KVM: x86 emulator: Add DstAcc operand type

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Add DstAcc operand type. That means that there are 4 bits now for
DstMask.

"In the good old days cpus would have only one register that was able to
 fully participate in arithmetic operations, typically called A for
 Accumulator.  The x86 retains this tradition by having special, shorter
 encodings for the A register (like the cmp opcode), and even some
 instructions that only operate on A (like mul).

 SrcAcc and DstAcc would accommodate these instructions by decoding A
 into the corresponding 'struct operand'."
  -- Avi Kivity

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@qumranet.com>

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Guillaume Thouvenin 2008-09-12 13:50:25 +02:00 • committed by Avi Kivity

parent defed7ed92

commit 9c9fddd0e7

1 changed files with 34 additions and 16 deletions

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arch/x86/kvm/x86_emulate.c

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