Revision 367e86e8 op-i386.c
| b/op-i386.c | ||
|---|---|---|
| 8 | 8 |
typedef signed int int32_t; |
| 9 | 9 |
typedef signed long long int64_t; |
| 10 | 10 |
|
| 11 |
#define NULL 0 |
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| 12 |
|
|
| 11 | 13 |
#ifdef __i386__ |
| 12 | 14 |
register int T0 asm("esi");
|
| 13 | 15 |
register int T1 asm("ebx");
|
| ... | ... | |
| 74 | 76 |
#include "cpu-i386.h" |
| 75 | 77 |
|
| 76 | 78 |
typedef struct CCTable {
|
| 77 |
int (*compute_c)(void); /* return the C flag */ |
|
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int (*compute_z)(void); /* return the Z flag */ |
|
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int (*compute_s)(void); /* return the S flag */ |
|
| 80 |
int (*compute_o)(void); /* return the O flag */ |
|
| 81 | 79 |
int (*compute_all)(void); /* return all the flags */ |
| 80 |
int (*compute_c)(void); /* return the C flag */ |
|
| 82 | 81 |
} CCTable; |
| 83 | 82 |
|
| 83 |
extern CCTable cc_table[]; |
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| 84 |
|
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| 84 | 85 |
uint8_t parity_table[256] = {
|
| 85 | 86 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 86 | 87 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| ... | ... | |
| 116 | 117 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 117 | 118 |
}; |
| 118 | 119 |
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static int compute_eflags_all(void) |
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{
|
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return CC_SRC; |
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} |
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|
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static int compute_eflags_addb(void) |
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{
|
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int cf, pf, af, zf, sf, of; |
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int src1, src2; |
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src1 = CC_SRC; |
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src2 = CC_DST - CC_SRC; |
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cf = (uint8_t)CC_DST < (uint8_t)src1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10; |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = ((src1 ^ src2 ^ -1) & (src1 ^ CC_DST) & 0x80) << 4; |
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return cf | pf | af | zf | sf | of; |
|
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} |
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|
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static int compute_eflags_subb(void) |
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{
|
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int cf, pf, af, zf, sf, of; |
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int src1, src2; |
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src1 = CC_SRC; |
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src2 = CC_SRC - CC_DST; |
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cf = (uint8_t)src1 < (uint8_t)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10; |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = ((src1 ^ src2 ^ -1) & (src1 ^ CC_DST) & 0x80) << 4; |
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return cf | pf | af | zf | sf | of; |
|
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} |
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|
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static int compute_eflags_logicb(void) |
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{
|
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cf = 0; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = 0; |
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return cf | pf | af | zf | sf | of; |
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} |
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|
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static int compute_eflags_incb(void) |
