From 900efe200e317649aecbeaa55619a4fc3adb2251 Mon Sep 17 00:00:00 2001 From: Nadav Amit Date: Mon, 30 Mar 2015 15:39:21 +0300 Subject: [PATCH] KVM: x86: BSF and BSR emulation change register unnecassarily If the source of BSF and BSR is zero, the destination register should not change. That is how real hardware behaves. If we set the destination even with the same value that we had before, we may clear bits [63:32] unnecassarily. Signed-off-by: Nadav Amit Message-Id: <1427719163-5429-4-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini --- Reading git-format-patch failed