diff options
Diffstat (limited to 'gas/config/tc-i386.h')
| -rw-r--r-- | gas/config/tc-i386.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gas/config/tc-i386.h b/gas/config/tc-i386.h index 78c7ad3595..e55d5cad5e 100644 --- a/gas/config/tc-i386.h +++ b/gas/config/tc-i386.h @@ -153,6 +153,33 @@ modrm_byte; /* x86-64 extension prefix. */ typedef int rex_byte; +/* The SSE5 instructions have a two bit instruction modifier (OC) that + is stored in two separate bytes in the instruction. Pick apart OC + into the 2 separate bits for instruction. */ +#define DREX_OC0(x) (((x) & 1) != 0) +#define DREX_OC1(x) (((x) & 2) != 0) + +#define DREX_OC0_MASK (1 << 3) /* set OC0 in byte 4 */ +#define DREX_OC1_MASK (1 << 2) /* set OC1 in byte 3 */ + +/* OC mappings */ +#define DREX_XMEM_X1_X2_X2 0 /* 4 op insn, dest = src3, src1 = reg/mem */ +#define DREX_X1_XMEM_X2_X2 1 /* 4 op insn, dest = src3, src2 = reg/mem */ +#define DREX_X1_XMEM_X2_X1 2 /* 4 op insn, dest = src1, src2 = reg/mem */ +#define DREX_X1_X2_XMEM_X1 3 /* 4 op insn, dest = src1, src3 = reg/mem */ + +#define DREX_XMEM_X1_X2 0 /* 3 op insn, src1 = reg/mem */ +#define DREX_X1_XMEM_X2 1 /* 3 op insn, src1 = reg/mem */ + +/* Information needed to create the DREX byte in SSE5 instructions. */ +typedef struct +{ + unsigned int reg; /* register */ + unsigned int rex; /* REX flags */ + unsigned int modrm_reg; /* which arg goes in the modrm.reg field */ + unsigned int modrm_regmem; /* which arg goes in the modrm.regmem field */ +} drex_byte; + /* 386 opcode byte to code indirect addressing. */ typedef struct { |