, &reg_count);
1213 switch (mode) {
1214 case x86_64_mode_memory:
1215 case x86_64_mode_x87:
1216 stack_arg:
1217 if (align == 16)
1218 run_end = i;
cbce6d2b James Lyon2013-04-19 22:05:49 +01001219 else
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001220 stack_adjust += size;
1221 break;
1222
1223 case x86_64_mode_sse:
1224 sse_reg -= reg_count;
1225 if (sse_reg + reg_count > 8) goto stack_arg;
1226 break;
1227
1228 case x86_64_mode_integer:
1229 gen_reg -= reg_count;
1230 if (gen_reg + reg_count > REGN) goto stack_arg;
1231 break;
385a86b0 Thomas Preud'homme2013-10-01 17:10:18 +02001232 default: break; /* nothing to be done for x86_64_mode_none */
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001233 }
1234 }
1235
1236 gen_reg = run_gen_reg;
1237 sse_reg = run_sse_reg;
1238
1239 /* adjust stack to align SSE boundary */
1240 if (stack_adjust &= 15) {
1241 /* fetch cpu flag before the following sub will change the value */
1242 if (vtop >= vstack && (vtop->r & VT_VALMASK) == VT_CMP)
1243 gv(RC_INT);
1244
1245 stack_adjust = 16 - stack_adjust;
1246 o(0x48);
1247 oad(0xec81, stack_adjust); /* sub $xxx, %rsp */
1248 args_size += stack_adjust;
1249 }
1250
1251 for(i = run_start; i < run_end;) {
1252 /* Swap argument to top, it will possibly be changed here,
1253 and might use more temps. At the end of the loop we keep
1254 in on the stack and swap it back to its original position
1255 if it is a register. */
1256 SValue tmp = vtop[0];
1257 vtop[0] = vtop[-i];
1258 vtop[-i] = tmp;
1259
1260 mode = classify_x86_64_arg(&vtop->type, NULL, &size, &align, &reg_count);
1261
1262 int arg_stored = 1;
1263 switch (vtop->type.t & VT_BTYPE) {
1264 case VT_STRUCT:
1265 if (mode == x86_64_mode_sse) {
1266 if (sse_reg > 8)
1267 sse_reg -= reg_count;
1268 else
1269 arg_stored = 0;
1270 } else if (mode == x86_64_mode_integer) {
1271 if (gen_reg > REGN)
1272 gen_reg -= reg_count;
1273 else
1274 arg_stored = 0;
1275 }
1276
1277 if (arg_stored) {
1278 /* allocate the necessary size on stack */
1279 o(0x48);
1280 oad(0xec81, size); /* sub $xxx, %rsp */
1281 /* generate structure store */
1282 r = get_reg(RC_INT);
1283 orex(1, r, 0, 0x89); /* mov %rsp, r */
1284 o(0xe0 + REG_VALUE(r));
1285 vset(&vtop->type, r | VT_LVAL, 0);
1286 vswap();
1287 vstore();
1288 args_size += size;
1289 }
1290 break;
1291
1292 case VT_LDOUBLE:
1293 assert(0);
1294 break;
1295
1296 case VT_FLOAT:
1297 case VT_DOUBLE:
1298 assert(mode == x86_64_mode_sse);
1299 if (sse_reg > 8) {
1300 --sse_reg;
1301 r = gv(RC_FLOAT);
1302 o(0x50); /* push $rax */
1303 /* movq %xmmN, (%rsp) */
1304 o(0xd60f66);
1305 o(0x04 + REG_VALUE(r)*8);
1306 o(0x24);
1307 args_size += size;
1308 } else {
cbce6d2b James Lyon2013-04-19 22:05:49 +01001309 arg_stored = 0;
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001310 }
1311 break;
1312
1313 default:
1314 assert(mode == x86_64_mode_integer);
1315 /* simple type */
1316 /* XXX: implicit cast ? */
1317 if (gen_reg > REGN) {
1318 --gen_reg;
1319 r = gv(RC_INT);
1320 orex(0,r,0,0x50 + REG_VALUE(r)); /* push r */
1321 args_size += size;
1322 } else {
cbce6d2b James Lyon2013-04-19 22:05:49 +01001323 arg_stored = 0;
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001324 }
1325 break;
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001326 }
1327
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001328 /* And swap the argument back to it's original position. */
1329 tmp = vtop[0];
1330 vtop[0] = vtop[-i];
1331 vtop[-i] = tmp;
1332
cbce6d2b James Lyon2013-04-19 22:05:49 +01001333 if (arg_stored) {
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001334 vrotb(i+1);
1335 assert((vtop->type.t == tmp.type.t) && (vtop->r == tmp.r));
1336 vpop();
1337 --nb_args;
1338 --run_end;
1339 } else {
1340 ++i;
1341 }
1342 }
1343
1344 /* handle 16 byte aligned arguments at end of run */
1345 run_start = i = run_end;
1346 while (i < nb_args) {
1347 /* Rotate argument to top since it will always be popped */
1348 mode = classify_x86_64_arg(&vtop[-i].type, NULL, &size, &align, &reg_count);
1349 if (align != 16)
1350 break;
1351
1352 vrotb(i+1);
1353
1354 if ((vtop->type.t & VT_BTYPE) == VT_LDOUBLE) {
1355 gv(RC_ST0);
1356 oad(0xec8148, size); /* sub $xxx, %rsp */
1357 o(0x7cdb); /* fstpt 0(%rsp) */
1358 g(0x24);
1359 g(0x00);
1360 args_size += size;
1361 } else {
1362 assert(mode == x86_64_mode_memory);
1363
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001364 /* allocate the necessary size on stack */
1365 o(0x48);
1366 oad(0xec81, size); /* sub $xxx, %rsp */
1367 /* generate structure store */
1368 r = get_reg(RC_INT);
1369 orex(1, r, 0, 0x89); /* mov %rsp, r */
1370 o(0xe0 + REG_VALUE(r));
1371 vset(&vtop->type, r | VT_LVAL, 0);
1372 vswap();
1373 vstore();
1374 args_size += size;
1375 }
55ea6d3f James Lyon2013-04-19 00:40:48 +01001376
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001377 vpop();
1378 --nb_args;
cbce6d2b James Lyon2013-04-19 22:05:49 +01001379 }
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001380 }
6ee366e7 James Lyon2013-04-26 16:42:12 +01001381
86ac6b9b Michael Matz2012-04-15 05:12:43 +02001382 /* XXX This should be superfluous. */
b5486240 grischka2009-12-20 20:33:21 +01001383 save_regs(0); /* save used temporary registers */
070b86a8 grischka2009-12-20 02:19:51 +01001384
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001385 /* then, we prepare register passing arguments.
