[LLVMbugs] [Bug 23937] New: AVX512: scalar FMA 132/231 instructions are not supported

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23937

            Bug ID: 23937
           Summary: AVX512: scalar FMA 132/231 instructions are not
                    supported
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: ahmed.bougacha at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Consider:

 $ echo '0x62 0xf2 0xf5 0x08 0xa9 0xc2' | ./bin/llvm-mc -disassemble
    .section    __TEXT,__text,regular,pure_instructions
    vfmadd213sd    %xmm2, %xmm1, %xmm0


Replacing 0xa9 (213) with 0xb9 (231) or 0x99 (132) doesn't work:


 $ echo '0x62 0xf2 0xf5 0x08 0x99 0xc2' | ./bin/llvm-mc -disassemble
    .section    __TEXT,__text,regular,pure_instructions
<stdin>:1:1: warning: invalid instruction encoding
0x62 0xf2 0xf5 0x08 0x99 0xc2
^
<stdin>:1:26: warning: invalid instruction encoding
0x62 0xf2 0xf5 0x08 0x99 0xc2
                         ^

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20150624/a81e3b4a/attachment.html>