[LLVMbugs] [Bug 7588] New: Wrong code for _mm_shufflehi_epi16

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7588

           Summary: Wrong code for _mm_shufflehi_epi16
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Headers
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: astrange at ithinksw.com
                CC: llvmbugs at cs.uiuc.edu


Using checker-243 -O3 -m32 -march=pentium-m.

Source:
#include <xmmintrin.h>

__m128i a(__m128i b)
{
    return _mm_shufflehi_epi16(b, 1 | (0 << 2) | (3 << 4) | (2 << 6));
}

gcc:
_a:
    pushl    %ebp
    movl    %esp, %ebp
    subl    $8, %esp
    pshufhw    $177, %xmm0, %xmm0
    leave
    ret

clang:
_a:                                     ## @a
## BB#0:                                ## %entry
    pushl    %ebp
    movl    %esp, %ebp
    pextrw    $5, %xmm0, %eax
    movlhps    %xmm0, %xmm0
    pshufhw    $-76, %xmm0, %xmm0
    pinsrw    $4, %eax, %xmm0
    popl    %ebp
    ret

It looks like the macro definition in xmmintrin is wrong.

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