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: [email protected]
Reporter: [email protected]
CC: [email protected]
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
^
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