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{
|
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int cf, pf, af, zf, sf, of; |
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int src2; |
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src1 = CC_DST - 1; |
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src2 = 1; |
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10; |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = ((src1 ^ src2 ^ -1) & (src1 ^ CC_DST) & 0x80) << 4; |
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return cf | pf | af | zf | sf | of; |
|
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} |
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|
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static int compute_eflags_decb(void) |
|
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{
|
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int cf, pf, af, zf, sf, of; |
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int src1, src2; |
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src1 = CC_DST + 1; |
|
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src2 = 1; |
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cf = (uint8_t)src1 < (uint8_t)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10; |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = ((src1 ^ src2 ^ -1) & (src1 ^ CC_DST) & 0x80) << 4; |
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return cf | pf | af | zf | sf | of; |
|
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} |
|
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|
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static int compute_eflags_shlb(void) |
|
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{
|
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
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of = 0; /* undefined */ |
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return cf | pf | af | zf | sf | of; |
|
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} |
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/* modulo 17 table */ |
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const uint8_t rclw_table[32] = {
|
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0, 1, 2, 3, 4, 5, 6, 7, |
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8, 9,10,11,12,13,14,15, |
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16, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 9,10,11,12,13,14, |
|
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}; |
|
| 205 | 127 |
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static int compute_eflags_shrb(void) |
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{
|
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cf = CC_SRC & 1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((uint8_t)CC_DST != 0) << 6; |
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sf = CC_DST & 0x80; |
|
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of = sf << 4; |
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return cf | pf | af | zf | sf | of; |
|
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} |
|
| 128 |
/* modulo 9 table */ |
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const uint8_t rclb_table[32] = {
|
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0, 1, 2, 3, 4, 5, 6, 7, |
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8, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 0, 1, 2, 3, 4, 5, |
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6, 7, 8, 0, 1, 2, 3, 4, |
|
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}; |
|
| 216 | 135 |
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static int compute_eflags_mul(void) |
|
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/* n must be a constant to be efficient */ |
|
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static inline int lshift(int x, int n) |
|
| 218 | 138 |
{
|
| 219 |
cf = (CC_SRC != 0); |
|
| 220 |
pf = 0; /* undefined */ |
|
