1 files changed, 38 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go b/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
index ebd515b7fc..f64319230b 100644
--- a/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
@@ -240,6 +240,44 @@ func init() {
 		{name: "CALLclosure", argLength: 3, reg: callClosure, aux: "CallOff", call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem
 		{name: "CALLinter", argLength: 2, reg: callInter, aux: "CallOff", call: true},     // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem
 
+		// duffzero
+		// arg0 = address of memory to zero (in X10, changed as side effect)
+		// arg1 = mem
+		// auxint = offset into duffzero code to start executing
+		// X1 (link register) changed because of function call
+		// returns mem
+		{
+			name:      "DUFFZERO",
+			aux:       "Int64",
+			argLength: 2,
+			reg: regInfo{
+				inputs:   []regMask{regNamed["X10"]},
+				clobbers: regNamed["X1"] | regNamed["X10"],
+			},
+			typ:            "Mem",
+			faultOnNilArg0: true,
+		},
+
+		// duffcopy
+		// arg0 = address of dst memory (in X11, changed as side effect)
+		// arg1 = address of src memory (in X10, changed as side effect)
+		// arg2 = mem
+		// auxint = offset into duffcopy code to start executing
+		// X1 (link register) changed because of function call
+		// returns mem
+		{
+			name:      "DUFFCOPY",
+			aux:       "Int64",
+			argLength: 3,
+			reg: regInfo{
+				inputs:   []regMask{regNamed["X11"], regNamed["X10"]},
+				clobbers: regNamed["X1"] | regNamed["X10"] | regNamed["X11"],
+			},
+			typ:            "Mem",
+			faultOnNilArg0: true,
+			faultOnNilArg1: true,
+		},
+
 		// Generic moves and zeros
 
 		// general unaligned zeroing