diff --git a/src/cmd/compile/internal/ssa/gen/PPC64.rules b/src/cmd/compile/internal/ssa/gen/PPC64.rules
index d8041e810f..761ffa2f95 100644
--- a/src/cmd/compile/internal/ssa/gen/PPC64.rules
+++ b/src/cmd/compile/internal/ssa/gen/PPC64.rules
@@ -785,7 +785,7 @@
 (FMOVDstore [off] {sym} ptr (MTVSRD x) mem) => (MOVDstore [off] {sym} ptr x mem)
 (MOVDstore [off] {sym} ptr (MFVSRD x) mem) => (FMOVDstore [off] {sym} ptr x mem)
 
-(MTVSRD (MOVDconst [c])) => (FMOVDconst [math.Float64frombits(uint64(c))])
+(MTVSRD (MOVDconst [c])) && !math.IsNaN(math.Float64frombits(uint64(c))) => (FMOVDconst [math.Float64frombits(uint64(c))])
 (MFVSRD (FMOVDconst [c])) => (MOVDconst [int64(math.Float64bits(c))])
 
 (MTVSRD x:(MOVDload [off] {sym} ptr mem)) && x.Uses == 1 && clobber(x) => @x.Block (FMOVDload [off] {sym} ptr mem)
diff --git a/src/cmd/compile/internal/ssa/rewritePPC64.go b/src/cmd/compile/internal/ssa/rewritePPC64.go
index 0b798c6a72..6a2c164fe0 100644
--- a/src/cmd/compile/internal/ssa/rewritePPC64.go
+++ b/src/cmd/compile/internal/ssa/rewritePPC64.go
@@ -10314,12 +10314,16 @@ func rewriteValuePPC64_OpPPC64MTVSRD(v *Value) bool {
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (MTVSRD (MOVDconst [c]))
+	// cond: !math.IsNaN(math.Float64frombits(uint64(c)))
 	// result: (FMOVDconst [math.Float64frombits(uint64(c))])
 	for {
 		if v_0.Op != OpPPC64MOVDconst {
 			break
 		}
 		c := auxIntToInt64(v_0.AuxInt)
+		if !(!math.IsNaN(math.Float64frombits(uint64(c)))) {
+			break
+		}
 		v.reset(OpPPC64FMOVDconst)
 		v.AuxInt = float64ToAuxInt(math.Float64frombits(uint64(c)))
 		return true