diff options
Diffstat (limited to 'crypto/src/math')
| -rw-r--r-- | crypto/src/math/raw/Nat.cs | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/crypto/src/math/raw/Nat.cs b/crypto/src/math/raw/Nat.cs index 3bc983430..b3b670954 100644 --- a/crypto/src/math/raw/Nat.cs +++ b/crypto/src/math/raw/Nat.cs @@ -1,5 +1,8 @@ using System; using System.Diagnostics; +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER +using System.Numerics; +#endif using Org.BouncyCastle.Crypto.Utilities; @@ -2737,6 +2740,66 @@ namespace Org.BouncyCastle.Math.Raw } #endif + public static void Xor64(int len, ulong[] x, ulong y, ulong[] z) + { +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + Xor64(len, x.AsSpan(0, len), y, z.AsSpan(0, len)); +#else + for (int i = 0; i < len; ++i) + { + z[i] = x[i] ^ y; + } +#endif + } + + public static void Xor64(int len, ulong[] x, int xOff, ulong y, ulong[] z, int zOff) + { +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + Xor64(len, x.AsSpan(xOff, len), y, z.AsSpan(zOff, len)); +#else + for (int i = 0; i < len; ++i) + { + z[zOff + i] = x[xOff + i] ^ y; + } +#endif + } + +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + public static void Xor64(int len, ReadOnlySpan<ulong> x, ulong y, Span<ulong> z) + { + int i = 0; + if (Vector.IsHardwareAccelerated) + { + var vy = new Vector<ulong>(y); + + int limit = len - Vector<ulong>.Count; + while (i <= limit) + { + var vx = new Vector<ulong>(x[i..]); + (vx ^ vy).CopyTo(z[i..]); + i += Vector<ulong>.Count; + } + } + else + { + int limit = len - 4; + while (i <= limit) + { + z[i + 0] = x[i + 0] ^ y; + z[i + 1] = x[i + 1] ^ y; + z[i + 2] = x[i + 2] ^ y; + z[i + 3] = x[i + 3] ^ y; + i += 4; + } + } + while (i < len) + { + z[i] = x[i] ^ y; + ++i; + } + } +#endif + public static void Xor64(int len, ulong[] x, ulong[] y, ulong[] z) { #if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER |