root / target-i386 / helper_template.h @ 73f5e313
History | View | Annotate | Download (8.6 kB)
1 |
/*
|
---|---|
2 |
* i386 helpers
|
3 |
*
|
4 |
* Copyright (c) 2008 Fabrice Bellard
|
5 |
*
|
6 |
* This library is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU Lesser General Public
|
8 |
* License as published by the Free Software Foundation; either
|
9 |
* version 2 of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This library is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 |
* Lesser General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU Lesser General Public
|
17 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
18 |
*/
|
19 |
#define DATA_BITS (1 << (3 + SHIFT)) |
20 |
#define SHIFT_MASK (DATA_BITS - 1) |
21 |
#define SIGN_MASK (((target_ulong)1) << (DATA_BITS - 1)) |
22 |
#if DATA_BITS <= 32 |
23 |
#define SHIFT1_MASK 0x1f |
24 |
#else
|
25 |
#define SHIFT1_MASK 0x3f |
26 |
#endif
|
27 |
|
28 |
#if DATA_BITS == 8 |
29 |
#define SUFFIX b
|
30 |
#define DATA_TYPE uint8_t
|
31 |
#define DATA_STYPE int8_t
|
32 |
#define DATA_MASK 0xff |
33 |
#elif DATA_BITS == 16 |
34 |
#define SUFFIX w
|
35 |
#define DATA_TYPE uint16_t
|
36 |
#define DATA_STYPE int16_t
|
37 |
#define DATA_MASK 0xffff |
38 |
#elif DATA_BITS == 32 |
39 |
#define SUFFIX l
|
40 |
#define DATA_TYPE uint32_t
|
41 |
#define DATA_STYPE int32_t
|
42 |
#define DATA_MASK 0xffffffff |
43 |
#elif DATA_BITS == 64 |
44 |
#define SUFFIX q
|
45 |
#define DATA_TYPE uint64_t
|
46 |
#define DATA_STYPE int64_t
|
47 |
#define DATA_MASK 0xffffffffffffffffULL |
48 |
#else
|
49 |
#error unhandled operand size
|
50 |
#endif
|
51 |
|
52 |
/* dynamic flags computation */
|
53 |
|
54 |
static int glue(compute_all_add, SUFFIX)(void) |
55 |
{ |
56 |
int cf, pf, af, zf, sf, of;
|
57 |
target_long src1, src2; |
58 |
src1 = CC_SRC; |
59 |
src2 = CC_DST - CC_SRC; |
60 |
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
61 |
pf = parity_table[(uint8_t)CC_DST]; |
62 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
63 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
64 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
65 |
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
66 |
return cf | pf | af | zf | sf | of;
|
67 |
} |
68 |
|
69 |
static int glue(compute_c_add, SUFFIX)(void) |
70 |
{ |
71 |
int cf;
|
72 |
target_long src1; |
73 |
src1 = CC_SRC; |
74 |
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
75 |
return cf;
|
76 |
} |
77 |
|
78 |
static int glue(compute_all_adc, SUFFIX)(void) |
79 |
{ |
80 |
int cf, pf, af, zf, sf, of;
|
81 |
target_long src1, src2; |
82 |
src1 = CC_SRC; |
83 |
src2 = CC_DST - CC_SRC - 1;
|
84 |
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
85 |
pf = parity_table[(uint8_t)CC_DST]; |
86 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
87 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
88 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
89 |
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
90 |
return cf | pf | af | zf | sf | of;
|
91 |
} |
92 |
|
93 |
static int glue(compute_c_adc, SUFFIX)(void) |
94 |
{ |
95 |
int cf;
|
96 |
target_long src1; |
97 |
src1 = CC_SRC; |
98 |
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
99 |
return cf;
|
100 |
} |
101 |
|
102 |
static int glue(compute_all_sub, SUFFIX)(void) |
103 |
{ |
104 |
int cf, pf, af, zf, sf, of;
|
105 |
target_long src1, src2; |
106 |
src1 = CC_DST + CC_SRC; |
107 |
src2 = CC_SRC; |
108 |
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
109 |
pf = parity_table[(uint8_t)CC_DST]; |
