4 * Copyright (c) 2008 Fabrice Bellard
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #define DATA_BITS (1 << (3 + SHIFT))
21 #define SHIFT_MASK (DATA_BITS - 1)
22 #define SIGN_MASK (((target_ulong)1) << (DATA_BITS - 1))
24 #define SHIFT1_MASK 0x1f
26 #define SHIFT1_MASK 0x3f
31 #define DATA_TYPE uint8_t
32 #define DATA_STYPE int8_t
33 #define DATA_MASK 0xff
36 #define DATA_TYPE uint16_t
37 #define DATA_STYPE int16_t
38 #define DATA_MASK 0xffff
41 #define DATA_TYPE uint32_t
42 #define DATA_STYPE int32_t
43 #define DATA_MASK 0xffffffff
46 #define DATA_TYPE uint64_t
47 #define DATA_STYPE int64_t
48 #define DATA_MASK 0xffffffffffffffffULL
50 #error unhandled operand size
53 /* dynamic flags computation */
55 static int glue(compute_all_add, SUFFIX)(void)
57 int cf, pf, af, zf, sf, of;
58 target_long src1, src2;
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;
70 static int glue(compute_c_add, SUFFIX)(void)
75 cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1;
79 static int glue(compute_all_adc, SUFFIX)(void)
81 int cf, pf, af, zf, sf, of;
82 target_long src1, src2;
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;
94 static int glue(compute_c_adc, SUFFIX)(void)
99 cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1;
103 static int glue(compute_all_sub, SUFFIX)(void)
105 int cf, pf, af, zf, sf, of;
106 target_long src1, src2;
107 src1 = CC_DST + 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;
118 static int glue(compute_c_sub, SUFFIX)(void)
121 target_long src1, src2;
122 src1 = CC_DST + CC_SRC;
124 cf = (DATA_TYPE)src1 < (DATA_TYPE)src2;
128 static int glue(compute_all_sbb, SUFFIX)(void)
130 int cf, pf, af, zf, sf, of;
131 target_long src1, src2;
132 src1 = CC_DST + CC_SRC + 1;
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;
143 static int glue(compute_c_sbb, SUFFIX)(void)
146 target_long src1, src2;
147 src1 = CC_DST + CC_SRC + 1;
149 cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2;
153 static int glue(compute_all_logic, SUFFIX)(void)
155 int cf, pf, af, zf, sf, of;
157 pf = parity_table[(uint8_t)CC_DST];
159 zf = ((DATA_TYPE)CC_DST == 0) << 6;
160 sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
162 return cf | pf | af | zf | sf | of;
165 static int glue(compute_c_logic, SUFFIX)(void)
170 static int glue(compute_all_inc, SUFFIX)(void)
172 int cf, pf, af, zf, sf, of;
173 target_long src1, src2;
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;
186 static int glue(compute_c_inc, SUFFIX)(void)
192 static int glue(compute_all_dec, SUFFIX)(void)
194 int cf, pf, af, zf, sf, of;
195 target_long src1, src2;
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;
207 static int glue(compute_all_shl, SUFFIX)(void)
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;
220 static int glue(compute_c_shl, SUFFIX)(void)
222 return (CC_SRC >> (DATA_BITS - 1)) & CC_C;
226 static int glue(compute_c_sar, SUFFIX)(void)
232 static int glue(compute_all_sar, SUFFIX)(void)
234 int cf, pf, af, zf, sf, of;
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;
246 static int glue(compute_c_mul, SUFFIX)(void)
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)
258 int cf, pf, af, zf, sf, of;
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;
265 return cf | pf | af | zf | sf | of;
270 target_ulong glue(helper_rcl, SUFFIX)(target_ulong t0, target_ulong t1)
276 count = t1 & SHIFT1_MASK;
278 count = rclw_table[count];
280 count = rclb_table[count];
283 eflags = helper_cc_compute_all(CC_OP);
286 res = (t0 << count) | ((target_ulong)(eflags & CC_C) << (count - 1));
288 res |= t0 >> (DATA_BITS + 1 - count);
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);
299 target_ulong glue(helper_rcr, SUFFIX)(target_ulong t0, target_ulong t1)
305 count = t1 & SHIFT1_MASK;
307 count = rclw_table[count];
309 count = rclb_table[count];
312 eflags = helper_cc_compute_all(CC_OP);
315 res = (t0 >> count) | ((target_ulong)(eflags & CC_C) << (DATA_BITS - count));
317 res |= t0 << (DATA_BITS + 1 - count);
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);