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KVM: x86 emulator: convert DIV/IDIV to fastop
authorAvi Kivity <avi.kivity@gmail.com>
Sat, 9 Feb 2013 09:31:49 +0000 (11:31 +0200)
committerGleb Natapov <gleb@redhat.com>
Tue, 21 May 2013 12:43:21 +0000 (15:43 +0300)
commitb8c0b6ae498fe5c3f29966bd2a2d9882911b887b
treed3bc70c893d6623f4b1b70edf9cf1419accfea50tree | snapshot
parentb9fa409b00a1ed2a372758fd09f3f5df70f8d59acommit | diff
KVM: x86 emulator: convert DIV/IDIV to fastop

Since DIV and IDIV can generate exceptions, we need an additional output
parameter indicating whether an execption has occured.  To avoid increasing
register pressure on i386, we use %rsi, which is already allocated for
the fastop code pointer.

Gleb: added comment about fop usage as exception indication.

Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
arch/x86/kvm/emulate.c diff | blob | history
Domain: System / Kernel;