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From: | Andriy Gapon |
Subject: | [Qemu-devel] bug in popcnt emulation with some register operand(s)? |
Date: | Mon, 08 Oct 2012 02:12:53 +0300 |
User-agent: | Mozilla/5.0 (X11; FreeBSD amd64; rv:15.0) Gecko/20120913 Thunderbird/15.0.1 |
I am running Qemu (plain, no kvm, etc) on an AMD 10h machine that provides popcnt instruction. Qemu advertises availability of pocnt to a guest as well. What I see in the guest that popcnt 0x20(%r12),%r8 instruction actually placed its result into %rax. With %rdi and %rax operands the instruction worked fine though. -- Andriy Gapon
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