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[LLVM][AArch64]CFINV - Add UNPREDICTABLE behaviour if CRm is not zero #140593

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Merged
merged 1 commit into from
May 20, 2025
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[LLVM][AArch64]CFINV - Add UNPREDICTABLE behaviour if CRm is not zero #140593

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1 change: 1 addition & 0 deletions llvm/lib/Target/AArch64/AArch64InstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -2096,6 +2096,7 @@ def FJCVTZS : BaseFPToIntegerUnscaled<0b01, 0b11, 0b110, FPR64, GPR32,
let Predicates = [HasFlagM], Defs = [NZCV], Uses = [NZCV] in {
def CFINV : SimpleSystemI<0, (ins), "cfinv", "">, Sched<[WriteSys]> {
let Inst{20-5} = 0b0000001000000000;
let Unpredictable{11-8} = 0b1111;
}
def SETF8 : BaseFlagManipulation<0, 0, (ins GPR32:$Rn), "setf8", "{\t$Rn}">;
def SETF16 : BaseFlagManipulation<0, 1, (ins GPR32:$Rn), "setf16", "{\t$Rn}">;
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2 changes: 2 additions & 0 deletions llvm/test/MC/Disassembler/AArch64/armv8.4a-flag.txt
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Expand Up @@ -2,10 +2,12 @@
# RUN: llvm-mc -triple aarch64-none-linux-gnu -mattr=+v8r --disassemble < %s | FileCheck %s

[0x1f,0x40,0x00,0xd5]
[0x1f,0x4f,0x00,0xd5]
[0x2d,0x08,0x00,0x3a]
[0x2d,0x48,0x00,0x3a]
[0x2f,0x84,0x1f,0xba]

#CHECK: cfinv
#CHECK: cfinv
#CHECK: setf8 w1
#CHECK: setf16 w1
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