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[Qemu-discuss] Is SSE2 implemented with hardware support ?

From: 邓尧
Subject: [Qemu-discuss] Is SSE2 implemented with hardware support ?
Date: Wed, 30 Jul 2014 15:14:09 +0800


I need to optimize a Linux program running under qemu-system-i386. qemu is compiled with KVM support. File /proc/cpuinfo in the guest shows that SSE2 is supported.
If SSE2 is backed with host hardware, using SSE2 may improve my program's performance significantly. The host is x86_64 Linux.
My question is: whether sse2 is backed with host hardware ? If it is, how much overhead does an SSE2 instruction have ? (compared with an SSE2 instruction on the host)


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