1386 Note that we cannot set RDX and RCX in this loop because gv()
1387 may break these temporary registers. Let's use R10 and R11
1388 instead of them */
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001389 assert(gen_reg <= REGN);
1390 assert(sse_reg <= 8);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001391 for(i = 0; i < nb_args; i++) {
6ee366e7 James Lyon2013-04-26 16:42:12 +01001392 mode = classify_x86_64_arg(&vtop->type, &type, &size, &align, &reg_count);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001393 /* Alter stack entry type so that gv() knows how to treat it */
1394 vtop->type = type;
cbce6d2b James Lyon2013-04-19 22:05:49 +01001395 if (mode == x86_64_mode_sse) {
5c35ba66
JL
James Lyon2013-04-24 02:19:15 +01001396 if (reg_count == 2) {
1397 sse_reg -= 2;
1398 gv(RC_FRET); /* Use pair load into xmm0 & xmm1 */
1399 if (sse_reg) { /* avoid redundant movaps %xmm0, %xmm0 */
1400 /* movaps %xmm0, %xmmN */
1401 o(0x280f);
1402 o(0xc0 + (sse_reg << 3));
1403 /* movaps %xmm1, %xmmN */
1404 o(0x280f);
1405 o(0xc1 + ((sse_reg+1) << 3));
1406 }
1407 } else {
1408 assert(reg_count == 1);
1409 --sse_reg;
1410 /* Load directly to register */
1411 gv(RC_XMM0 << sse_reg);
1412 }
cbce6d2b James Lyon2013-04-19 22:05:49 +01001413 } else if (mode == x86_64_mode_integer) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001414 /* simple type */
1415 /* XXX: implicit cast ? */
0e17671f James Lyon2013-04-19 15:33:16 +01001416 gen_reg -= reg_count;
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001417 r = gv(RC_INT);
1418 int d = arg_prepare_reg(gen_reg);
1419 orex(1,d,r,0x89); /* mov */
1420 o(0xc0 + REG_VALUE(r) * 8 + REG_VALUE(d));
1421 if (reg_count == 2) {
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001422 d = arg_prepare_reg(gen_reg+1);
1423 orex(1,d,vtop->r2,0x89); /* mov */
1424 o(0xc0 + REG_VALUE(vtop->r2) * 8 + REG_VALUE(d));
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001425 }
1426 }
1427 vtop--;
1428 }
cbce6d2b
JL
James Lyon2013-04-19 22:05:49 +01001429 assert(gen_reg == 0);
1430 assert(sse_reg == 0);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001431
86ac6b9b
MM
Michael Matz2012-04-15 05:12:43 +02001432 /* We shouldn't have many operands on the stack anymore, but the
1433 call address itself is still there, and it might be in %eax
1434 (or edx/ecx) currently, which the below writes would clobber.
1435 So evict all remaining operands here. */
1436 save_regs(0);
1437
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001438 /* Copy R10 and R11 into RDX and RCX, respectively */
1439 if (nb_reg_args > 2) {
1440 o(0xd2894c); /* mov %r10, %rdx */
1441 if (nb_reg_args > 3) {
1442 o(0xd9894c); /* mov %r11, %rcx */
1443 }
1444 }
1445
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001446 oad(0xb8, nb_sse_args < 8 ? nb_sse_args : 8); /* mov nb_sse_args, %eax */
1447 gcall_or_jmp(0);
1448 if (args_size)
1449 gadd_sp(args_size);
1450 vtop--;
1451}
1452
50b040ef grischka2009-12-19 22:40:28 +01001453
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001454#define FUNC_PROLOG_SIZE 11
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001455
1456static void push_arg_reg(int i) {
1457 loc -= 8;
1458 gen_modrm64(0x89, arg_regs[i], VT_LOCAL, NULL, loc);
1459}
1460
1461/* generate function prolog of type 't' */
1462void gfunc_prolog(CType *func_type)
1463{
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001464 X86_64_Mode mode;
1465 int i, addr, align, size, reg_count;
0f5942c6 Thomas Preud'homme2013-09-24 15:36:04 +02001466 int param_addr = 0, reg_param_index, sse_param_index;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001467 Sym *sym;
1468 CType *type;
1469
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001470 sym = func_type->ref;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001471 addr = PTR_SIZE * 2;
1472 loc = 0;
1473 ind += FUNC_PROLOG_SIZE;
1474 func_sub_sp_offset = ind;
50b040ef grischka2009-12-19 22:40:28 +01001475 func_ret_sub = 0;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001476
1477 if (func_type->ref->c == FUNC_ELLIPSIS) {
1478 int seen_reg_num, seen_sse_num, seen_stack_size;
1479 seen_reg_num = seen_sse_num = 0;
1480 /* frame pointer and return address */
1481 seen_stack_size = PTR_SIZE * 2;
1482 /* count the number of seen parameters */
1483 sym = func_type->ref;
1484 while ((sym = sym->next) != NULL) {
1485 type = &sym->type;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001486 mode = classify_x86_64_arg(type, NULL, &size, &align, &reg_count);
