diff options
Diffstat (limited to 'llvm/lib/Target/ARM64/ARM64InstrFormats.td')
| -rw-r--r-- | llvm/lib/Target/ARM64/ARM64InstrFormats.td | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM64/ARM64InstrFormats.td b/llvm/lib/Target/ARM64/ARM64InstrFormats.td index 16db02ed275..00658edefa5 100644 --- a/llvm/lib/Target/ARM64/ARM64InstrFormats.td +++ b/llvm/lib/Target/ARM64/ARM64InstrFormats.td @@ -1200,9 +1200,13 @@ class MulHi<bits<3> opc, string asm, SDNode OpNode> let Inst{31-24} = 0b10011011; let Inst{23-21} = opc; let Inst{20-16} = Rm; - let Inst{15-10} = 0b011111; + let Inst{15} = 0; let Inst{9-5} = Rn; let Inst{4-0} = Rd; + + // The Ra field of SMULH and UMULH is unused: it should be assembled as 31 + // (i.e. all bits 1) but is ignored by the processor. + let PostEncoderMethod = "fixMulHigh"; } class MulAccumWAlias<string asm, Instruction inst> |
