}
func rewriteValueRISCV64_OpRISCV64FMSUBD(v *Value) bool {
	v_2 := v.Args[2]
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	// match: (FMSUBD neg:(FNEGD x) y z)
	// cond: neg.Uses == 1
	// result: (FNMADDD 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 != OpRISCV64FNEGD {
				continue
			}
			x := neg.Args[0]
			y := v_1
			z := v_2

(FSUBD a (FNMULD x y)) && a.Block.Func.useFMA(v) => (FMADDD  a x y)
(FSUBS (FNMULS x y) a) && a.Block.Func.useFMA(v) => (FNMADDS a x y)
(FSUBD (FNMULD x y) a) && a.Block.Func.useFMA(v) => (FNMADDD a x y)

(MOVBUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVDconst [int64(read8(sym, int64(off)))])
(MOVHUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVDconst [int64(read16(sym, int64(off), config.ctxt.Arch.ByteOrder))])