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001487 switch (mode) {
1488 default:
6ee366e7
JL
James Lyon2013-04-26 16:42:12 +01001489 stack_arg:
1490 seen_stack_size = ((seen_stack_size + align - 1) & -align) + size;
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001491 break;
1492
1493 case x86_64_mode_integer:
1494 if (seen_reg_num + reg_count <= 8) {
1495 seen_reg_num += reg_count;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001496 } else {
b961ba53 James Lyon2013-04-19 11:08:12 +01001497 seen_reg_num = 8;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001498 goto stack_arg;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001499 }
b961ba53
JL
James Lyon2013-04-19 11:08:12 +01001500 break;
1501
1502 case x86_64_mode_sse:
1503 if (seen_sse_num + reg_count <= 8) {
1504 seen_sse_num += reg_count;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001505 } else {
b961ba53 James Lyon2013-04-19 11:08:12 +01001506 seen_sse_num = 8;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001507 goto stack_arg;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001508 }
b961ba53 James Lyon2013-04-19 11:08:12 +01001509 break;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001510 }
1511 }
1512
1513 loc -= 16;
1514 /* movl $0x????????, -0x10(%rbp) */
1515 o(0xf045c7);
1516 gen_le32(seen_reg_num * 8);
1517 /* movl $0x????????, -0xc(%rbp) */
1518 o(0xf445c7);
1519 gen_le32(seen_sse_num * 16 + 48);
1520 /* movl $0x????????, -0x8(%rbp) */
1521 o(0xf845c7);
1522 gen_le32(seen_stack_size);
1523
1524 /* save all register passing arguments */
1525 for (i = 0; i < 8; i++) {
1526 loc -= 16;
1527 o(0xd60f66); /* movq */
1528 gen_modrm(7 - i, VT_LOCAL, NULL, loc);
1529 /* movq $0, loc+8(%rbp) */
1530 o(0x85c748);
1531 gen_le32(loc + 8);
1532 gen_le32(0);
1533 }
45987579 grischka2009-07-18 22:05:49 +02001534 for (i = 0; i < REGN; i++) {
1535 push_arg_reg(REGN-1-i);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001536 }
1537 }
1538
1539 sym = func_type->ref;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001540 reg_param_index = 0;
1541 sse_param_index = 0;
1542
1543 /* if the function returns a structure, then add an
1544 implicit pointer parameter */
1545 func_vt = sym->type;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001546 mode = classify_x86_64_arg(&func_vt, NULL, &size, &align, &reg_count);
55ea6d3f James Lyon2013-04-19 00:40:48 +01001547 if (mode == x86_64_mode_memory) {
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001548 push_arg_reg(reg_param_index);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001549 func_vc = loc;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001550 reg_param_index++;
1551 }
1552 /* define parameters */
1553 while ((sym = sym->next) != NULL) {
1554 type = &sym->type;
6ee366e7 James Lyon2013-04-26 16:42:12 +01001555 mode = classify_x86_64_arg(type, NULL, &size, &align, &reg_count);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001556 switch (mode) {
1557 case x86_64_mode_sse:
1558 if (sse_param_index + reg_count <= 8) {
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001559 /* save arguments passed by register */
0e17671f
JL
James Lyon2013-04-19 15:33:16 +01001560 loc -= reg_count * 8;
1561 param_addr = loc;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001562 for (i = 0; i < reg_count; ++i) {
55ea6d3f James Lyon2013-04-19 00:40:48 +01001563 o(0xd60f66); /* movq */
0e17671f James Lyon2013-04-19 15:33:16 +01001564 gen_modrm(sse_param_index, VT_LOCAL, NULL, param_addr + i*8);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001565 ++sse_param_index;
1566 }
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001567 } else {
6ee366e7 James Lyon2013-04-26 16:42:12 +01001568 addr = (addr + align - 1) & -align;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001569 param_addr = addr;
1570 addr += size;
1571 }
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001572 break;
1573
1574 case x86_64_mode_memory:
1575 case x86_64_mode_x87:
6ee366e7 James Lyon2013-04-26 16:42:12 +01001576 addr = (addr + align - 1) & -align;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001577 param_addr = addr;
1578 addr += size;
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001579 break;
1580
1581 case x86_64_mode_integer: {
1582 if (reg_param_index + reg_count <= REGN) {
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001583 /* save arguments passed by register */
