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| author | Jan Beulich <jbeulich@suse.com> | 2023-02-22 14:12:52 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2023-02-22 14:12:52 +0100 |
| commit | ba25141c1e520f20c210b42fec19823667e83b8e (patch) | |
| tree | 0f01f7ebcfaa1f276c6ff8f594bab0a3958125d4 /opcodes | |
| parent | ad2f44368092a4f111034fc1efc09cfa0de394a5 (diff) | |
| download | gdb-ba25141c1e520f20c210b42fec19823667e83b8e.zip gdb-ba25141c1e520f20c210b42fec19823667e83b8e.tar.gz gdb-ba25141c1e520f20c210b42fec19823667e83b8e.tar.bz2 | |
x86-64: LAR and LSL don't need REX.W
Just like we suppress emitting REX.W for e.g. MOV from/to segment
register, there's also no need for it for LAR and LSL - these can only
ever return 32-bit values and hence always zero-extend their results
anyway.
While there also drop the redundant Word from the first operand of
the second template each - this is already implied by Reg16.
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/i386-opc.tbl | 8 | ||||
| -rw-r--r-- | opcodes/i386-tbl.h | 8 |
2 files changed, 8 insertions, 8 deletions
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl index 5bd7595..464e54a 100644 --- a/opcodes/i386-opc.tbl +++ b/opcodes/i386-opc.tbl @@ -567,16 +567,16 @@ nop, 0x90, 0, NoSuf|RepPrefixOk, {} // Protection control. arpl, 0x63, i286|No64, Modrm|IgnoreSize|No_bSuf|No_lSuf|No_sSuf|No_qSuf, { Reg16, Reg16|Word|Unspecified|BaseIndex } -lar, 0xf02, i286, Modrm|CheckOperandSize|No_bSuf|No_sSuf, { Reg16|Reg32|Reg64, Reg16|Reg32|Reg64 } -lar, 0xf02, i286, Modrm|No_bSuf|No_sSuf, { Reg16|Word|Unspecified|BaseIndex, Reg16|Reg32|Reg64 } +lar, 0xf02, i286, Modrm|CheckOperandSize|No_bSuf|No_sSuf|NoRex64, { Reg16|Reg32|Reg64, Reg16|Reg32|Reg64 } +lar, 0xf02, i286, Modrm|No_bSuf|No_sSuf|NoRex64, { Reg16|Unspecified|BaseIndex, Reg16|Reg32|Reg64 } lgdt, 0xf01/2, i286|No64, Modrm|No_bSuf|No_sSuf|No_qSuf, { Fword|Unspecified|BaseIndex } lgdt, 0xf01/2, x64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|NoRex64, { Tbyte|Unspecified|BaseIndex } lidt, 0xf01/3, i286|No64, Modrm|No_bSuf|No_sSuf|No_qSuf, { Fword|Unspecified|BaseIndex } lidt, 0xf01/3, x64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|NoRex64, { Tbyte|Unspecified|BaseIndex } lldt, 0xf00/2, i286, Modrm|IgnoreSize|No_bSuf|No_lSuf|No_sSuf|No_qSuf, { Reg16|Word|Unspecified|BaseIndex } lmsw, 0xf01/6, i286, Modrm|IgnoreSize|No_bSuf|No_lSuf|No_sSuf|No_qSuf, { Reg16|Word|Unspecified|BaseIndex } -lsl, 0xf03, i286, Modrm|CheckOperandSize|No_bSuf|No_sSuf, { Reg16|Reg32|Reg64, Reg16|Reg32|Reg64 } -lsl, 0xf03, i286, Modrm|No_bSuf|No_sSuf, { Reg16|Word|Unspecified|BaseIndex, Reg16|Reg32|Reg64 } +lsl, 0xf03, i286, Modrm|CheckOperandSize|No_bSuf|No_sSuf|NoRex64, { Reg16|Reg32|Reg64, Reg16|Reg32|Reg64 } +lsl, 0xf03, i286, Modrm|No_bSuf|No_sSuf|NoRex64, { Reg16|Unspecified|BaseIndex, Reg16|Reg32|Reg64 } ltr, 0xf00/3, i286, Modrm|IgnoreSize|No_bSuf|No_lSuf|No_sSuf|No_qSuf, { Reg16|Word|Unspecified|BaseIndex } sgdt, 0xf01/0, i286|No64, Modrm|No_bSuf|No_sSuf|No_qSuf, { Fword|Unspecified|BaseIndex } diff --git a/opcodes/i386-tbl.h b/opcodes/i386-tbl.h index 262a05d..b2d5f2b 100644 --- a/opcodes/i386-tbl.h +++ b/opcodes/i386-tbl.h @@ -4564,7 +4564,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_lar, 0x02, 2, SPACE_0F, None, { 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, @@ -4578,7 +4578,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0 } } } }, { MN_lar, 0x02, 2, SPACE_0F, None, { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, @@ -4664,7 +4664,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_lsl, 0x03, 2, SPACE_0F, None, { 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, @@ -4678,7 +4678,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0 } } } }, { MN_lsl, 0x03, 2, SPACE_0F, None, { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |