Bug 197266 - valgrind appears to choke on the xmms instruction "roundsd" on x86_64
Summary: valgrind appears to choke on the xmms instruction "roundsd" on x86_64
Status: RESOLVED FIXED
Alias: None
Product: valgrind
Classification: Developer tools
Component: vex (show other bugs)
Version: 3.4.1
Platform: Ubuntu Linux
: NOR crash
Target Milestone: ---
Assignee: Julian Seward
URL:
Keywords:
: 283743 (view as bug list)
Depends on:
Blocks:
 
Reported: 2009-06-20 14:31 UTC by srp
Modified: 2011-10-11 07:40 UTC (History)
2 users (show)

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Description srp 2009-06-20 14:31:46 UTC 
When gcc (4.3.3-5ubuntu4) compiling my code with "-march=nocana -ffast-math -mfpmath=sse,387" and then running it under valgrind i get the following crash:

    vex amd64->IR: unhandled instruction bytes: 0x66 0xF 0x3A 0xB 0xC0 0x2
    <snip>
    ==18455== Either way, Valgrind will now raise a SIGILL signal which will
    ==18455== probably kill your program.

"66 0f 3a 0b" appears t be the roundsd instruction (from intel manual 2b):

   ROUNDSD — Round Scalar Double Precision Floating-Point Values
   Opcode      Instruction    64-bit Compat/  Description
                              Mode   Leg Mode
   66 0F 3A 0B ROUNDSD xmm1, Valid   Valid    Round the low packed double
   /r ib       xmm2/m64, imm8                 precision floating-point value in
                                              xmm2/m64 and place the result in
                                              xmm1. The rounding mode is
                                              determined by imm8.
Comment 1 Julian Seward 2009-06-21 18:53:09 UTC 
What CPU is this running on?
Comment 2 srp 2009-06-22 02:15:29 UTC 
At the moment core 2 duo (T7600), but it also happened on a xeon box.

sRp

----- Original Message -----
From: "Julian Seward" <jseward@acm.org>
Sent: Sun, June 21, 2009 9:53
Subject:[Bug 197266] valgrind appears to choke on the xmms
instruction"roundsd" on x86_64


https://bugs.kde.org/show_bug.cgi?id=197266





--- Comment #1 from Julian Seward <jseward acm org>  2009-06-21 18:53:09 ---
What CPU is this running on?
Comment 3 Julian Seward 2010-06-25 12:26:27 UTC 
Fixed (vex r1985).
Comment 4 Tom Hughes 2011-10-11 07:40:53 UTC 
*** Bug 283743 has been marked as a duplicate of this bug. ***