0e17671f
JL
James Lyon2013-04-19 15:33:16 +01001584 loc -= reg_count * 8;
1585 param_addr = loc;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001586 for (i = 0; i < reg_count; ++i) {
0e17671f James Lyon2013-04-19 15:33:16 +01001587 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, param_addr + i*8);
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001588 ++reg_param_index;
1589 }
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001590 } else {
6ee366e7 James Lyon2013-04-26 16:42:12 +01001591 addr = (addr + align - 1) & -align;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001592 param_addr = addr;
55ea6d3f James Lyon2013-04-19 00:40:48 +01001593 addr += size;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001594 }
55ea6d3f
JL
James Lyon2013-04-19 00:40:48 +01001595 break;
1596 }
385a86b0 Thomas Preud'homme2013-10-01 17:10:18 +02001597 default: break; /* nothing to be done for x86_64_mode_none */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001598 }
1599 sym_push(sym->v & ~SYM_FIELD, type,
1600 VT_LOCAL | VT_LVAL, param_addr);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001601 }
559675b9 seyko2015-04-10 15:17:22 +03001602
1603#ifdef CONFIG_TCC_BCHECK
1604 /* leave some room for bound checking code */
1605 if (tcc_state->do_bounds_check) {
1606 func_bound_offset = lbounds_section->data_offset;
1607 func_bound_ind = ind;
1608 oad(0xb8, 0); /* lbound section pointer */
1609 o(0xc78948); /* mov %rax,%rdi ## first arg in %rdi, this must be ptr */
1610 oad(0xb8, 0); /* call to function */
1611 }
1612#endif
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001613}
1614
1615/* generate function epilog */
1616void gfunc_epilog(void)
1617{
1618 int v, saved_ind;
1619
559675b9 seyko2015-04-10 15:17:22 +03001620#ifdef CONFIG_TCC_BCHECK
1621 if (tcc_state->do_bounds_check
1622 && func_bound_offset != lbounds_section->data_offset)
1623 {
1624 addr_t saved_ind;
1625 addr_t *bounds_ptr;
1626 Sym *sym_data;
1627
1628 /* add end of table info */
1629 bounds_ptr = section_ptr_add(lbounds_section, sizeof(addr_t));
1630 *bounds_ptr = 0;
1631
1632 /* generate bound local allocation */
1633 sym_data = get_sym_ref(&char_pointer_type, lbounds_section,
1634 func_bound_offset, lbounds_section->data_offset);
1635 saved_ind = ind;
1636 ind = func_bound_ind;
1637 greloc(cur_text_section, sym_data, ind + 1, R_386_32);
1638 ind = ind + 5 + 3;
1639 gen_static_call(TOK___bound_local_new);
1640 ind = saved_ind;
1641
1642 /* generate bound check local freeing */
1643 o(0x5250); /* save returned value, if any */
1644 greloc(cur_text_section, sym_data, ind + 1, R_386_32);
1645 oad(0xb8, 0); /* mov xxx, %rax */
1646 o(0xc78948); /* mov %rax,%rdi ## first arg in %rdi, this must be ptr */
1647 gen_static_call(TOK___bound_local_delete);
1648 o(0x585a); /* restore returned value, if any */
1649 }
1650#endif
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001651 o(0xc9); /* leave */
1652 if (func_ret_sub == 0) {
1653 o(0xc3); /* ret */
1654 } else {
1655 o(0xc2); /* ret n */
1656 g(func_ret_sub);
1657 g(func_ret_sub >> 8);
1658 }
1659 /* align local size to word & save local variables */
1660 v = (-loc + 15) & -16;
1661 saved_ind = ind;
1662 ind = func_sub_sp_offset - FUNC_PROLOG_SIZE;
50b040ef grischka2009-12-19 22:40:28 +01001663 o(0xe5894855); /* push %rbp, mov %rsp, %rbp */
1664 o(0xec8148); /* sub rsp, stacksize */
1665 gen_le32(v);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001666 ind = saved_ind;
1667}
1668
50b040ef grischka2009-12-19 22:40:28 +01001669#endif /* not PE */
1670
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001671/* generate a jump to a label */
1672int gjmp(int t)
1673{
1674 return psym(0xe9, t);
1675}
1676
1677/* generate a jump to a fixed address */
1678void gjmp_addr(int a)
1679{
1680 int r;
1681 r = a - ind - 2;
1682 if (r == (char)r) {
1683 g(0xeb);
1684 g(r);
1685 } else {
1686 oad(0xe9, a - ind - 5);
1687 }
1688}
1689
1690/* generate a test. set 'inv' to invert test. Stack entry is popped */
1691int gtst(int inv, int t)
1692{
1693 int v, *p;
1694
1695 v = vtop->r & VT_VALMASK;
1696 if (v == VT_CMP) {
1697 /* fast case : can jump directly since flags are set */
2daae0dc
MM
Michael Matz2012-05-13 02:21:51 +02001698 if (vtop->c.i & 0x100)
1699 {
1700 /* This was a float compare. If the parity flag is set
1701 the result was unordered. For anything except != this
1702 means false and we don't jump (anding both conditions).