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af = 0; /* undefined */ |
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zf = 0; /* undefined */ |
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sf = 0; /* undefined */ |
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of = cf << 11; |
|
| 225 |
return cf | pf | af | zf | sf | of; |
|
| 139 |
if (n >= 0) |
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return x << n; |
|
| 141 |
else |
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return x >> (-n); |
|
| 226 | 143 |
} |
| 227 |
|
|
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CTable cc_table[CC_OP_NB] = {
|
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| 229 |
[CC_OP_DYNAMIC] = { NULL, NULL, NULL },
|
|
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[CC_OP_EFLAGS] = { NULL, NULL, NULL },
|
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|
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}; |
|
| 233 | 144 |
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/* we define the various pieces of code used by the JIT */ |
| 235 | 146 |
|
| ... | ... | |
| 365 | 276 |
CC_DST = T0 & T1; |
| 366 | 277 |
} |
| 367 | 278 |
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/* shifts */ |
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|
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void OPPROTO op_roll_T0_T1_cc(void) |
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{
|
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int count; |
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count = T1 & 0x1f; |
|
| 374 |
if (count) {
|
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CC_SRC = T0; |
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T0 = (T0 << count) | (T0 >> (32 - count)); |
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| 377 |
CC_DST = T0; |
|
| 378 |
CC_OP = CC_OP_ROLL; |
|
| 379 |
} |
|
| 380 |
} |
|
| 381 |
|
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void OPPROTO op_rolw_T0_T1_cc(void) |
|
| 383 |
{
|
|
| 384 |
int count; |
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| 385 |
count = T1 & 0xf; |
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if (count) {
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| 387 |
T0 = T0 & 0xffff; |
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| 388 |
CC_SRC = T0; |
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T0 = (T0 << count) | (T0 >> (16 - count)); |
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CC_DST = T0; |
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CC_OP = CC_OP_ROLW; |
|
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} |
|
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} |
|
| 394 |
|
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void OPPROTO op_rolb_T0_T1_cc(void) |
|
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{
|
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int count; |
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count = T1 & 0x7; |
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| 399 |
if (count) {
|
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T0 = T0 & 0xff; |
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| 401 |
CC_SRC = T0; |
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| 402 |
T0 = (T0 << count) | (T0 >> (8 - count)); |
|
| 403 |
CC_DST = T0; |
|
| 404 |
CC_OP = CC_OP_ROLB; |
|
| 405 |
} |
|
| 406 |
} |
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| 407 |
|
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| 408 |
void OPPROTO op_rorl_T0_T1_cc(void) |
|
| 409 |
{
|
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| 410 |
int count; |
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| 411 |
count = T1 & 0x1f; |
|
| 412 |
if (count) {
|
|
| 413 |
CC_SRC = T0; |
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| 414 |
T0 = (T0 >> count) | (T0 << (32 - count)); |
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| 415 |
CC_DST = T0; |
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| 416 |
CC_OP = CC_OP_RORB; |
