diff --git a/src/cmd/compile/internal/loong64/ssa.go b/src/cmd/compile/internal/loong64/ssa.go
index d60aef165c..03d7a1082a 100644
--- a/src/cmd/compile/internal/loong64/ssa.go
+++ b/src/cmd/compile/internal/loong64/ssa.go
@@ -276,7 +276,6 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 		ssa.OpLOONG64ANDconst,
 		ssa.OpLOONG64ORconst,
 		ssa.OpLOONG64XORconst,
-		ssa.OpLOONG64NORconst,
 		ssa.OpLOONG64SLLconst,
 		ssa.OpLOONG64SLLVconst,
 		ssa.OpLOONG64SRLconst,
@@ -293,6 +292,23 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 		p.Reg = v.Args[0].Reg()
 		p.To.Type = obj.TYPE_REG
 		p.To.Reg = v.Reg()
+
+	case ssa.OpLOONG64NORconst:
+		// MOVV $const, Rtmp
+		// NOR  Rtmp, Rarg0, Rout
+		p := s.Prog(loong64.AMOVV)
+		p.From.Type = obj.TYPE_CONST
+		p.From.Offset = v.AuxInt
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = loong64.REGTMP
+
+		p2 := s.Prog(v.Op.Asm())
+		p2.From.Type = obj.TYPE_REG
+		p2.From.Reg = loong64.REGTMP
+		p2.Reg = v.Args[0].Reg()
+		p2.To.Type = obj.TYPE_REG
+		p2.To.Reg = v.Reg()
+
 	case ssa.OpLOONG64MOVVconst:
 		r := v.Reg()
 		p := s.Prog(v.Op.Asm())
diff --git a/test/codegen/bits.go b/test/codegen/bits.go
index c20e4d6733..95e0ed85e4 100644
--- a/test/codegen/bits.go
+++ b/test/codegen/bits.go
@@ -335,6 +335,15 @@ func op_orn(x, y uint32) uint32 {
 	return x | ^y
 }
 
+func op_nor(x int64, a []int64) {
+	// loong64: "MOVV\t[$]0","NOR\tR"
+	a[0] = ^(0x1234 | x)
+	// loong64:"NOR",-"XOR"
+	a[1] = (-1) ^ x
+	// loong64: "MOVV\t[$]-55",-"OR",-"NOR"
+	a[2] = ^(0x12 | 0x34)
+}
+
 // check bitsets
 func bitSetPowerOf2Test(x int) bool {
 	// amd64:"BTL\t[$]3"