diff --git a/crypto/src/math/ec/custom/sec/SecT571Field.cs b/crypto/src/math/ec/custom/sec/SecT571Field.cs
index 5a393409a..49eaae2d4 100644
--- a/crypto/src/math/ec/custom/sec/SecT571Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecT571Field.cs
@@ -19,18 +19,12 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void Add(ulong[] x, ulong[] y, ulong[] z)
{
- for (int i = 0; i < 9; ++i)
- {
- z[i] = x[i] ^ y[i];
- }
+ Nat.Xor64(9, x, y, z);
}
private static void Add(ulong[] x, int xOff, ulong[] y, int yOff, ulong[] z, int zOff)
{
- for (int i = 0; i < 9; ++i)
- {
- z[zOff + i] = x[xOff + i] ^ y[yOff + i];
- }
+ Nat.Xor64(9, x, xOff, y, yOff, z, zOff);
}
public static void AddBothTo(ulong[] x, ulong[] y, ulong[] z)
@@ -51,10 +45,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddExt(ulong[] xx, ulong[] yy, ulong[] zz)
{
- for (int i = 0; i < 18; ++i)
- {
- zz[i] = xx[i] ^ yy[i];
- }
+ Nat.Xor64(18, xx, yy, zz);
}
public static void AddOne(ulong[] x, ulong[] z)
@@ -68,10 +59,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
private static void AddTo(ulong[] x, ulong[] z)
{
- for (int i = 0; i < 9; ++i)
- {
- z[i] ^= x[i];
- }
+ Nat.XorTo64(9, x, z);
}
public static ulong[] FromBigInteger(BigInteger x)
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