Re: [PATCH v3 0/8] Simplify byte/word opcode pair decode

Marcelo Tosatti
2010-08-26T19:15:30Z

On Thu, Aug 26, 2010 at 11:56:05AM +0300, Avi Kivity wrote:
> Many x86 instructions come in pairs - byte and word variants where bit 0
> of the opcode determines operand size. Use this to simplify the decode
> tables.
>
> Rebased, plus:
>
> Avi Kivity (8):
> KVM: x86 emulator: support byte/word opcode pairs
> KVM: x86 emulator: simplify ALU block (opcodes 00-3F) decode flags
> - v2: fix opcode 25 (AND r/m, imm) to accept a full immediate, not 8-bit
> KVM: x86 emulator: simplify string instruction decode flags
> KVM: x86 emulator: simplify instruction decode flags for opcodes
> 80-8F
> KVM: x86 emulator: simplify instruction decode flags for opcodes
> A0-AF
> KVM: x86 emulator: simplify instruction decode flags for opcodes
> C0-DF
> - v3: fix opcode C1 to accept an 8-bit immediate, not full
> KVM: x86 emulator: simplify instruction decode flags for opcodes
> E0-FF
> KVM: x86 emulator: simplify instruction decode flags for opcodes 0F
> 00-FF
>
> arch/x86/kvm/emulate.c | 89 ++++++++++++++++++++++--------------------------
> 1 files changed, 41 insertions(+), 48 deletions(-)

Applied, thanks.