From cb845b9bc84dada9d03eb9d9cb9ccfa96c7ce06c Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Fri, 10 Oct 2014 22:44:20 +0200
Subject: Implemented AR PoW

---
 pow/ar/ops.go | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 pow/ar/ops.go

(limited to 'pow/ar/ops.go')

diff --git a/pow/ar/ops.go b/pow/ar/ops.go
new file mode 100644
index 000000000..3a099be08
--- /dev/null
+++ b/pow/ar/ops.go
@@ -0,0 +1,54 @@
+package ar
+
+import "math/big"
+
+const lenops int64 = 9
+
+type OpsFunc func(a, b *big.Int) *big.Int
+
+var ops [lenops]OpsFunc
+
+func init() {
+	ops[0] = Add
+	ops[1] = Mul
+	ops[2] = Mod
+	ops[3] = Xor
+	ops[4] = And
+	ops[5] = Or
+	ops[6] = Sub1
+	ops[7] = XorSub
+	ops[8] = Rsh
+}
+
+func Add(x, y *big.Int) *big.Int {
+	return new(big.Int).Add(x, y)
+}
+func Mul(x, y *big.Int) *big.Int {
+	return new(big.Int).Mul(x, y)
+}
+func Mod(x, y *big.Int) *big.Int {
+	return new(big.Int).Mod(x, y)
+}
+func Xor(x, y *big.Int) *big.Int {
+	return new(big.Int).Xor(x, y)
+}
+func And(x, y *big.Int) *big.Int {
+	return new(big.Int).And(x, y)
+}
+func Or(x, y *big.Int) *big.Int {
+	return new(big.Int).Or(x, y)
+}
+func Sub1(x, y *big.Int) *big.Int {
+	a := big.NewInt(-1)
+	a.Sub(a, x)
+
+	return a
+}
+func XorSub(x, y *big.Int) *big.Int {
+	t := Sub1(x, nil)
+
+	return t.Xor(t, y)
+}
+func Rsh(x, y *big.Int) *big.Int {
+	return new(big.Int).Rsh(x, uint(y.Uint64()%64))
+}
-- 
cgit