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| author | Jan Beulich <jbeulich@suse.com> | 2021-03-23 17:08:39 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2021-03-23 17:08:39 +0100 |
| commit | 441f6aca3923ba65db139f5c2557a5f01e190edc (patch) | |
| tree | 3db030cdeae0a950236523451d774b374f26a274 /opcodes/i386-opc.h | |
| parent | 66848ebca8da38ce395d74d25d604646738514a7 (diff) | |
| download | gdb-441f6aca3923ba65db139f5c2557a5f01e190edc.zip gdb-441f6aca3923ba65db139f5c2557a5f01e190edc.tar.gz gdb-441f6aca3923ba65db139f5c2557a5f01e190edc.tar.bz2 | |
x86: split opcode prefix and opcode space representation
Commit 8b65b8953af2 ("x86: Remove the prefix byte from non-VEX/EVEX
base_opcode") used the opcodeprefix field for two distinct purposes. In
preparation of having VEX/XOP/EVEX and non-VEX templates become similar
in the representatioon of both encoding space and opcode prefixes, split
the field to have a separate one holding an insn's opcode space.
Diffstat (limited to 'opcodes/i386-opc.h')
| -rw-r--r-- | opcodes/i386-opc.h | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/opcodes/i386-opc.h b/opcodes/i386-opc.h index d3f7070..4708d86 100644 --- a/opcodes/i386-opc.h +++ b/opcodes/i386-opc.h @@ -575,7 +575,25 @@ enum #define VEXW1 2 #define VEXWIG 3 VexW, - /* Regular opcode prefix: + /* Opcode encoding space (values chosen to be usable directly in + VEX/XOP mmmmm and EVEX mm fields): + 0: Base opcode space. + 1: 0F opcode prefix / space. + 2: 0F38 opcode prefix / space. + 3: 0F3A opcode prefix / space. + 8: XOP 08 opcode space. + 9: XOP 09 opcode space. + A: XOP 0A opcode space. + */ +#define SPACE_BASE 0 +#define SPACE_0F 1 +#define SPACE_0F38 2 +#define SPACE_0F3A 3 +#define SPACE_XOP08 8 +#define SPACE_XOP09 9 +#define SPACE_XOP0A 0xA + OpcodeSpace, + /* Opcode prefix: 0: None 1: Add 0x66 opcode prefix. 2: Add 0xf2 opcode prefix. @@ -585,20 +603,6 @@ enum #define PREFIX_0X66 1 #define PREFIX_0XF2 2 #define PREFIX_0XF3 3 - /* VEX opcode prefix: - 0: VEX 0x0F opcode prefix. - 1: VEX 0x0F38 opcode prefix. - 2: VEX 0x0F3A opcode prefix - 3: XOP 0x08 opcode prefix. - 4: XOP 0x09 opcode prefix - 5: XOP 0x0A opcode prefix. - */ -#define VEX0F 0 -#define VEX0F38 1 -#define VEX0F3A 2 -#define XOP08 3 -#define XOP09 4 -#define XOP0A 5 OpcodePrefix, /* number of VEX source operands: 0: <= 2 source operands. @@ -742,7 +746,8 @@ typedef struct i386_opcode_modifier unsigned int vex:2; unsigned int vexvvvv:2; unsigned int vexw:2; - unsigned int opcodeprefix:3; + unsigned int opcodespace:4; + unsigned int opcodeprefix:2; unsigned int vexsources:2; unsigned int sib:3; unsigned int sse2avx:1; |