root / target-i386 / helper_template.h @ 94909d9f
History | View | Annotate | Download (8.7 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, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
|
19 |
*/
|
20 |
#define DATA_BITS (1 << (3 + SHIFT)) |
21 |
#define SHIFT_MASK (DATA_BITS - 1) |
22 |
#define SIGN_MASK (((target_ulong)1) << (DATA_BITS - 1)) |
23 |
#if DATA_BITS <= 32 |
24 |
#define SHIFT1_MASK 0x1f |
25 |
#else
|
26 |
#define SHIFT1_MASK 0x3f |
27 |
#endif
|
28 |
|
29 |
#if DATA_BITS == 8 |
30 |
#define SUFFIX b
|
31 |
#define DATA_TYPE uint8_t
|
32 |
#define DATA_STYPE int8_t
|
33 |
#define DATA_MASK 0xff |
34 |
#elif DATA_BITS == 16 |
35 |
#define SUFFIX w
|
36 |
#define DATA_TYPE uint16_t
|
37 |
#define DATA_STYPE int16_t
|
38 |
#define DATA_MASK 0xffff |
39 |
#elif DATA_BITS == 32 |
40 |
#define SUFFIX l
|
41 |
#define DATA_TYPE uint32_t
|
42 |
#define DATA_STYPE int32_t
|
43 |
#define DATA_MASK 0xffffffff |
44 |
#elif DATA_BITS == 64 |
45 |
#define SUFFIX q
|
46 |
#define DATA_TYPE uint64_t
|
47 |
#define DATA_STYPE int64_t
|
48 |
#define DATA_MASK 0xffffffffffffffffULL |
49 |
#else
|
50 |
#error unhandled operand size
|
51 |
#endif
|
52 |
|
53 |
/* dynamic flags computation */
|
54 |
|
55 |
static int glue(compute_all_add, SUFFIX)(void) |
56 |
{ |
57 |
int cf, pf, af, zf, sf, of;
|
58 |
target_long src1, src2; |
59 |
src1 = CC_SRC; |
60 |
src2 = CC_DST - CC_SRC; |
61 |
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
62 |
pf = parity_table[(uint8_t)CC_DST]; |
63 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
64 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
65 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
66 |
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
67 |
return cf | pf | af | zf | sf | of;
|
68 |
} |
69 |
|
70 |
static int glue(compute_c_add, SUFFIX)(void) |
71 |
{ |
72 |
int cf;
|
73 |
target_long src1; |
74 |
src1 = CC_SRC; |
75 |
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
76 |
return cf;
|
77 |
} |
78 |
|
79 |
static int glue(compute_all_adc, SUFFIX)(void) |
80 |
{ |
81 |
int cf, pf, af, zf, sf, of;
|
82 |
target_long src1, src2; |
83 |
src1 = CC_SRC; |
84 |
src2 = CC_DST - CC_SRC - 1;
|
85 |
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
86 |
pf = parity_table[(uint8_t)CC_DST]; |
87 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
88 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
89 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
90 |
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
91 |
return cf | pf | af | zf | sf | of;
|
92 |
} |
93 |
|
94 |
static int glue(compute_c_adc, SUFFIX)(void) |
95 |
{ |
96 |
int cf;
|
97 |
target_long src1; |
98 |
src1 = CC_SRC; |
99 |
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
100 |
return cf;
|
101 |
} |
102 |
|
103 |
static int glue(compute_all_sub, SUFFIX)(void) |
104 |
{ |
105 |
int cf, pf, af, zf, sf, of;
|
106 |
target_long src1, src2; |
107 |
src1 = CC_DST + CC_SRC; |
108 |
src2 = CC_SRC; |
109 |
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
110 |
pf = parity_table[(uint8_t)CC_DST]; |
111 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
112 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
113 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
114 |
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
115 |
return cf | pf | af | zf | sf | of;
|
116 |
} |
117 |
|
118 |