1703 For != this means true (oring both).
1704 Take care about inverting the test. We need to jump
1705 to our target if the result was unordered and test wasn't NE,
1706 otherwise if unordered we don't want to jump. */
1707 vtop->c.i &= ~0x100;
1708 if (!inv == (vtop->c.i != TOK_NE))
1709 o(0x067a); /* jp +6 */
1710 else
1711 {
1712 g(0x0f);
1713 t = psym(0x8a, t); /* jp t */
1714 }
1715 }
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001716 g(0x0f);
1717 t = psym((vtop->c.i - 16) ^ inv, t);
2437ccdc seyko2015-03-03 15:51:09 +03001718 } else if (v == VT_JMP || v == VT_JMPI) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001719 /* && or || optimization */
1720 if ((v & 1) == inv) {
1721 /* insert vtop->c jump list in t */
1722 p = &vtop->c.i;
1723 while (*p != 0)
1724 p = (int *)(cur_text_section->data + *p);
1725 *p = t;
1726 t = vtop->c.i;
1727 } else {
1728 t = gjmp(t);
1729 gsym(vtop->c.i);
1730 }
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001731 }
1732 vtop--;
1733 return t;
1734}
1735
1736/* generate an integer binary operation */
1737void gen_opi(int op)
1738{
1739 int r, fr, opc, c;
070b86a8 grischka2009-12-20 02:19:51 +01001740 int ll, uu, cc;
1741
1742 ll = is64_type(vtop[-1].type.t);
1743 uu = (vtop[-1].type.t & VT_UNSIGNED) != 0;
1744 cc = (vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001745
1746 switch(op) {
1747 case '+':
1748 case TOK_ADDC1: /* add with carry generation */
1749 opc = 0;
1750 gen_op8:
070b86a8 grischka2009-12-20 02:19:51 +01001751 if (cc && (!ll || (int)vtop->c.ll == vtop->c.ll)) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001752 /* constant case */
1753 vswap();
1754 r = gv(RC_INT);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001755 vswap();
1756 c = vtop->c.i;
1757 if (c == (char)c) {
1758 /* XXX: generate inc and dec for smaller code ? */
070b86a8 grischka2009-12-20 02:19:51 +01001759 orex(ll, r, 0, 0x83);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001760 o(0xc0 | (opc << 3) | REG_VALUE(r));
1761 g(c);
1762 } else {
070b86a8 grischka2009-12-20 02:19:51 +01001763 orex(ll, r, 0, 0x81);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001764 oad(0xc0 | (opc << 3) | REG_VALUE(r), c);
1765 }
1766 } else {
1767 gv2(RC_INT, RC_INT);
1768 r = vtop[-1].r;
1769 fr = vtop[0].r;
070b86a8 grischka2009-12-20 02:19:51 +01001770 orex(ll, r, fr, (opc << 3) | 0x01);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001771 o(0xc0 + REG_VALUE(r) + REG_VALUE(fr) * 8);
1772 }
1773 vtop--;
1774 if (op >= TOK_ULT && op <= TOK_GT) {
1775 vtop->r = VT_CMP;
1776 vtop->c.i = op;
1777 }
1778 break;
1779 case '-':
1780 case TOK_SUBC1: /* sub with carry generation */
1781 opc = 5;
1782 goto gen_op8;
1783 case TOK_ADDC2: /* add with carry use */
1784 opc = 2;
1785 goto gen_op8;
1786 case TOK_SUBC2: /* sub with carry use */
1787 opc = 3;
1788 goto gen_op8;
1789 case '&':
1790 opc = 4;
1791 goto gen_op8;
1792 case '^':
1793 opc = 6;
1794 goto gen_op8;
1795 case '|':
1796 opc = 1;
1797 goto gen_op8;
1798 case '*':
1799 gv2(RC_INT, RC_INT);
1800 r = vtop[-1].r;
1801 fr = vtop[0].r;
070b86a8 grischka2009-12-20 02:19:51 +01001802 orex(ll, fr, r, 0xaf0f); /* imul fr, r */
1803 o(0xc0 + REG_VALUE(fr) + REG_VALUE(r) * 8);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001804 vtop--;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001805 break;
1806 case TOK_SHL:
1807 opc = 4;
1808 goto gen_shift;
1809 case TOK_SHR:
1810 opc = 5;
1811 goto gen_shift;
1812 case TOK_SAR:
1813 opc = 7;
1814 gen_shift:
1815 opc = 0xc0 | (opc << 3);
070b86a8 grischka2009-12-20 02:19:51 +01001816 if (cc) {
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001817 /* constant case */
1818 vswap();
1819 r = gv(RC_INT);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001820 vswap();
070b86a8 grischka2009-12-20 02:19:51 +01001821 orex(ll, r, 0, 0xc1); /* shl/shr/sar $xxx, r */
1822 o(opc | REG_VALUE(r));
1823 g(vtop->c.i & (ll ? 63 : 31));
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001824 } else {
1825 /* we generate the shift in ecx */
1826 gv2(RC_INT, RC_RCX);
1827 r = vtop[-1].r;
070b86a8 grischka2009-12-20 02:19:51 +01001828 orex(ll, r, 0, 0xd3); /* shl/shr/sar %cl, r */
1829 o(opc | REG_VALUE(r));
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001830 }
1831 vtop--;
1832 break;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001833 case TOK_UDIV:
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001834 case TOK_UMOD:
070b86a8 grischka2009-12-20 02:19:51 +01001835 uu = 1;
1836 goto divmod;
1837 case '/':
1838 case '%':
1839 case TOK_PDIV:
1840 uu = 0;
1841 divmod:
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001842 /* first operand must be in eax */