|
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} |
|
| 418 |
} |
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| 419 |
|
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| 420 |
void OPPROTO op_rorw_T0_T1_cc(void) |
|
| 421 |
{
|
|
| 422 |
int count; |
|
| 423 |
count = T1 & 0xf; |
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| 424 |
if (count) {
|
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| 425 |
CC_SRC = T0; |
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| 426 |
T0 = (T0 >> count) | (T0 << (16 - count)); |
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| 427 |
CC_DST = T0; |
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| 428 |
CC_OP = CC_OP_RORW; |
|
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} |
|
| 430 |
} |
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| 431 |
|
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| 432 |
void OPPROTO op_rorb_T0_T1_cc(void) |
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{
|
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| 434 |
int count; |
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| 435 |
count = T1 & 0x7; |
|
| 436 |
if (count) {
|
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| 437 |
CC_SRC = T0; |
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| 438 |
T0 = (T0 >> count) | (T0 << (8 - count)); |
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| 439 |
CC_DST = T0; |
|
| 440 |
CC_OP = CC_OP_RORL; |
|
| 441 |
} |
|
| 442 |
} |
|
| 443 |
|
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| 444 |
/* modulo 17 table */ |
|
| 445 |
const uint8_t rclw_table[32] = {
|
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| 446 |
0, 1, 2, 3, 4, 5, 6, 7, |
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8, 9,10,11,12,13,14,15, |
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16, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 9,10,11,12,13,14, |
|
| 450 |
}; |
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| 451 |
|
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| 452 |
/* modulo 9 table */ |
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| 453 |
const uint8_t rclb_table[32] = {
|
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| 454 |
0, 1, 2, 3, 4, 5, 6, 7, |
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8, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 0, 1, 2, 3, 4, 5, |
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6, 7, 8, 0, 1, 2, 3, 4, |
|
| 458 |
}; |
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| 459 |
|
|
| 460 |
void helper_rcll_T0_T1_cc(void) |
|
| 461 |
{
|
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| 462 |
int count, res; |
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| 463 |
|
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| 464 |
count = T1 & 0x1f; |
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| 465 |
if (count) {
|
|
| 466 |
CC_SRC = T0; |
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| 467 |
res = (T0 << count) | (cc_table[CC_OP].compute_c() << (count - 1)); |
|
| 468 |
if (count > 1) |
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| 469 |
res |= T0 >> (33 - count); |
|
| 470 |
T0 = res; |
|
| 471 |
CC_DST = T0 ^ CC_SRC; /* O is in bit 31 */ |
|
| 472 |
CC_SRC >>= (32 - count); /* CC is in bit 0 */ |
|
| 473 |
CC_OP = CC_OP_RCLL; |
|
| 474 |
} |
|
| 475 |
} |
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| 476 |
|
|
| 477 |
void OPPROTO op_rcll_T0_T1_cc(void) |
|
| 478 |
{
|
|
| 479 |
helper_rcll_T0_T1_cc(); |
|
| 480 |
} |
|
| 481 |
|
|
| 482 |
void OPPROTO op_rclw_T0_T1_cc(void) |
|
| 483 |
{
|
|
| 484 |
int count; |
|
| 485 |
count = rclw_table[T1 & 0x1f]; |
|
| 486 |
if (count) {
|
|
| 487 |
T0 = T0 & 0xffff; |
|
| 488 |
CC_SRC = T0; |
|
| 489 |
T0 = (T0 << count) | (cc_table[CC_OP].compute_c() << (count - 1)) | |
|
| 490 |
(T0 >> (17 - count)); |
|
| 491 |
CC_DST = T0 ^ CC_SRC; |
|
| 492 |
CC_SRC >>= (16 - count); |
|
| 493 |
CC_OP = CC_OP_RCLW; |
|
| 494 |
} |
|
| 495 |
} |
|
| 496 |
|
|
| 497 |
