// FP simplification
(FNEGS  (FMULS  x y)) => (FNMULS x y)
(FNEGD  (FMULD  x y)) => (FNMULD x y)
(FMULS  (FNEGS  x) y) => (FNMULS x y)
(FMULD  (FNEGD  x) y) => (FNMULD x y)
(FNEGS  (FNMULS x y)) => (FMULS  x y)
(FNEGD  (FNMULD x y)) => (FMULD  x y)
(FNMULS (FNEGS  x) y) => (FMULS  x y)
(FNMULD (FNEGD  x) y) => (FMULD  x y)

(FADDS a (FMULS  x y)) && a.Block.Func.useFMA(v) => (FMADDS  a x y)

			v.AddArg3(x, y, a)
			return true
		}
		break
	}
	return false
}
func rewriteValueRISCV64_OpRISCV64FADDS(v *Value) bool {
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	// match: (FADDS a (FMULS x y))
	// cond: a.Block.Func.useFMA(v)
	// result: (FMADDS x y a)
	for {
		for _i0 := 0; _i0 <= 1; _i0, v_0, v_1 = _i0+1, v_1, v_0 {
			a := v_0
			if v_1.Op != OpRISCV64FMULS {
				continue
			}