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Add symbolic constants for REX_V "classes" (VEX, XOP, ...)

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Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2009-05-08 18:01:21 -07:00
parent 03b9f94133
commit 40b81a40c7
2 changed files with 12 additions and 4 deletions
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8
disasm.c
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@ -1050,7 +1050,7 @@ int32_t disasm(uint8_t *data, char *output, int outbufsize, int segsize,
prefix.vex[1] = *data++;
prefix.rex = REX_V;
prefix.vex_c = 0;
prefix.vex_c = RV_VEX;
if (prefix.vex[0] == 0xc4) {
prefix.vex[2] = *data++;
@ -1066,7 +1066,7 @@ int32_t disasm(uint8_t *data, char *output, int outbufsize, int segsize,
prefix.vex_lp = prefix.vex[1] & 7;
}
ix = itable_vex[0][prefix.vex_m][prefix.vex_lp];
ix = itable_vex[RV_VEX][prefix.vex_m][prefix.vex_lp];
}
end_prefix = true;
break;
@ -1079,7 +1079,7 @@ int32_t disasm(uint8_t *data, char *output, int outbufsize, int segsize,
prefix.vex[2] = *data++;
prefix.rex = REX_V;
prefix.vex_c = 1;
prefix.vex_c = RV_XOP;
prefix.rex |= (~prefix.vex[1] >> 5) & 7; /* REX_RXB */
prefix.rex |= (prefix.vex[2] >> (7-3)) & REX_W;
@ -1087,7 +1087,7 @@ int32_t disasm(uint8_t *data, char *output, int outbufsize, int segsize,
prefix.vex_v = (~prefix.vex[2] >> 3) & 15;
prefix.vex_lp = prefix.vex[2] & 7;
ix = itable_vex[1][prefix.vex_m][prefix.vex_lp];
ix = itable_vex[RV_XOP][prefix.vex_m][prefix.vex_lp];
}
end_prefix = true;
break;

8
nasm.h
View File

@ -601,6 +601,14 @@ enum ccode { /* condition code names */
#define REX_OC 0x0200 /* DREX suffix has the OC0 bit set */
#define REX_V 0x0400 /* Instruction uses VEX/XOP instead of REX */
/*
* REX_V "classes" (prefixes which behave like VEX)
*/
enum vex_class {
RV_VEX = 0, /* C4/C5 */
RV_XOP = 1 /* 8F */
};
/*
* Note that because segment registers may be used as instruction
* prefixes, we must ensure the enumerations for prefixes and