void OPPROTO op_rclb_T0_T1_cc(void) |
|
| 498 |
{
|
|
| 499 |
int count; |
|
| 500 |
count = rclb_table[T1 & 0x1f]; |
|
| 501 |
if (count) {
|
|
| 502 |
T0 = T0 & 0xff; |
|
| 503 |
CC_SRC = T0; |
|
| 504 |
T0 = (T0 << count) | (cc_table[CC_OP].compute_c() << (count - 1)) | |
|
| 505 |
(T0 >> (9 - count)); |
|
| 506 |
CC_DST = T0 ^ CC_SRC; |
|
| 507 |
CC_SRC >>= (8 - count); |
|
| 508 |
CC_OP = CC_OP_RCLB; |
|
| 509 |
} |
|
| 510 |
} |
|
| 511 |
|
|
| 512 |
void OPPROTO op_rcrl_T0_T1_cc(void) |
|
| 513 |
{
|
|
| 514 |
int count, res; |
|
| 515 |
count = T1 & 0x1f; |
|
| 516 |
if (count) {
|
|
| 517 |
CC_SRC = T0; |
|
| 518 |
res = (T0 >> count) | (cc_table[CC_OP].compute_c() << (32 - count)); |
|
| 519 |
if (count > 1) |
|
| 520 |
res |= T0 << (33 - count); |
|
| 521 |
T0 = res; |
|
| 522 |
CC_DST = T0 ^ CC_SRC; |
|
| 523 |
CC_SRC >>= (count - 1); |
|
| 524 |
CC_OP = CC_OP_RCLL; |
|
| 525 |
} |
|
| 526 |
} |
|
| 527 |
|
|
| 528 |
void OPPROTO op_rcrw_T0_T1_cc(void) |
|
| 529 |
{
|
|
| 530 |
int count; |
|
| 531 |
count = rclw_table[T1 & 0x1f]; |
|
| 532 |
if (count) {
|
|
| 533 |
T0 = T0 & 0xffff; |
|
| 534 |
CC_SRC = T0; |
|
| 535 |
T0 = (T0 >> count) | (cc_table[CC_OP].compute_c() << (16 - count)) | |
|
| 536 |
(T0 << (17 - count)); |
|
| 537 |
CC_DST = T0 ^ CC_SRC; |
|
| 538 |
CC_SRC >>= (count - 1); |
|
| 539 |
CC_OP = CC_OP_RCLW; |
|
| 540 |
} |
|
| 541 |
} |
|
| 542 |
|
|
| 543 |
void OPPROTO op_rcrb_T0_T1_cc(void) |
|
| 544 |
{
|
|
| 545 |
int count; |
|
| 546 |
count = rclb_table[T1 & 0x1f]; |
|
| 547 |
if (count) {
|
|
| 548 |
T0 = T0 & 0xff; |
|
| 549 |
CC_SRC = T0; |
|
| 550 |
T0 = (T0 >> count) | (cc_table[CC_OP].compute_c() << (8 - count)) | |
|
| 551 |
(T0 << (9 - count)); |
|
| 552 |
CC_DST = T0 ^ CC_SRC; |
|
| 553 |
CC_SRC >>= (count - 1); |
|
| 554 |
CC_OP = CC_OP_RCLB; |
|
| 555 |
} |
|
| 556 |
} |
|
| 557 |
|
|
| 558 |
void OPPROTO op_shll_T0_T1_cc(void) |
|
| 559 |
{
|
|
| 560 |
int count; |
|
| 561 |
count = T1 & 0x1f; |
|
| 562 |
if (count == 1) {
|
|
| 563 |
CC_SRC = T0; |
|
| 564 |
T0 = T0 << 1; |
|
| 565 |
CC_DST = T0; |
|
| 566 |
CC_OP = CC_OP_ADDL; |
|
| 567 |
} else if (count) {
|
|
| 568 |
CC_SRC = T0 >> (32 - count); |
|
| 569 |
T0 = T0 << count; |
|
| 570 |
CC_DST = T0; |
|
| 571 |
CC_OP = CC_OP_SHLL; |
|
| 572 |
} |
|
| 573 |
} |
|
| 574 |
|
|
| 575 |
void OPPROTO op_shlw_T0_T1_cc(void) |
|
| 576 |
{
|
|
| 577 |
int count; |
|
| 578 |
count = T1 & 0x1f; |
|
| 579 |
if (count == 1) {
|
|
| 580 |
CC_SRC = T0; |
|
| 581 |
T0 = T0 << 1; |
|
| 582 |
CC_DST = T0; |
|
| 583 |
CC_OP = CC_OP_ADDW; |
|
| 584 |
} else if (count) {
|
|
| 585 |
CC_SRC = T0 >> (16 - count); |
|
| 586 |
T0 = T0 << count; |
|
| 587 |
CC_DST = T0; |
|
| 588 |
CC_OP = CC_OP_SHLW; |
|
| 589 |
} |
|
| 590 |
} |
|
| 591 |
|
|
| 592 |
void OPPROTO op_shlb_T0_T1_cc(void) |
|
| 593 |
{
|
|
| 594 |
int count; |
|
| 595 |
count = T1 & 0x1f; |
|
| 596 |
if (count == 1) {
|
|
| 597 |
CC_SRC = T0; |
|
| 598 |
T0 = T0 << 1; |
|
| 599 |
CC_DST = T0; |
|
| 600 |
CC_OP = CC_OP_ADDB; |
|
| 601 |
} else if (count) {
|
|
| 602 |
CC_SRC = T0 >> (8 - count); |
|
| 603 |
T0 = T0 << count; |
|
| 604 |
CC_DST = T0; |
|
| 605 |
CC_OP = CC_OP_SHLB; |
|
| 606 |
} |
|
| 607 |
} |
|
| 608 |
|
|
| 609 |
void OPPROTO op_shrl_T0_T1_cc(void) |
|
| 610 |
{
|
|
| 611 |
int count; |
|
| 612 |
count = T1 & 0x1f; |
|
| 613 |
if (count == 1) {
|
|
| 614 |
CC_SRC = T0; |
|
| 615 |
T0 = T0 >> 1; |
|
| 616 |
CC_DST = T0; |
|
| 617 |
CC_OP = CC_OP_SHRL; |
|
| 618 |
} else if (count) {
|
|
| 619 |
CC_SRC = T0 >> (count - 1); |
|
| 620 |
T0 = T0 >> count; |
|
| 621 |
CC_DST = T0; |
|
| 622 |
CC_OP = CC_OP_SHLL; |
|
| 623 |
} |
|
| 624 |
} |
|
| 625 |
|
|
| 626 |
void OPPROTO op_shrw_T0_T1_cc(void) |
|
| 627 |
{
|
|
| 628 |
int count; |
|
| 629 |
count = T1 & 0x1f; |
|
| 630 |
if (count == 1) {
|
|
| 631 |
T0 = T0 & 0xffff; |
|
| 632 |
CC_SRC = T0; |
|
| 633 |
T0 = T0 >> 1; |
|
| 634 |
CC_DST = T0; |
|
| 635 |
CC_OP = CC_OP_SHRW; |
|
| 636 |
} else if (count) {
|
|
| 637 |
T0 = T0 & 0xffff; |
|
| 638 |
CC_SRC = T0 >> (count - 1); |
|
| 639 |
T0 = T0 >> count; |
