1 /*
2 * x86 condition code helpers
3 *
4 * Copyright (c) 2003 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
21 #include "cpu.h"
22 #include "helper.h"
23
24 const uint8_t parity_table[256] = {
25 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
26 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
27 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
28 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
29 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
30 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
31 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
32 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
33 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
34 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
35 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
36 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
37 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
38 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
39 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
40 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
41 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
42 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
43 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
44 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
45 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
46 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
47 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
48 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
49 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
50 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
51 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
52 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
53 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
54 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
55 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
56 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
57 };
58
59 #define SHIFT 0
60 #include "cc_helper_template.h"
61 #undef SHIFT
62
63 #define SHIFT 1
64 #include "cc_helper_template.h"
65 #undef SHIFT
66
67 #define SHIFT 2
68 #include "cc_helper_template.h"
69 #undef SHIFT
70
71 #ifdef TARGET_X86_64
72 #define SHIFT 3
73 #include "cc_helper_template.h"
74 #undef SHIFT
75 #endif
76
compute_all_eflags(CPUX86State * env)77 static int compute_all_eflags(CPUX86State *env)
78 {
79 return CC_SRC;
80 }
81
compute_c_eflags(CPUX86State * env)82 static int compute_c_eflags(CPUX86State *env)
83 {
84 return CC_SRC & CC_C;
85 }
86
helper_cc_compute_all(CPUX86State * env,int op)87 uint32_t helper_cc_compute_all(CPUX86State *env, int op)
88 {
89 switch (op) {
90 default: /* should never happen */ return 0;
91
92 case CC_OP_EFLAGS: return compute_all_eflags(env);
93
94 case CC_OP_MULB: return compute_all_mulb(env);
95 case CC_OP_MULW: return compute_all_mulw(env);
96 case CC_OP_MULL: return compute_all_mull(env);
97
98 case CC_OP_ADDB: return compute_all_addb(env);
99 case CC_OP_ADDW: return compute_all_addw(env);
100 case CC_OP_ADDL: return compute_all_addl(env);
101
102 case CC_OP_ADCB: return compute_all_adcb(env);
103 case CC_OP_ADCW: return compute_all_adcw(env);
104 case CC_OP_ADCL: return compute_all_adcl(env);
105
106 case CC_OP_SUBB: return compute_all_subb(env);
107 case CC_OP_SUBW: return compute_all_subw(env);
108 case CC_OP_SUBL: return compute_all_subl(env);
109
110 case CC_OP_SBBB: return compute_all_sbbb(env);
111 case CC_OP_SBBW: return compute_all_sbbw(env);
112 case CC_OP_SBBL: return compute_all_sbbl(env);
113
114 case CC_OP_LOGICB: return compute_all_logicb(env);
115 case CC_OP_LOGICW: return compute_all_logicw(env);
116 case CC_OP_LOGICL: return compute_all_logicl(env);
117
118 case CC_OP_INCB: return compute_all_incb(env);
119 case CC_OP_INCW: return compute_all_incw(env);
120 case CC_OP_INCL: return compute_all_incl(env);
121
122 case CC_OP_DECB: return compute_all_decb(env);
123 case CC_OP_DECW: return compute_all_decw(env);
124 case CC_OP_DECL: return compute_all_decl(env);
125
126 case CC_OP_SHLB: return compute_all_shlb(env);
127 case CC_OP_SHLW: return compute_all_shlw(env);
128 case CC_OP_SHLL: return compute_all_shll(env);
129
130 case CC_OP_SARB: return compute_all_sarb(env);
131 case CC_OP_SARW: return compute_all_sarw(env);
132 case CC_OP_SARL: return compute_all_sarl(env);