1843 /* XXX: need better constraint for second operand */
1844 gv2(RC_RAX, RC_RCX);
1845 r = vtop[-1].r;
1846 fr = vtop[0].r;
1847 vtop--;
1848 save_reg(TREG_RDX);
070b86a8 grischka2009-12-20 02:19:51 +01001849 orex(ll, 0, 0, uu ? 0xd231 : 0x99); /* xor %edx,%edx : cqto */
1850 orex(ll, fr, 0, 0xf7); /* div fr, %eax */
1851 o((uu ? 0xf0 : 0xf8) + REG_VALUE(fr));
1852 if (op == '%' || op == TOK_UMOD)
1853 r = TREG_RDX;
1854 else
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09001855 r = TREG_RAX;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001856 vtop->r = r;
1857 break;
1858 default:
1859 opc = 7;
1860 goto gen_op8;
1861 }
1862}
1863
1864void gen_opl(int op)
1865{
1866 gen_opi(op);
1867}
1868
1869/* generate a floating point operation 'v = t1 op t2' instruction. The
1870 two operands are guaranted to have the same floating point type */
946afd23 James Lyon2013-04-19 18:31:24 +01001871/* XXX: need to use ST1 too */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001872void gen_opf(int op)
1873{
1874 int a, ft, fc, swapped, r;
1875 int float_type =
946afd23 James Lyon2013-04-19 18:31:24 +01001876 (vtop->type.t & VT_BTYPE) == VT_LDOUBLE ? RC_ST0 : RC_FLOAT;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001877
1878 /* convert constants to memory references */
1879 if ((vtop[-1].r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
1880 vswap();
1881 gv(float_type);
1882 vswap();
1883 }
1884 if ((vtop[0].r & (VT_VALMASK | VT_LVAL)) == VT_CONST)
1885 gv(float_type);
1886
1887 /* must put at least one value in the floating point register */
1888 if ((vtop[-1].r & VT_LVAL) &&
1889 (vtop[0].r & VT_LVAL)) {
1890 vswap();
1891 gv(float_type);
1892 vswap();
1893 }
1894 swapped = 0;
1895 /* swap the stack if needed so that t1 is the register and t2 is
1896 the memory reference */
1897 if (vtop[-1].r & VT_LVAL) {
1898 vswap();
1899 swapped = 1;
1900 }
1901 if ((vtop->type.t & VT_BTYPE) == VT_LDOUBLE) {
1902 if (op >= TOK_ULT && op <= TOK_GT) {
1903 /* load on stack second operand */
1904 load(TREG_ST0, vtop);
1905 save_reg(TREG_RAX); /* eax is used by FP comparison code */
1906 if (op == TOK_GE || op == TOK_GT)
1907 swapped = !swapped;
1908 else if (op == TOK_EQ || op == TOK_NE)
1909 swapped = 0;
1910 if (swapped)
1911 o(0xc9d9); /* fxch %st(1) */
e0e9a2a2
TP
Thomas Preud'homme2013-12-31 23:40:21 +08001912 if (op == TOK_EQ || op == TOK_NE)
1913 o(0xe9da); /* fucompp */
1914 else
1915 o(0xd9de); /* fcompp */
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001916 o(0xe0df); /* fnstsw %ax */
1917 if (op == TOK_EQ) {
1918 o(0x45e480); /* and $0x45, %ah */
1919 o(0x40fC80); /* cmp $0x40, %ah */
1920 } else if (op == TOK_NE) {
1921 o(0x45e480); /* and $0x45, %ah */
1922 o(0x40f480); /* xor $0x40, %ah */
1923 op = TOK_NE;
1924 } else if (op == TOK_GE || op == TOK_LE) {
1925 o(0x05c4f6); /* test $0x05, %ah */
1926 op = TOK_EQ;
1927 } else {
1928 o(0x45c4f6); /* test $0x45, %ah */
1929 op = TOK_EQ;
1930 }
1931 vtop--;
1932 vtop->r = VT_CMP;
1933 vtop->c.i = op;
1934 } else {
1935 /* no memory reference possible for long double operations */
1936 load(TREG_ST0, vtop);
1937 swapped = !swapped;
1938
1939 switch(op) {
1940 default:
1941 case '+':
1942 a = 0;
1943 break;
1944 case '-':
1945 a = 4;
1946 if (swapped)
1947 a++;
1948 break;
1949 case '*':
1950 a = 1;
1951 break;
1952 case '/':
1953 a = 6;
1954 if (swapped)
1955 a++;
1956 break;
1957 }
1958 ft = vtop->type.t;
1959 fc = vtop->c.ul;
1960 o(0xde); /* fxxxp %st, %st(1) */
1961 o(0xc1 + (a << 3));
1962 vtop--;
1963 }
1964 } else {
1965 if (op >= TOK_ULT && op <= TOK_GT) {
1966 /* if saved lvalue, then we must reload it */
1967 r = vtop->r;
1968 fc = vtop->c.ul;
1969 if ((r & VT_VALMASK) == VT_LLOCAL) {
1970 SValue v1;
1971 r = get_reg(RC_INT);
a42b0291 Michael Matz2012-06-10 09:01:13 +02001972 v1.type.t = VT_PTR;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09001973 v1.r = VT_LOCAL | VT_LVAL;
1974 v1.c.ul = fc;
1975 load(r, &v1);
1976 fc = 0;
1977 }
1978
1979 if (op == TOK_EQ || op == TOK_NE) {
1980 swapped = 0;
1981 } else {
1982 if (op == TOK_LE || op == TOK_LT)
1983 swapped = !swapped;
1984 if (op == TOK_LE || op == TOK_GE) {
1985 op = 0x93; /* setae */
1986 } else {
1987 op = 0x97; /* seta */
1988 }
1989 }
1990
1991 if (swapped) {
946afd23
JL
James Lyon2013-04-19 18:31:24 +01001992 gv(RC_FLOAT);
1993 vswap();
1994 }
1995 assert(!(vtop[-1].r & VT_LVAL));
1996
1997 if ((vtop->type.t & VT_BTYPE) == VT_DOUBLE)
1998 o(0x66);
e0e9a2a2
TP
Thomas Preud'homme2013-12-31 23:40:21 +08001999 if (op == TOK_EQ || op == TOK_NE)
2000 o(0x2e0f); /* ucomisd */
2001 else
2002 o(0x2f0f); /* comisd */
2003
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002004 if (vtop->r & VT_LVAL) {