|
| 640 |
CC_DST = T0; |
|
| 641 |
CC_OP = CC_OP_SHLW; |
|
| 642 |
} |
|
| 643 |
} |
|
| 644 |
|
|
| 645 |
void OPPROTO op_shrb_T0_T1_cc(void) |
|
| 646 |
{
|
|
| 647 |
int count; |
|
| 648 |
count = T1 & 0x1f; |
|
| 649 |
if (count == 1) {
|
|
| 650 |
T0 = T0 & 0xff; |
|
| 651 |
CC_SRC = T0; |
|
| 652 |
T0 = T0 >> 1; |
|
| 653 |
CC_DST = T0; |
|
| 654 |
CC_OP = CC_OP_SHRB; |
|
| 655 |
} else if (count) {
|
|
| 656 |
T0 = T0 & 0xff; |
|
| 657 |
CC_SRC = T0 >> (count - 1); |
|
| 658 |
T0 = T0 >> count; |
|
| 659 |
CC_DST = T0; |
|
| 660 |
CC_OP = CC_OP_SHLB; |
|
| 661 |
} |
|
| 662 |
} |
|
| 663 |
|
|
| 664 |
void OPPROTO op_sarl_T0_T1_cc(void) |
|
| 665 |
{
|
|
| 666 |
int count; |
|
| 667 |
count = T1 & 0x1f; |
|
| 668 |
if (count) {
|
|
| 669 |
CC_SRC = (int32_t)T0 >> (count - 1); |
|
| 670 |
T0 = (int32_t)T0 >> count; |
|
| 671 |
CC_DST = T0; |
|
| 672 |
CC_OP = CC_OP_SHLL; |
|
| 673 |
} |
|
| 674 |
} |
|
| 675 |
|
|
| 676 |
void OPPROTO op_sarw_T0_T1_cc(void) |
|
| 677 |
{
|
|
| 678 |
int count; |
|
| 679 |
count = T1 & 0x1f; |
|
| 680 |
if (count) {
|
|
| 681 |
CC_SRC = (int16_t)T0 >> (count - 1); |
|
| 682 |
T0 = (int16_t)T0 >> count; |
|
| 683 |
CC_DST = T0; |
|
| 684 |
CC_OP = CC_OP_SHLW; |
|
| 685 |
} |
|
| 686 |
} |
|
| 687 |
|
|
| 688 |
void OPPROTO op_sarb_T0_T1_cc(void) |
|
| 689 |
{
|
|
| 690 |
int count; |
|
| 691 |
count = T1 & 0x1f; |
|
| 692 |
if (count) {
|
|
| 693 |
CC_SRC = (int8_t)T0 >> (count - 1); |
|
| 694 |
T0 = (int8_t)T0 >> count; |
|
| 695 |
CC_DST = T0; |
|
| 696 |
CC_OP = CC_OP_SHLB; |
|
| 697 |
} |
|
| 698 |
} |
|
| 699 |
|
|
| 700 | 279 |
/* multiply/divide */ |
| 701 | 280 |
void OPPROTO op_mulb_AL_T0(void) |
| 702 | 281 |
{
|
| ... | ... | |
| 924 | 503 |
stl((uint8_t *)A0, T0); |
| 925 | 504 |
} |
| 926 | 505 |
|
| 927 |
/* flags */ |
|
| 928 |
|
|
| 929 |
void OPPROTO op_set_cc_op(void) |
|
| 930 |
{
|
|
| 931 |
CC_OP = PARAM1; |
|
| 932 |
} |
|
| 933 |
|
|
| 934 |
void OPPROTO op_movl_eflags_T0(void) |
|
| 935 |
{
|
|
| 936 |
CC_SRC = T0; |
|
| 937 |
DF = (T0 & DIRECTION_FLAG) ? -1 : 1; |
|
| 938 |
} |
|
| 939 |
|
|
| 940 |
void OPPROTO op_movb_eflags_T0(void) |
|
| 941 |
{
|
|
| 942 |
int cc_o; |
|
| 943 |
cc_o = cc_table[CC_OP].compute_o(); |
|
| 944 |
CC_SRC = T0 | (cc_o << 11); |
|
| 945 |
} |
|
| 946 |
|
|
| 947 |
void OPPROTO op_movl_T0_eflags(void) |
|
| 948 |
{
|
|
| 949 |
cc_table[CC_OP].compute_eflags(); |
|
| 950 |
} |
|
| 951 |
|
|
| 952 |
void OPPROTO op_cld(void) |
|
| 953 |
{
|
|
| 954 |
DF = 1; |
|
| 955 |
} |
|
| 956 |
|
|
| 957 |
void OPPROTO op_std(void) |
|
| 958 |
{
|
|
| 959 |
DF = -1; |
|
| 960 |
} |
|
| 961 |
|
|
| 962 | 506 |
/* jumps */ |
| 963 | 507 |
|
| 964 | 508 |
/* indirect jump */ |
| ... | ... | |
| 972 | 516 |
PC = PARAM1; |
| 973 | 517 |
} |
| 974 | 518 |
|
| 975 |
void OPPROTO op_jne_b(void) |
|
| 976 |
{
|
|
| 977 |
if ((uint8_t)CC_DST != 0) |
|
| 978 |
PC += PARAM1; |
|
| 979 |
else |
|
| 980 |
PC += PARAM2; |
|
| 981 |
FORCE_RET(); |
|
| 982 |
} |
|
| 983 |
|
|
| 984 |
void OPPROTO op_jne_w(void) |
|
| 985 |
{
|
|
| 986 |
if ((uint16_t)CC_DST != 0) |
|
| 987 |
PC += PARAM1; |
|
| 988 |
else |
|
| 989 |
PC += PARAM2; |
|
| 990 |
FORCE_RET(); |
|
| 991 |
} |
|
| 992 |
|
|
| 993 |
void OPPROTO op_jne_l(void) |
|
| 994 |
{
|
|
| 995 |
if (CC_DST != 0) |
|
| 996 |
PC += PARAM1; |
|
| 997 |
else |
|
| 998 |
PC += PARAM2; |
|
| 999 |
FORCE_RET(); /* generate a return so that gcc does not generate an |
|
| 1000 |
early function return */ |
|
| 1001 |
} |
|
| 1002 |
|
|
| 1003 | 519 |
/* string ops */ |
| 1004 | 520 |
|
| 1005 | 521 |
#define ldul ldl |
| 1006 | 522 |
|
| 1007 |
#define SUFFIX b |
|
| 1008 | 523 |
#define SHIFT 0 |
| 1009 |
#include "opstring_template.h" |
|
| 1010 |
#undef SUFFIX |
|
| 524 |
#include "ops_template.h" |
|
| 1011 | 525 |
#undef SHIFT |
| 1012 | 526 |
|
| 1013 |
#define SUFFIX w |
|
| 1014 | 527 |
#define SHIFT 1 |
| 1015 |
#include "opstring_template.h" |
|
| 1016 |
#undef SUFFIX |
|
| 528 |
#include "ops_template.h" |
|
| 1017 | 529 |
#undef SHIFT |
| 1018 | 530 |
|
| 1019 |
#define SUFFIX l |
|
