[llvm] 3640a58 - [RISCV] Add Commutable flag to XNOR. (#147654)

[via llvm-commits]

Author: Craig Topper
Date: 2025-07-09T07:54:07-07:00
New Revision: 3640a5842be1bf9dcdad72eb1fca97bc66f5b444

URL: https://github.com/llvm/llvm-project/commit/3640a5842be1bf9dcdad72eb1fca97bc66f5b444
DIFF: https://github.com/llvm/llvm-project/commit/3640a5842be1bf9dcdad72eb1fca97bc66f5b444.diff

LOG: [RISCV] Add Commutable flag to XNOR. (#147654)

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVInstrInfoZb.td

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td b/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
index ecda1e6a48053..d2a651444169c 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
@@ -272,7 +272,7 @@ def ANDN  : ALU_rr<0b0100000, 0b111, "andn">,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
 def ORN   : ALU_rr<0b0100000, 0b110, "orn">,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
-def XNOR  : ALU_rr<0b0100000, 0b100, "xnor">,
+def XNOR  : ALU_rr<0b0100000, 0b100, "xnor", Commutable=1>,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
 } // Predicates = [HasStdExtZbbOrZbkb]