update gobgp pkg

vendor/github.com/dgryski/go-farm/farmhashxo.go

@@ -0,0 +1,104 @@
+package farm
+
+import (
+	"encoding/binary"
+	"math/bits"
+)
+
+func h32(s []byte, mul uint64) uint64 {
+	slen := len(s)
+	a := binary.LittleEndian.Uint64(s[0:0+8]) * k1
+	b := binary.LittleEndian.Uint64(s[8 : 8+8])
+	c := binary.LittleEndian.Uint64(s[slen-8:slen-8+8]) * mul
+	d := binary.LittleEndian.Uint64(s[slen-16:slen-16+8]) * k2
+	u := bits.RotateLeft64(a+b, -43) + bits.RotateLeft64(c, -30) + d
+	v := a + bits.RotateLeft64(b+k2, -18) + c
+	a = shiftMix((u ^ v) * mul)
+	b = shiftMix((v ^ a) * mul)
+	return b
+}
+
+func h32Seeds(s []byte, mul, seed0, seed1 uint64) uint64 {
+	slen := len(s)
+	a := binary.LittleEndian.Uint64(s[0:0+8]) * k1
+	b := binary.LittleEndian.Uint64(s[8 : 8+8])
+	c := binary.LittleEndian.Uint64(s[slen-8:slen-8+8]) * mul
+	d := binary.LittleEndian.Uint64(s[slen-16:slen-16+8]) * k2
+	u := bits.RotateLeft64(a+b, -43) + bits.RotateLeft64(c, -30) + d + seed0
+	v := a + bits.RotateLeft64(b+k2, -18) + c + seed1
+	a = shiftMix((u ^ v) * mul)
+	b = shiftMix((v ^ a) * mul)
+	return b
+}
+
+func xohashLen33to64(s []byte) uint64 {
+	slen := len(s)
+	mul0 := k2 - 30
+	mul1 := k2 - 30 + 2*uint64(slen)
+
+	var h0 uint64
+	{
+		s := s[0:32]
+		mul := mul0
+		slen := len(s)
+		a := binary.LittleEndian.Uint64(s[0:0+8]) * k1
+		b := binary.LittleEndian.Uint64(s[8 : 8+8])
+		c := binary.LittleEndian.Uint64(s[slen-8:slen-8+8]) * mul
+		d := binary.LittleEndian.Uint64(s[slen-16:slen-16+8]) * k2
+		u := bits.RotateLeft64(a+b, -43) + bits.RotateLeft64(c, -30) + d
+		v := a + bits.RotateLeft64(b+k2, -18) + c
+		a = shiftMix((u ^ v) * mul)
+		b = shiftMix((v ^ a) * mul)
+		h0 = b
+	}
+
+	var h1 uint64
+	{
+		s := s[slen-32:]
+		mul := mul1
+		slen := len(s)
+		a := binary.LittleEndian.Uint64(s[0:0+8]) * k1
+		b := binary.LittleEndian.Uint64(s[8 : 8+8])
+		c := binary.LittleEndian.Uint64(s[slen-8:slen-8+8]) * mul
+		d := binary.LittleEndian.Uint64(s[slen-16:slen-16+8]) * k2
+		u := bits.RotateLeft64(a+b, -43) + bits.RotateLeft64(c, -30) + d
+		v := a + bits.RotateLeft64(b+k2, -18) + c
+		a = shiftMix((u ^ v) * mul)
+		b = shiftMix((v ^ a) * mul)
+		h1 = b
+	}
+
+	r := ((h1 * mul1) + h0) * mul1
+	return r
+}
+
+func xohashLen65to96(s []byte) uint64 {
+	slen := len(s)
+
+	mul0 := k2 - 114
+	mul1 := k2 - 114 + 2*uint64(slen)
+	h0 := h32(s[:32], mul0)
+	h1 := h32(s[32:64], mul1)
+	h2 := h32Seeds(s[slen-32:], mul1, h0, h1)
+	return (h2*9 + (h0 >> 17) + (h1 >> 21)) * mul1
+}
+
+func Hash64(s []byte) uint64 {
+	slen := len(s)
+
+	if slen <= 32 {
+		if slen <= 16 {
+			return hashLen0to16(s)
+		} else {
+			return hashLen17to32(s)
+		}
+	} else if slen <= 64 {
+		return xohashLen33to64(s)
+	} else if slen <= 96 {
+		return xohashLen65to96(s)
+	} else if slen <= 256 {
+		return naHash64(s)
+	} else {
+		return uoHash64(s)
+	}
+}