| 1020 | 531 |
#define SHIFT 2 |
| 1021 |
#include "opstring_template.h" |
|
| 1022 |
#undef SUFFIX |
|
| 532 |
#include "ops_template.h" |
|
| 1023 | 533 |
#undef SHIFT |
| 1024 | 534 |
|
| 1025 | 535 |
/* sign extend */ |
| ... | ... | |
| 1095 | 605 |
{
|
| 1096 | 606 |
ESP += PARAM1; |
| 1097 | 607 |
} |
| 608 |
|
|
| 609 |
/* flags handling */ |
|
| 610 |
|
|
| 611 |
/* slow jumps cases (compute x86 flags) */ |
|
| 612 |
void OPPROTO op_jo_cc(void) |
|
| 613 |
{
|
|
| 614 |
int eflags; |
|
| 615 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 616 |
if (eflags & CC_O) |
|
| 617 |
PC += PARAM1; |
|
| 618 |
else |
|
| 619 |
PC += PARAM2; |
|
| 620 |
} |
|
| 621 |
|
|
| 622 |
void OPPROTO op_jb_cc(void) |
|
| 623 |
{
|
|
| 624 |
if (cc_table[CC_OP].compute_c()) |
|
| 625 |
PC += PARAM1; |
|
| 626 |
else |
|
| 627 |
PC += PARAM2; |
|
| 628 |
} |
|
| 629 |
|
|
| 630 |
void OPPROTO op_jz_cc(void) |
|
| 631 |
{
|
|
| 632 |
int eflags; |
|
| 633 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 634 |
if (eflags & CC_Z) |
|
| 635 |
PC += PARAM1; |
|
| 636 |
else |
|
| 637 |
PC += PARAM2; |
|
| 638 |
} |
|
| 639 |
|
|
| 640 |
void OPPROTO op_jbe_cc(void) |
|
| 641 |
{
|
|
| 642 |
int eflags; |
|
| 643 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 644 |
if (eflags & (CC_Z | CC_C)) |
|
| 645 |
PC += PARAM1; |
|
| 646 |
else |
|
| 647 |
PC += PARAM2; |
|
| 648 |
} |
|
| 649 |
|
|
| 650 |
void OPPROTO op_js_cc(void) |
|
| 651 |
{
|
|
| 652 |
int eflags; |
|
| 653 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 654 |
if (eflags & CC_S) |
|
| 655 |
PC += PARAM1; |
|
| 656 |
else |
|
| 657 |
PC += PARAM2; |
|
| 658 |
} |
|
| 659 |
|
|
| 660 |
void OPPROTO op_jp_cc(void) |
|
| 661 |
{
|
|
| 662 |
int eflags; |
|
| 663 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 664 |
if (eflags & CC_P) |
|
| 665 |
PC += PARAM1; |
|
| 666 |
else |
|
| 667 |
PC += PARAM2; |
|
| 668 |
} |
|
| 669 |
|
|
| 670 |
void OPPROTO op_jl_cc(void) |
|
| 671 |
{
|
|
| 672 |
int eflags; |
|
| 673 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 674 |
if ((eflags ^ (eflags >> 4)) & 0x80) |
|
| 675 |
PC += PARAM1; |
|
| 676 |
else |
|
| 677 |
PC += PARAM2; |
|
| 678 |
} |
|
| 679 |
|
|
| 680 |
void OPPROTO op_jle_cc(void) |
|
| 681 |
{
|
|
| 682 |
int eflags; |
|
| 683 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 684 |
if (((eflags ^ (eflags >> 4)) & 0x80) || (eflags & CC_Z)) |
|
| 685 |
PC += PARAM1; |
|
| 686 |
else |
|
| 687 |
PC += PARAM2; |
|
| 688 |
} |
|
| 689 |
|
|
| 690 |
/* slow set cases (compute x86 flags) */ |
|
| 691 |
void OPPROTO op_seto_T0_cc(void) |
|
| 692 |
{
|
|
| 693 |
int eflags; |
|
| 694 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 695 |
T0 = (eflags >> 11) & 1; |
|
| 696 |
} |
|
| 697 |
|
|
| 698 |
void OPPROTO op_setb_T0_cc(void) |
|
| 699 |
{
|
|
| 700 |
T0 = cc_table[CC_OP].compute_c(); |
|
| 701 |
} |
|
| 702 |
|
|
| 703 |
void OPPROTO op_setz_T0_cc(void) |
|
| 704 |
{
|
|
| 705 |
int eflags; |
|
| 706 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 707 |
T0 = (eflags >> 6) & 1; |
|
| 708 |
} |
|
| 709 |
|
|
| 710 |
void OPPROTO op_setbe_T0_cc(void) |
|
| 711 |
{
|
|
| 712 |
int eflags; |
|
| 713 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 714 |
T0 = (eflags & (CC_Z | CC_C)) != 0; |
|
| 715 |
} |
|
| 716 |
|
|
| 717 |
void OPPROTO op_sets_T0_cc(void) |
|
| 718 |
{
|
|
| 719 |
int eflags; |
|
| 720 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 721 |
T0 = (eflags >> 7) & 1; |
|
| 722 |
} |
|
| 723 |
|
|
| 724 |
void OPPROTO op_setp_T0_cc(void) |
|
| 725 |
{
|
|
| 726 |
int eflags; |
|
| 727 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 728 |
T0 = (eflags >> 2) & 1; |
|
| 729 |
} |
|
| 730 |
|
|
| 731 |
void OPPROTO op_setl_T0_cc(void) |
|
| 732 |
{
|
|
| 733 |
int eflags; |
|
| 734 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 735 |
T0 = ((eflags ^ (eflags >> 4)) >> 7) & 1; |
|
| 736 |
} |
|
| 737 |
|
|
| 738 |
void OPPROTO op_setle_T0_cc(void) |
|
| 739 |
{
|
|
| 740 |
int eflags; |
|
| 741 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 742 |