110 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
111 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
112 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
113 |
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
114 |
return cf | pf | af | zf | sf | of;
|
115 |
} |
116 |
|
117 |
static int glue(compute_c_sub, SUFFIX)(void) |
118 |
{ |
119 |
int cf;
|
120 |
target_long src1, src2; |
121 |
src1 = CC_DST + CC_SRC; |
122 |
src2 = CC_SRC; |
123 |
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
124 |
return cf;
|
125 |
} |
126 |
|
127 |
static int glue(compute_all_sbb, SUFFIX)(void) |
128 |
{ |
129 |
int cf, pf, af, zf, sf, of;
|
130 |
target_long src1, src2; |
131 |
src1 = CC_DST + CC_SRC + 1;
|
132 |
src2 = CC_SRC; |
133 |
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
134 |
pf = parity_table[(uint8_t)CC_DST]; |
135 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
136 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
137 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
138 |
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
139 |
return cf | pf | af | zf | sf | of;
|
140 |
} |
141 |
|
142 |
static int glue(compute_c_sbb, SUFFIX)(void) |
143 |
{ |
144 |
int cf;
|
145 |
target_long src1, src2; |
146 |
src1 = CC_DST + CC_SRC + 1;
|
147 |
src2 = CC_SRC; |
148 |
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
149 |
return cf;
|
150 |
} |
151 |
|
152 |
static int glue(compute_all_logic, SUFFIX)(void) |
153 |
{ |
154 |
int cf, pf, af, zf, sf, of;
|
155 |
cf = 0;
|
156 |
pf = parity_table[(uint8_t)CC_DST]; |
157 |
af = 0;
|
158 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
159 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
160 |
of = 0;
|
161 |
return cf | pf | af | zf | sf | of;
|
162 |
} |
163 |
|
164 |
static int glue(compute_c_logic, SUFFIX)(void) |
165 |
{ |
166 |
return 0; |
167 |
} |
168 |
|
169 |
static int glue(compute_all_inc, SUFFIX)(void) |
170 |
{ |
171 |
int cf, pf, af, zf, sf, of;
|
172 |
target_long src1, src2; |
173 |
src1 = CC_DST - 1;
|
174 |
src2 = 1;
|
175 |
cf = CC_SRC; |
176 |
pf = parity_table[(uint8_t)CC_DST]; |
177 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
178 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
179 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
180 |
of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
|
181 |
return cf | pf | af | zf | sf | of;
|
182 |
} |
183 |
|
184 |
#if DATA_BITS == 32 |
185 |
static int glue(compute_c_inc, SUFFIX)(void) |
186 |
{ |
187 |
return CC_SRC;
|
188 |
} |
189 |
#endif
|
190 |
|
191 |
static int glue(compute_all_dec, SUFFIX)(void) |
192 |
{ |
193 |
int cf, pf, af, zf, sf, of;
|
194 |
target_long src1, src2; |
195 |
src1 = CC_DST + 1;
|
196 |
src2 = 1;
|
197 |
cf = CC_SRC; |
198 |
pf = parity_table[(uint8_t)CC_DST]; |
199 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
200 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
201 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
202 |
of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11; |
203 |
return cf | pf | af | zf | sf | of;
|
204 |
} |
205 |
|
206 |
static int glue(compute_all_shl, SUFFIX)(void) |
207 |
{ |
208 |
int cf, pf, af, zf, sf, of;
|
209 |
cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
|
210 |
pf = parity_table[(uint8_t)CC_DST]; |
211 |
af = 0; /* undefined */ |
212 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
213 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
214 |
/* of is defined if shift count == 1 */
|
215 |