2005 gen_modrm(vtop[-1].r, r, vtop->sym, fc);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002006 } else {
946afd23 James Lyon2013-04-19 18:31:24 +01002007 o(0xc0 + REG_VALUE(vtop[0].r) + REG_VALUE(vtop[-1].r)*8);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002008 }
2009
2010 vtop--;
2011 vtop->r = VT_CMP;
2daae0dc Michael Matz2012-05-13 02:21:51 +02002012 vtop->c.i = op | 0x100;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002013 } else {
946afd23 James Lyon2013-04-19 18:31:24 +01002014 assert((vtop->type.t & VT_BTYPE) != VT_LDOUBLE);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002015 switch(op) {
2016 default:
2017 case '+':
2018 a = 0;
2019 break;
2020 case '-':
2021 a = 4;
2022 break;
2023 case '*':
2024 a = 1;
2025 break;
2026 case '/':
2027 a = 6;
2028 break;
2029 }
2030 ft = vtop->type.t;
2031 fc = vtop->c.ul;
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002032 assert((ft & VT_BTYPE) != VT_LDOUBLE);
2033
2034 r = vtop->r;
2035 /* if saved lvalue, then we must reload it */
2036 if ((vtop->r & VT_VALMASK) == VT_LLOCAL) {
2037 SValue v1;
2038 r = get_reg(RC_INT);
2039 v1.type.t = VT_PTR;
2040 v1.r = VT_LOCAL | VT_LVAL;
2041 v1.c.ul = fc;
2042 load(r, &v1);
2043 fc = 0;
2044 }
2045
2046 assert(!(vtop[-1].r & VT_LVAL));
2047 if (swapped) {
2048 assert(vtop->r & VT_LVAL);
2049 gv(RC_FLOAT);
2050 vswap();
2051 }
2052
2053 if ((ft & VT_BTYPE) == VT_DOUBLE) {
2054 o(0xf2);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002055 } else {
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002056 o(0xf3);
2057 }
2058 o(0x0f);
2059 o(0x58 + a);
2060
2061 if (vtop->r & VT_LVAL) {
2062 gen_modrm(vtop[-1].r, r, vtop->sym, fc);
2063 } else {
2064 o(0xc0 + REG_VALUE(vtop[0].r) + REG_VALUE(vtop[-1].r)*8);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002065 }
946afd23 James Lyon2013-04-19 18:31:24 +01002066
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002067 vtop--;
2068 }
2069 }
2070}
2071
2072/* convert integers to fp 't' type. Must handle 'int', 'unsigned int'
2073 and 'long long' cases. */
2074void gen_cvt_itof(int t)
2075{
2076 if ((t & VT_BTYPE) == VT_LDOUBLE) {
2077 save_reg(TREG_ST0);
2078 gv(RC_INT);
2079 if ((vtop->type.t & VT_BTYPE) == VT_LLONG) {
2080 /* signed long long to float/double/long double (unsigned case
2081 is handled generically) */
2082 o(0x50 + (vtop->r & VT_VALMASK)); /* push r */
2083 o(0x242cdf); /* fildll (%rsp) */
2084 o(0x08c48348); /* add $8, %rsp */
2085 } else if ((vtop->type.t & (VT_BTYPE | VT_UNSIGNED)) ==
2086 (VT_INT | VT_UNSIGNED)) {
2087 /* unsigned int to float/double/long double */
2088 o(0x6a); /* push $0 */
2089 g(0x00);
2090 o(0x50 + (vtop->r & VT_VALMASK)); /* push r */
2091 o(0x242cdf); /* fildll (%rsp) */
2092 o(0x10c48348); /* add $16, %rsp */
2093 } else {
2094 /* int to float/double/long double */
2095 o(0x50 + (vtop->r & VT_VALMASK)); /* push r */
2096 o(0x2404db); /* fildl (%rsp) */
2097 o(0x08c48348); /* add $8, %rsp */
2098 }
2099 vtop->r = TREG_ST0;
2100 } else {
946afd23 James Lyon2013-04-19 18:31:24 +01002101 int r = get_reg(RC_FLOAT);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002102 gv(RC_INT);
946afd23 James Lyon2013-04-19 18:31:24 +01002103 o(0xf2 + ((t & VT_BTYPE) == VT_FLOAT?1:0));
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002104 if ((vtop->type.t & (VT_BTYPE | VT_UNSIGNED)) ==
2105 (VT_INT | VT_UNSIGNED) ||
2106 (vtop->type.t & VT_BTYPE) == VT_LLONG) {
2107 o(0x48); /* REX */
2108 }
2109 o(0x2a0f);
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002110 o(0xc0 + (vtop->r & VT_VALMASK) + REG_VALUE(r)*8); /* cvtsi2sd */
2111 vtop->r = r;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002112 }
2113}
2114
2115/* convert from one floating point type to another */
2116void gen_cvt_ftof(int t)
2117{
2118 int ft, bt, tbt;
2119
2120 ft = vtop->type.t;
2121 bt = ft & VT_BTYPE;
2122 tbt = t & VT_BTYPE;
0e17671f James Lyon2013-04-19 15:33:16 +01002123
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002124 if (bt == VT_FLOAT) {
946afd23 James Lyon2013-04-19 18:31:24 +01002125 gv(RC_FLOAT);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002126 if (tbt == VT_DOUBLE) {
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002127 o(0x140f); /* unpcklps */
2128 o(0xc0 + REG_VALUE(vtop->r)*9);
2129 o(0x5a0f); /* cvtps2pd */
2130 o(0xc0 + REG_VALUE(vtop->r)*9);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002131 } else if (tbt == VT_LDOUBLE) {
946afd23 James Lyon2013-04-19 18:31:24 +01002132 save_reg(RC_ST0);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002133 /* movss %xmm0,-0x10(%rsp) */
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002134 o(0x110ff3);