static int glue(compute_c_sub, SUFFIX)(void) |
119 |
{ |
120 |
int cf;
|
121 |
target_long src1, src2; |
122 |
src1 = CC_DST + CC_SRC; |
123 |
src2 = CC_SRC; |
124 |
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
125 |
return cf;
|
126 |
} |
127 |
|
128 |
static int glue(compute_all_sbb, SUFFIX)(void) |
129 |
{ |
130 |
int cf, pf, af, zf, sf, of;
|
131 |
target_long src1, src2; |
132 |
src1 = CC_DST + CC_SRC + 1;
|
133 |
src2 = CC_SRC; |
134 |
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
135 |
pf = parity_table[(uint8_t)CC_DST]; |
136 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
137 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
138 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
139 |
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
140 |
return cf | pf | af | zf | sf | of;
|
141 |
} |
142 |
|
143 |
static int glue(compute_c_sbb, SUFFIX)(void) |
144 |
{ |
145 |
int cf;
|
146 |
target_long src1, src2; |
147 |
src1 = CC_DST + CC_SRC + 1;
|
148 |
src2 = CC_SRC; |
149 |
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
150 |
return cf;
|
151 |
} |
152 |
|
153 |
static int glue(compute_all_logic, SUFFIX)(void) |
154 |
{ |
155 |
int cf, pf, af, zf, sf, of;
|
156 |
cf = 0;
|
157 |
pf = parity_table[(uint8_t)CC_DST]; |
158 |
af = 0;
|
159 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
160 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
161 |
of = 0;
|
162 |
return cf | pf | af | zf | sf | of;
|
163 |
} |
164 |
|
165 |
static int glue(compute_c_logic, SUFFIX)(void) |
166 |
{ |
167 |
return 0; |
168 |
} |
169 |
|
170 |
static int glue(compute_all_inc, SUFFIX)(void) |
171 |
{ |
172 |
int cf, pf, af, zf, sf, of;
|
173 |
target_long src1, src2; |
174 |
src1 = CC_DST - 1;
|
175 |
src2 = 1;
|
176 |
cf = CC_SRC; |
177 |
pf = parity_table[(uint8_t)CC_DST]; |
178 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
179 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
180 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
181 |
of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
|
182 |
return cf | pf | af | zf | sf | of;
|
183 |
} |
184 |
|
185 |
#if DATA_BITS == 32 |
186 |
static int glue(compute_c_inc, SUFFIX)(void) |
187 |
{ |
188 |
return CC_SRC;
|
189 |
} |
190 |
#endif
|
191 |
|
192 |
static int glue(compute_all_dec, SUFFIX)(void) |
193 |
{ |
194 |
int cf, pf, af, zf, sf, of;
|
195 |
target_long src1, src2; |
196 |
src1 = CC_DST + 1;
|
197 |
src2 = 1;
|
198 |
cf = CC_SRC; |
199 |
pf = parity_table[(uint8_t)CC_DST]; |
200 |
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
201 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
202 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
203 |
of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11; |
204 |
return cf | pf | af | zf | sf | of;
|
205 |
} |
206 |
|
207 |
static int glue(compute_all_shl, SUFFIX)(void) |
208 |
{ |
209 |
int cf, pf, af, zf, sf, of;
|
210 |
cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
|
211 |
pf = parity_table[(uint8_t)CC_DST]; |
212 |
af = 0; /* undefined */ |
213 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
214 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
215 |
/* of is defined if shift count == 1 */
|
216 |
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
217 |
return cf | pf | af | zf | sf | of;
|
218 |
} |
219 |
|
220 |
static int glue(compute_c_shl, SUFFIX)(void) |
