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| author | Jan Beulich <jbeulich@novell.com> | 2016-07-01 09:01:41 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2016-07-01 09:01:41 +0200 |
| commit | c07315e0c610e0e3317b4c02266f81793df253d2 (patch) | |
| tree | 5f1eefeefc8e0af00809dc03fcd28816395e7bef /opcodes/i386-opc.tbl | |
| parent | 9243100aef7486524f1a7f87bbd2cce1fe980b75 (diff) | |
| download | gdb-c07315e0c610e0e3317b4c02266f81793df253d2.zip gdb-c07315e0c610e0e3317b4c02266f81793df253d2.tar.gz gdb-c07315e0c610e0e3317b4c02266f81793df253d2.tar.bz2 | |
x86: allow suffix-less movzw and 64-bit movzb
... just like is already the case for 16- and 32-bit movzb: I can't see
why omitting suffixes on this (and movs{b,w,l}) is not allowed, when it
is allowed for all other instructions where the suffix is redundant
with (one of) the operands.
Diffstat (limited to 'opcodes/i386-opc.tbl')
| -rw-r--r-- | opcodes/i386-opc.tbl | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl index bd97c0e..161bc08 100644 --- a/opcodes/i386-opc.tbl +++ b/opcodes/i386-opc.tbl @@ -74,18 +74,9 @@ movsx, 2, 0xfbf, None, 2, Cpu386, Modrm|No_bSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf movsx, 2, 0x63, None, 1, Cpu64, Modrm|No_bSuf|No_wSuf|No_sSuf|No_qSuf|No_ldSuf|Rex64|IntelSyntax, { Reg32|Dword|BaseIndex|Disp8|Disp32|Disp32S, Reg64 } movsxd, 2, 0x63, None, 1, Cpu64, Modrm|No_bSuf|No_wSuf|No_sSuf|No_qSuf|No_ldSuf|Rex64, { Reg32|Dword|Unspecified|BaseIndex|Disp8|Disp32|Disp32S, Reg64 } -// Move with zero extend. We can't remove "movzb" since existing -// assembly codes may use it. -movzb, 2, 0xfb6, None, 2, Cpu386, Modrm|No_bSuf|No_sSuf|No_qSuf|No_ldSuf, { Reg8|Byte|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg16|Reg32|Reg64 } -// "movzbl" & "movzbw" should not be unified into "movzb" for -// consistency with the sign extending moves above. -movzbl, 2, 0xfb6, None, 2, Cpu386, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { Reg8|Byte|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg32 } -movzbw, 2, 0xfb6, None, 2, Cpu386, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { Reg8|Byte|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg16 } -movzwl, 2, 0xfb7, None, 2, Cpu386, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { Reg16|Word|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg32 } -// These instructions are not particulary useful, since the zero extend -// 32->64 is implicit, but we can encode them. -movzbq, 2, 0xfb6, None, 2, Cpu64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|Rex64, { Reg8|Byte|Unspecified|BaseIndex|Disp8|Disp32|Disp32S, Reg64 } -movzwq, 2, 0xfb7, None, 2, Cpu64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|Rex64, { Reg16|Word|Unspecified|BaseIndex|Disp8|Disp32|Disp32S, Reg64 } +// Move with zero extend. +movzb, 2, 0xfb6, None, 2, Cpu386, Modrm|No_bSuf|No_sSuf|No_ldSuf, { Reg8|Byte|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg16|Reg32|Reg64 } +movzw, 2, 0xfb7, None, 2, Cpu386, Modrm|No_bSuf|No_wSuf|No_sSuf|No_ldSuf, { Reg16|Word|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg32|Reg64 } // Intel Syntax next 2 insns (the 64-bit variants are not particulary // useful since the zero extend 32->64 is implicit, but we can encode them). movzx, 2, 0xfb6, None, 2, Cpu386, Modrm|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|ATTSyntax, { Reg8|Unspecified|BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg16|Reg32|Reg64 } |