2135 o(0x44 + REG_VALUE(vtop->r)*8);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002136 o(0xf024);
2137 o(0xf02444d9); /* flds -0x10(%rsp) */
2138 vtop->r = TREG_ST0;
2139 }
2140 } else if (bt == VT_DOUBLE) {
946afd23 James Lyon2013-04-19 18:31:24 +01002141 gv(RC_FLOAT);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002142 if (tbt == VT_FLOAT) {
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002143 o(0x140f66); /* unpcklpd */
2144 o(0xc0 + REG_VALUE(vtop->r)*9);
2145 o(0x5a0f66); /* cvtpd2ps */
2146 o(0xc0 + REG_VALUE(vtop->r)*9);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002147 } else if (tbt == VT_LDOUBLE) {
946afd23 James Lyon2013-04-19 18:31:24 +01002148 save_reg(RC_ST0);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002149 /* movsd %xmm0,-0x10(%rsp) */
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002150 o(0x110ff2);
2151 o(0x44 + REG_VALUE(vtop->r)*8);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002152 o(0xf024);
2153 o(0xf02444dd); /* fldl -0x10(%rsp) */
2154 vtop->r = TREG_ST0;
2155 }
2156 } else {
be1b6ba7 grischka2013-04-30 00:33:34 +02002157 int r;
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002158 gv(RC_ST0);
be1b6ba7 grischka2013-04-30 00:33:34 +02002159 r = get_reg(RC_FLOAT);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002160 if (tbt == VT_DOUBLE) {
2161 o(0xf0245cdd); /* fstpl -0x10(%rsp) */
2162 /* movsd -0x10(%rsp),%xmm0 */
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002163 o(0x100ff2);
2164 o(0x44 + REG_VALUE(r)*8);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002165 o(0xf024);
946afd23 James Lyon2013-04-19 18:31:24 +01002166 vtop->r = r;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002167 } else if (tbt == VT_FLOAT) {
2168 o(0xf0245cd9); /* fstps -0x10(%rsp) */
2169 /* movss -0x10(%rsp),%xmm0 */
946afd23
JL
James Lyon2013-04-19 18:31:24 +01002170 o(0x100ff3);
2171 o(0x44 + REG_VALUE(r)*8);
0a9873aa Shinichiro Hamaji2008-12-02 03:19:25 +09002172 o(0xf024);
946afd23 James Lyon2013-04-19 18:31:24 +01002173 vtop->r = r;
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002174 }
2175 }
2176}
2177
2178/* convert fp to int 't' type */
2179void gen_cvt_ftoi(int t)
2180{
2181 int ft, bt, size, r;
2182 ft = vtop->type.t;
2183 bt = ft & VT_BTYPE;
2184 if (bt == VT_LDOUBLE) {
2185 gen_cvt_ftof(VT_DOUBLE);
2186 bt = VT_DOUBLE;
2187 }
2188
946afd23 James Lyon2013-04-19 18:31:24 +01002189 gv(RC_FLOAT);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002190 if (t != VT_INT)
2191 size = 8;
2192 else
2193 size = 4;
2194
2195 r = get_reg(RC_INT);
2196 if (bt == VT_FLOAT) {
2197 o(0xf3);
2198 } else if (bt == VT_DOUBLE) {
2199 o(0xf2);
2200 } else {
2201 assert(0);
2202 }
070b86a8 grischka2009-12-20 02:19:51 +01002203 orex(size == 8, r, 0, 0x2c0f); /* cvttss2si or cvttsd2si */
946afd23 James Lyon2013-04-19 18:31:24 +01002204 o(0xc0 + REG_VALUE(vtop->r) + REG_VALUE(r)*8);
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002205 vtop->r = r;
2206}
2207
2208/* computed goto support */
2209void ggoto(void)
2210{
2211 gcall_or_jmp(1);
2212 vtop--;
2213}
2214
41b3c7a5
JL
James Lyon2013-04-27 20:39:34 +01002215/* Save the stack pointer onto the stack and return the location of its address */
2216ST_FUNC void gen_vla_sp_save(int addr) {
2217 /* mov %rsp,addr(%rbp)*/
2218 gen_modrm64(0x89, TREG_RSP, VT_LOCAL, NULL, addr);
2219}
2220
2221/* Restore the SP from a location on the stack */
2222ST_FUNC void gen_vla_sp_restore(int addr) {
2223 gen_modrm64(0x8b, TREG_RSP, VT_LOCAL, NULL, addr);
2224}
2225
2226/* Subtract from the stack pointer, and push the resulting value onto the stack */
2227ST_FUNC void gen_vla_alloc(CType *type, int align) {
c75d0dee seyko2015-05-04 04:19:24 +03002228 int r;
41b3c7a5
JL
James Lyon2013-04-27 20:39:34 +01002229#ifdef TCC_TARGET_PE
2230 /* alloca does more than just adjust %rsp on Windows */
2231 vpush_global_sym(&func_old_type, TOK_alloca);
2232 vswap(); /* Move alloca ref past allocation size */
2233 gfunc_call(1);
2234 vset(type, REG_IRET, 0);
2235#else
41b3c7a5
JL
James Lyon2013-04-27 20:39:34 +01002236 r = gv(RC_INT); /* allocation size */
2237 /* sub r,%rsp */
2238 o(0x2b48);
2239 o(0xe0 | REG_VALUE(r));
2240 /* We align to 16 bytes rather than align */
2241 /* and ~15, %rsp */
2242 o(0xf0e48348);
41b3c7a5 James Lyon2013-04-27 20:39:34 +01002243 vpop();
41b3c7a5
JL
James Lyon2013-04-27 20:39:34 +01002244#endif
2245}
2246
2247
0a9873aa
SH
Shinichiro Hamaji2008-12-02 03:19:25 +09002248/* end of x86-64 code generator */
2249/*************************************************************/
88a3ccab grischka2009-12-20 01:53:49 +01002250#endif /* ! TARGET_DEFS_ONLY */
2251/******************************************************/