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[Qemu-devel] [Bug 1469342] Re: qemu-i386 pentium3/athlon incorrect instr


From: PeteVine
Subject: [Qemu-devel] [Bug 1469342] Re: qemu-i386 pentium3/athlon incorrect instruction set
Date: Fri, 25 Sep 2015 22:47:42 -0000

I think I may have found the culprit - athlon is defined as
'PPRO_FEATURES + some additional features'.

If  PPRO_FEATURES is what I think it is (pentium pro) why does it have
SSE and SSE2 defined? It should end with MMX.

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https://bugs.launchpad.net/bugs/1469342

Title:
  qemu-i386 pentium3/athlon incorrect instruction set

Status in QEMU:
  Won't Fix

Bug description:
  Running a binary containing a movsd instruction (SSE2) in 32-bit
  qemu-i386 from 20150609 using the -cpu pentium3 switch results in
  flawless execution whereas it should crash with SIGILL as P3 only had
  SSE and not SSE2.

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