[llvm-bugs] [Bug 37757] New: [AVX512] Add support for V4FMA instructions

via llvm-bugs llvm-bugs at lists.llvm.org
Sat Jun 9 04:20:15 PDT 2018


            Bug ID: 37757
           Summary: [AVX512] Add support for V4FMA instructions
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: maks at fb.com
                CC: llvm-bugs at lists.llvm.org

E.g. for v4fmaddps:

$ cho 'v4fmaddps 0x0(%rbp),%zmm0,%zmm4' | llvm-mc -assemble -arch=x86-64
-show-encoding -x86-asm-syntax=att -mcpu=knl
<stdin>:1:1: error: invalid instruction mnemonic 'v4fmaddps'
v4fmaddps 0x0(%rbp),%zmm0,%zmm4

$ echo '0x62 0xf2 0x7f 0x48 0x9a 0x65 0x00' | llvm-mc -disassemble -arch=x86-64
-show-encoding -x86-asm-syntax=att -mcpu=knl
<stdin>:1:1: warning: invalid instruction encoding
0x62 0xf2 0x7f 0x48 0x9a 0x65 0x00

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