133
134 #ifdef TARGET_X86_64
135 case CC_OP_MULQ: return compute_all_mulq(env);
136
137 case CC_OP_ADDQ: return compute_all_addq(env);
138
139 case CC_OP_ADCQ: return compute_all_adcq(env);
140
141 case CC_OP_SUBQ: return compute_all_subq(env);
142
143 case CC_OP_SBBQ: return compute_all_sbbq(env);
144
145 case CC_OP_LOGICQ: return compute_all_logicq(env);
146
147 case CC_OP_INCQ: return compute_all_incq(env);
148
149 case CC_OP_DECQ: return compute_all_decq(env);
150
151 case CC_OP_SHLQ: return compute_all_shlq(env);
152
153 case CC_OP_SARQ: return compute_all_sarq(env);
154 #endif
155 }
156 }
157
cpu_cc_compute_all(CPUArchState * env1,int op)158 uint32_t cpu_cc_compute_all(CPUArchState *env1, int op)
159 {
160 return helper_cc_compute_all(env1, op);
161 }
162
helper_cc_compute_c(CPUX86State * env,int op)163 uint32_t helper_cc_compute_c(CPUX86State *env, int op)
164 {
165 switch (op) {
166 default: /* should never happen */ return 0;
167
168 case CC_OP_EFLAGS: return compute_c_eflags(env);
169
170 case CC_OP_MULB: return compute_c_mull(env);
171 case CC_OP_MULW: return compute_c_mull(env);
172 case CC_OP_MULL: return compute_c_mull(env);
173
174 case CC_OP_ADDB: return compute_c_addb(env);
175 case CC_OP_ADDW: return compute_c_addw(env);
176 case CC_OP_ADDL: return compute_c_addl(env);
177
178 case CC_OP_ADCB: return compute_c_adcb(env);
179 case CC_OP_ADCW: return compute_c_adcw(env);
180 case CC_OP_ADCL: return compute_c_adcl(env);
181
182 case CC_OP_SUBB: return compute_c_subb(env);
183 case CC_OP_SUBW: return compute_c_subw(env);
184 case CC_OP_SUBL: return compute_c_subl(env);
185
186 case CC_OP_SBBB: return compute_c_sbbb(env);
187 case CC_OP_SBBW: return compute_c_sbbw(env);
188 case CC_OP_SBBL: return compute_c_sbbl(env);
189
190 case CC_OP_LOGICB: return compute_c_logicb(env);
191 case CC_OP_LOGICW: return compute_c_logicw(env);
192 case CC_OP_LOGICL: return compute_c_logicl(env);
193
194 case CC_OP_INCB: return compute_c_incl(env);
195 case CC_OP_INCW: return compute_c_incl(env);
196 case CC_OP_INCL: return compute_c_incl(env);
197
198 case CC_OP_DECB: return compute_c_incl(env);
199 case CC_OP_DECW: return compute_c_incl(env);
200 case CC_OP_DECL: return compute_c_incl(env);
201
202 case CC_OP_SHLB: return compute_c_shlb(env);
203 case CC_OP_SHLW: return compute_c_shlw(env);
204 case CC_OP_SHLL: return compute_c_shll(env);
205
206 case CC_OP_SARB: return compute_c_sarl(env);
207 case CC_OP_SARW: return compute_c_sarl(env);
208 case CC_OP_SARL: return compute_c_sarl(env);
209
210 #ifdef TARGET_X86_64
211 case CC_OP_MULQ: return compute_c_mull(env);
212
213 case CC_OP_ADDQ: return compute_c_addq(env);
214
215 case CC_OP_ADCQ: return compute_c_adcq(env);
216
217 case CC_OP_SUBQ: return compute_c_subq(env);
218
219 case CC_OP_SBBQ: return compute_c_sbbq(env);
220
221 case CC_OP_LOGICQ: return compute_c_logicq(env);
222
223 case CC_OP_INCQ: return compute_c_incl(env);
224
225 case CC_OP_DECQ: return compute_c_incl(env);
226
227 case CC_OP_SHLQ: return compute_c_shlq(env);
228
229 case CC_OP_SARQ: return compute_c_sarl(env);
230 #endif
231 }
232 }
233
helper_write_eflags(CPUX86State * env,target_ulong t0,uint32_t update_mask)234 void helper_write_eflags(CPUX86State *env,
235 target_ulong t0, uint32_t update_mask)
236 {
237 cpu_load_eflags(env, t0, update_mask);
238 }
239
helper_read_eflags(CPUX86State * env)240 target_ulong helper_read_eflags(CPUX86State *env)
241 {
242 uint32_t eflags;
243 eflags = helper_cc_compute_all(env, CC_OP);
244 eflags |= (DF & DF_MASK);
245 eflags |= env->eflags & ~(VM_MASK | RF_MASK);
246 return eflags;
247 }
248
helper_clts(CPUX86State * env)249 void helper_clts(CPUX86State *env)
250 {
251 env->cr[0] &= ~CR0_TS_MASK;
252 env->hflags &= ~HF_TS_MASK;
253 }
254
helper_reset_rf(CPUX86State * env)255 void helper_reset_rf(CPUX86State *env)
256 {
257 env->eflags &= ~RF_MASK;
258 }
259
helper_cli(CPUX86State * env)260 void helper_cli(CPUX86State *env)
261 {
262 env->eflags &= ~IF_MASK;
263 }
264
helper_sti(CPUX86State * env)265 void helper_sti(CPUX86State *env)
266 {
267 env->eflags |= IF_MASK;
268 }
269
helper_set_inhibit_irq(CPUX86State * env)270 void helper_set_inhibit_irq(CPUX86State *env)
271 {
272 env->hflags |= HF_INHIBIT_IRQ_MASK;
273 }
274
helper_reset_inhibit_irq(CPUX86State * env)275 void helper_reset_inhibit_irq(CPUX86State *env)
276 {
277 env->hflags &= ~HF_INHIBIT_IRQ_MASK;
278 }
279