}
func rewriteValueRISCV64_OpRISCV64FMADDS(v *Value) bool {
	v_2 := v.Args[2]
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	// match: (FMADDS neg:(FNEGS x) y z)
	// cond: neg.Uses == 1
	// result: (FNMSUBS x y z)
	for {
		for _i0 := 0; _i0 <= 1; _i0, v_0, v_1 = _i0+1, v_1, v_0 {
			neg := v_0
			if neg.Op != OpRISCV64FNEGS {
				continue
			}
			x := neg.Args[0]
			y := v_1
			z := v_2

(FSUBS a (FMULS  x y)) && a.Block.Func.useFMA(v) => (FMSUBS  a x y)
(FSUBD a (FMULD  x y)) && a.Block.Func.useFMA(v) => (FMSUBD  a x y)
(FSUBS (FMULS  x y) a) && a.Block.Func.useFMA(v) => (FNMSUBS a x y)
(FSUBD (FMULD  x y) a) && a.Block.Func.useFMA(v) => (FNMSUBD a x y)
(FADDS a (FNMULS x y)) && a.Block.Func.useFMA(v) => (FMSUBS  a x y)
(FADDD a (FNMULD x y)) && a.Block.Func.useFMA(v) => (FMSUBD  a x y)