]> git.baikalelectronics.ru Git - kernel.git/commit
KVM: x86 emulator: decode extended accumulator explicity
authorAvi Kivity <avi.kivity@gmail.com>
Sat, 9 Feb 2013 09:31:45 +0000 (11:31 +0200)
committerGleb Natapov <gleb@redhat.com>
Tue, 21 May 2013 12:43:16 +0000 (15:43 +0300)
commit013d780ef4c9595755943e61d548ed3f30afb42d
treea9e4a3c869df5f87c43a63601e119a4f3af317fe
parent83fc619d768e37f9554ed8d60c3aeb5b78c2259c
KVM: x86 emulator: decode extended accumulator explicity

Single-operand MUL and DIV access an extended accumulator: AX for byte
instructions, and DX:AX, EDX:EAX, or RDX:RAX for larger-sized instructions.
Add support for fetching the extended accumulator.

In order not to change things too much, RDX is loaded into Src2, which is
already loaded by fastop().  This avoids increasing register pressure on
i386.

Gleb: disable src writeback for ByteOp div/mul.

Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
arch/x86/kvm/emulate.c