func math/bits.Sub64

5 uses

	math/bits (current package)
		bits.go#L401: 	d64, b64 := Sub64(uint64(x), uint64(y), uint64(borrow))
		bits.go#L425: func Sub64(x, y, borrow uint64) (diff, borrowOut uint64) {

	math
		fma.go#L149: 		pm2, c = bits.Sub64(pm2, zm2, 0)
		fma.go#L150: 		pm1, _ = bits.Sub64(pm1, zm1, c)

	vendor/golang.org/x/crypto/poly1305
		bits_go1.13.go#L16: 	return bits.Sub64(x, y, borrow)