Bug 291924

Summary:	vex x86->IR: unhandled instruction bytes: 0x66 0xF 0x38 0x31 (pmovzxbd)
Product:	[Developer tools] valgrind	Reporter:	Mathieu Carrier <mat.carrier+digikam>
Component:	vex	Assignee:	Josef Weidendorfer <josef.weidendorfer>
Status:	RESOLVED INTENTIONAL
Severity:	crash	CC:	jseward, rhyskidd, timurrrr
Priority:	NOR
Version:	3.7.0
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=332917
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Mathieu Carrier 2012-01-19 07:10:11 UTC

Hello,
I have a problem with a SSE4.1 instruction leading to crash with:
vex x86->IR: unhandled instruction bytes: 0x66 0xF 0x38 0x31
==3224== valgrind: Unrecognised instruction at address 0x8049825
This address corresponds to:
8049825:       66 0f 38 31 c0          pmovzxbd %xmm0,%xmm0
This assembler instructions provides from _mm_cvtepu8_epi32 call.
Best regards.

Comment 1 Josef Weidendorfer 2012-01-20 19:30:38 UTC

This is not callgrind related (ie. all the tools should have the same
issue). Moved to "vex" component.

Comment 2 Julian Seward 2012-01-26 11:43:49 UTC

SSE4 isn't supported in 32 bit mode, only 64 bit mode.  32 bit mode
supports only up to and including SSSE3.

Comment 3 Mathieu Carrier 2012-01-26 13:03:31 UTC

Do SSE4 will be supported in a future release of 32-bits version or not at all ?

Comment 4 Julian Seward 2012-07-04 17:26:00 UTC

There are no current plans to support SSE4 on 32-bit.  Please use 64-bit.

Comment 5 Timur Iskhodzhanov 2014-04-01 16:58:33 UTC

See also bug 332917.

Comment 6 Rhys Kidd 2015-05-31 23:57:17 UTC

pmovzxbd is an SSE4.1 instruction.
SSE4 isn't supported in 32 bit mode, only 64 bit mode.  32 bit mode supports only up to and including SSSE3.
http://www.valgrind.org/docs/manual/manual-core.html#manual-core.limits

There are no current plans to support SSE4 on 32-bit.  Please use 64-bit.