T0 = (((eflags ^ (eflags >> 4)) & 0x80) || (eflags & CC_Z)) != 0; |
|
| 743 |
} |
|
| 744 |
|
|
| 745 |
void OPPROTO op_xor_T0_1(void) |
|
| 746 |
{
|
|
| 747 |
T0 ^= 1; |
|
| 748 |
} |
|
| 749 |
|
|
| 750 |
void OPPROTO op_set_cc_op(void) |
|
| 751 |
{
|
|
| 752 |
CC_OP = PARAM1; |
|
| 753 |
} |
|
| 754 |
|
|
| 755 |
void OPPROTO op_movl_eflags_T0(void) |
|
| 756 |
{
|
|
| 757 |
CC_SRC = T0; |
|
| 758 |
DF = 1 - (2 * ((T0 >> 10) & 1)); |
|
| 759 |
} |
|
| 760 |
|
|
| 761 |
/* XXX: compute only O flag */ |
|
| 762 |
void OPPROTO op_movb_eflags_T0(void) |
|
| 763 |
{
|
|
| 764 |
int of; |
|
| 765 |
of = cc_table[CC_OP].compute_all() & CC_O; |
|
| 766 |
CC_SRC = T0 | of; |
|
| 767 |
} |
|
| 768 |
|
|
| 769 |
void OPPROTO op_movl_T0_eflags(void) |
|
| 770 |
{
|
|
| 771 |
T0 = cc_table[CC_OP].compute_all(); |
|
| 772 |
T0 |= (DF & DIRECTION_FLAG); |
|
| 773 |
} |
|
| 774 |
|
|
| 775 |
void OPPROTO op_cld(void) |
|
| 776 |
{
|
|
| 777 |
DF = 1; |
|
| 778 |
} |
|
| 779 |
|
|
| 780 |
void OPPROTO op_std(void) |
|
| 781 |
{
|
|
| 782 |
DF = -1; |
|
| 783 |
} |
|
| 784 |
|
|
| 785 |
void OPPROTO op_clc(void) |
|
| 786 |
{
|
|
| 787 |
int eflags; |
|
| 788 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 789 |
eflags &= ~CC_C; |
|
| 790 |
CC_SRC = eflags; |
|
| 791 |
} |
|
| 792 |
|
|
| 793 |
void OPPROTO op_stc(void) |
|
| 794 |
{
|
|
| 795 |
int eflags; |
|
| 796 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 797 |
eflags |= CC_C; |
|
| 798 |
CC_SRC = eflags; |
|
| 799 |
} |
|
| 800 |
|
|
| 801 |
void OPPROTO op_cmc(void) |
|
| 802 |
{
|
|
| 803 |
int eflags; |
|
| 804 |
eflags = cc_table[CC_OP].compute_all(); |
|
| 805 |
eflags ^= CC_C; |
|
| 806 |
CC_SRC = eflags; |
|
| 807 |
} |
|
| 808 |
|
|
| 809 |
static int compute_all_eflags(void) |
|
| 810 |
{
|
|
| 811 |
return CC_SRC; |
|
| 812 |
} |
|
| 813 |
|
|
| 814 |
static int compute_c_eflags(void) |
|
| 815 |
{
|
|
| 816 |
return CC_SRC & CC_C; |
|
| 817 |
} |
|
| 818 |
|
|
| 819 |
static int compute_c_mul(void) |
|
| 820 |
{
|
|
| 821 |
int cf; |
|
| 822 |
cf = (CC_SRC != 0); |
|
| 823 |
return cf; |
|
| 824 |
} |
|
| 825 |
|
|
| 826 |
static int compute_all_mul(void) |
|
| 827 |
{
|
|
| 828 |
int cf, pf, af, zf, sf, of; |
|
| 829 |
cf = (CC_SRC != 0); |
|
| 830 |
pf = 0; /* undefined */ |
|
| 831 |
af = 0; /* undefined */ |
|
| 832 |
zf = 0; /* undefined */ |
|
| 833 |
sf = 0; /* undefined */ |
|
| 834 |
of = cf << 11; |
|
| 835 |
return cf | pf | af | zf | sf | of; |
|
| 836 |
} |
|
| 837 |
|
|
| 838 |
CCTable cc_table[CC_OP_NB] = {
|
|
| 839 |
[CC_OP_DYNAMIC] = { /* should never happen */ },
|
|
| 840 |
|
|
| 841 |
[CC_OP_EFLAGS] = { compute_all_eflags, compute_c_eflags },
|
|
| 842 |
|
|
| 843 |
[CC_OP_MUL] = { compute_all_mul, compute_c_mul },
|
|
| 844 |
|
|
| 845 |
[CC_OP_ADDB] = { compute_all_addb, compute_c_addb },
|
|
| 846 |
[CC_OP_ADDW] = { compute_all_addw, compute_c_addw },
|
|
| 847 |
[CC_OP_ADDL] = { compute_all_addl, compute_c_addl },
|
|
| 848 |
|
|
| 849 |
[CC_OP_SUBB] = { compute_all_subb, compute_c_subb },
|
|
| 850 |
[CC_OP_SUBW] = { compute_all_subw, compute_c_subw },
|
|
| 851 |
[CC_OP_SUBL] = { compute_all_subl, compute_c_subl },
|
|
| 852 |
|
|
| 853 |
[CC_OP_LOGICB] = { compute_all_logicb, compute_c_logicb },
|
|
| 854 |
[CC_OP_LOGICW] = { compute_all_logicw, compute_c_logicw },
|
|
| 855 |
[CC_OP_LOGICL] = { compute_all_logicl, compute_c_logicl },
|
|
| 856 |
|
|
| 857 |
[CC_OP_INCB] = { compute_all_incb, compute_c_incb },
|
|
| 858 |
[CC_OP_INCW] = { compute_all_incw, compute_c_incw },
|
|
| 859 |
[CC_OP_INCL] = { compute_all_incl, compute_c_incl },
|
|
| 860 |
|
|
| 861 |
[CC_OP_DECB] = { compute_all_decb, compute_c_incb },
|
|
| 862 |
[CC_OP_DECW] = { compute_all_decw, compute_c_incw },
|
|
| 863 |
[CC_OP_DECL] = { compute_all_decl, compute_c_incl },
|
|
| 864 |
|
|
| 865 |
[CC_OP_SHLB] = { compute_all_shlb, compute_c_shlb },
|
|
| 866 |
[CC_OP_SHLW] = { compute_all_shlw, compute_c_shlw },
|
|
| 867 |
[CC_OP_SHLL] = { compute_all_shll, compute_c_shll },
|
|
| 868 |
}; |
|
Also available in: Unified diff