221 |
{ |
222 |
return (CC_SRC >> (DATA_BITS - 1)) & CC_C; |
223 |
} |
224 |
|
225 |
#if DATA_BITS == 32 |
226 |
static int glue(compute_c_sar, SUFFIX)(void) |
227 |
{ |
228 |
return CC_SRC & 1; |
229 |
} |
230 |
#endif
|
231 |
|
232 |
static int glue(compute_all_sar, SUFFIX)(void) |
233 |
{ |
234 |
int cf, pf, af, zf, sf, of;
|
235 |
cf = CC_SRC & 1;
|
236 |
pf = parity_table[(uint8_t)CC_DST]; |
237 |
af = 0; /* undefined */ |
238 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
239 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
240 |
/* of is defined if shift count == 1 */
|
241 |
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
242 |
return cf | pf | af | zf | sf | of;
|
243 |
} |
244 |
|
245 |
#if DATA_BITS == 32 |
246 |
static int glue(compute_c_mul, SUFFIX)(void) |
247 |
{ |
248 |
int cf;
|
249 |
cf = (CC_SRC != 0);
|
250 |
return cf;
|
251 |
} |
252 |
#endif
|
253 |
|
254 |
/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
|
255 |
CF are modified and it is slower to do that. */
|
256 |
static int glue(compute_all_mul, SUFFIX)(void) |
257 |
{ |
258 |
int cf, pf, af, zf, sf, of;
|
259 |
cf = (CC_SRC != 0);
|
260 |
pf = parity_table[(uint8_t)CC_DST]; |
261 |
af = 0; /* undefined */ |
262 |
zf = ((DATA_TYPE)CC_DST == 0) << 6; |
263 |
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
264 |
of = cf << 11;
|
265 |
return cf | pf | af | zf | sf | of;
|
266 |
} |
267 |
|
268 |
/* shifts */
|
269 |
|
270 |
target_ulong glue(helper_rcl, SUFFIX)(target_ulong t0, target_ulong t1) |
271 |
{ |
272 |
int count, eflags;
|
273 |
target_ulong src; |
274 |
target_long res; |
275 |
|
276 |
count = t1 & SHIFT1_MASK; |
277 |
#if DATA_BITS == 16 |
278 |
count = rclw_table[count]; |
279 |
#elif DATA_BITS == 8 |
280 |
count = rclb_table[count]; |
281 |
#endif
|
282 |
if (count) {
|
283 |
eflags = helper_cc_compute_all(CC_OP); |
284 |
t0 &= DATA_MASK; |
285 |
src = t0; |
286 |
res = (t0 << count) | ((target_ulong)(eflags & CC_C) << (count - 1));
|
287 |
if (count > 1) |
288 |
res |= t0 >> (DATA_BITS + 1 - count);
|
289 |
t0 = res; |
290 |
env->cc_tmp = (eflags & ~(CC_C | CC_O)) | |
291 |
(lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
292 |
((src >> (DATA_BITS - count)) & CC_C); |
293 |
} else {
|
294 |
env->cc_tmp = -1;
|
295 |
} |
296 |
return t0;
|
297 |
} |
298 |
|
299 |
target_ulong glue(helper_rcr, SUFFIX)(target_ulong t0, target_ulong t1) |
300 |
{ |
301 |
int count, eflags;
|
302 |
target_ulong src; |
303 |
target_long res; |
304 |
|
305 |
count = t1 & SHIFT1_MASK; |
306 |
#if DATA_BITS == 16 |
307 |
count = rclw_table[count]; |
308 |
#elif DATA_BITS == 8 |
309 |
count = rclb_table[count]; |
310 |
#endif
|
311 |
if (count) {
|
312 |
eflags = helper_cc_compute_all(CC_OP); |
313 |
t0 &= DATA_MASK; |
314 |
src = t0; |
315 |
res = (t0 >> count) | ((target_ulong)(eflags & CC_C) << (DATA_BITS - count)); |
316 |
if (count > 1) |
317 |
res |= t0 << (DATA_BITS + 1 - count);
|
318 |
t0 = res; |
319 |
env->cc_tmp = (eflags & ~(CC_C | CC_O)) | |
320 |
(lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
321 |
((src >> (count - 1)) & CC_C);
|
322 |
} else {
|
323 |
env->cc_tmp = -1;
|
324 |
} |
325 |
return t0;
|
326 |
} |
327 |
|
328 |
#undef DATA_BITS
|
329 |
#undef SHIFT_MASK
|
330 |
#undef SHIFT1_MASK
|
331 |
#undef SIGN_MASK
|
332 |
#undef DATA_TYPE
|
333 |
#undef DATA_STYPE
|
334 |
#undef DATA_MASK
|
335 |
#undef SUFFIX
|