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
216 |
return cf | pf | af | zf | sf | of;
|
217 |
} |
218 |
|
219 |
static int glue(compute_c_shl, SUFFIX)(void) |
220 |
{ |
221 |
return (CC_SRC >> (DATA_BITS - 1)) & CC_C; |
222 |
} |
223 |
|
224 |
#if DATA_BITS == 32 |
225 |
static int glue(compute_c_sar, SUFFIX)(void) |
226 |
{ |
227 |
return CC_SRC & 1; |
228 |
} |
229 |
#endif
|
230 |
|
231 |
static int glue(compute_all_sar, SUFFIX)(void) |
232 |
{ |
233 |
int cf, pf, af, zf, sf, of;
|
234 |
cf = CC_SRC & 1;
|
235 |
pf = parity_table[(uint8_t)CC_DST]; |
236 |
af = 0; /* undefined */ |
237 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
238 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
239 |
/* of is defined if shift count == 1 */
|
240 |
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
241 |
return cf | pf | af | zf | sf | of;
|
242 |
} |
243 |
|
244 |
#if DATA_BITS == 32 |
245 |
static int glue(compute_c_mul, SUFFIX)(void) |
246 |
{ |
247 |
int cf;
|
248 |
cf = (CC_SRC != 0);
|
249 |
return cf;
|
250 |
} |
251 |
#endif
|
252 |
|
253 |
/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
|
254 |
CF are modified and it is slower to do that. */
|
255 |
static int glue(compute_all_mul, SUFFIX)(void) |
256 |
{ |
257 |
int cf, pf, af, zf, sf, of;
|
258 |
cf = (CC_SRC != 0);
|
259 |
pf = parity_table[(uint8_t)CC_DST]; |
260 |
af = 0; /* undefined */ |
261 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
262 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
263 |
of = cf << 11;
|
264 |
return cf | pf | af | zf | sf | of;
|
265 |
} |
266 |
|
267 |
/* shifts */
|
268 |
|
269 |
target_ulong glue(helper_rcl, SUFFIX)(target_ulong t0, target_ulong t1) |
270 |
{ |
271 |
int count, eflags;
|
272 |
target_ulong src; |
273 |
target_long res; |
274 |
|
275 |
count = t1 & SHIFT1_MASK; |
276 |
#if DATA_BITS == 16 |
277 |
count = rclw_table[count]; |
278 |
#elif DATA_BITS == 8 |
279 |
count = rclb_table[count]; |
280 |
#endif
|
281 |
if (count) {
|
282 |
eflags = helper_cc_compute_all(CC_OP); |
283 |
t0 &= DATA_MASK; |
284 |
src = t0; |
285 |
res = (t0 << count) | ((target_ulong)(eflags & CC_C) << (count - 1));
|
286 |
if (count > 1) |
287 |
res |= t0 >> (DATA_BITS + 1 - count);
|
288 |
t0 = res; |
289 |
env->cc_tmp = (eflags & ~(CC_C | CC_O)) | |
290 |
(lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
291 |
((src >> (DATA_BITS - count)) & CC_C); |
292 |
} else {
|
293 |
env->cc_tmp = -1;
|
294 |
} |
295 |
return t0;
|
296 |
} |
297 |
|
298 |
target_ulong glue(helper_rcr, SUFFIX)(target_ulong t0, target_ulong t1) |
299 |
{ |
300 |
int count, eflags;
|
301 |
target_ulong src; |
302 |
target_long res; |
303 |
|
304 |
count = t1 & SHIFT1_MASK; |
305 |
#if DATA_BITS == 16 |
306 |
count = rclw_table[count]; |
307 |
#elif DATA_BITS == 8 |
308 |
count = rclb_table[count]; |
309 |
#endif
|
310 |
if (count) {
|
311 |
eflags = helper_cc_compute_all(CC_OP); |
312 |
t0 &= DATA_MASK; |
313 |
src = t0; |
314 |
res = (t0 >> count) | ((target_ulong)(eflags & CC_C) << (DATA_BITS - count)); |
315 |
if (count > 1) |
316 |
res |= t0 << (DATA_BITS + 1 - count);
|
317 |
t0 = res; |
318 |
env->cc_tmp = (eflags & ~(CC_C | CC_O)) | |
319 |
(lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
320 |
((src >> (count - 1)) & CC_C);
|
321 |
} else {
|
322 |
env->cc_tmp = -1;
|
323 |
} |
324 |
return t0;
|
325 |
} |
326 |
|
327 |
#undef DATA_BITS
|
328 |
#undef SHIFT_MASK
|
329 |
#undef SHIFT1_MASK
|
330 |
#undef SIGN_MASK
|
331 |
#undef DATA_TYPE
|
332 |
#undef DATA_STYPE
|
333 |
#undef DATA_MASK
|
334 |
#undef SUFFIX
|