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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-03-10 13:51:28 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-03-10 13:51:28 +0700 |
| commit | 44da462ba03951c22b1fa552f4d74b1a69882197 (patch) | |
| tree | 15c0c88305e64b0e192d0f61053b1c8c50d26374 /crypto/src/math/ec/custom/sec/SecP256R1Field.cs | |
| parent | Inline Reduce32 calls and registerize some values to avoid extra writes (diff) | |
| download | BouncyCastle.NET-ed25519-44da462ba03951c22b1fa552f4d74b1a69882197.tar.xz | |
Refactor temporary variables in reductions
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP256R1Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecP256R1Field.cs | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs index aeb6f52fc..1ae07f341 100644 --- a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs +++ b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs @@ -88,18 +88,18 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec long xx08 = xx[8], xx09 = xx[9], xx10 = xx[10], xx11 = xx[11]; long xx12 = xx[12], xx13 = xx[13], xx14 = xx[14], xx15 = xx[15]; + const long n = 6; + + xx08 -= n; + long t0 = xx08 + xx09; long t1 = xx09 + xx10; - long t2 = xx10 + xx11; + long t2 = xx10 + xx11 - xx15; long t3 = xx11 + xx12; long t4 = xx12 + xx13; long t5 = xx13 + xx14; long t6 = xx14 + xx15; - const long n = 6; - - t0 -= n; - long cc = 0; cc += (long)xx[0] + t0 - t3 - t5; z[0] = (uint)cc; @@ -107,7 +107,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec cc += (long)xx[1] + t1 - t4 - t6; z[1] = (uint)cc; cc >>= 32; - cc += (long)xx[2] + t2 - t5 - xx15; + cc += (long)xx[2] + t2 - t5; z[2] = (uint)cc; cc >>= 32; cc += (long)xx[3] + (t3 << 1) + xx13 - xx15 - t0; @@ -116,13 +116,13 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec cc += (long)xx[4] + (t4 << 1) + xx14 - t1; z[4] = (uint)cc; cc >>= 32; - cc += (long)xx[5] + (t5 << 1) + xx15 - t2; + cc += (long)xx[5] + (t5 << 1) - t2; z[5] = (uint)cc; cc >>= 32; cc += (long)xx[6] + (t6 << 1) + t5 - t0; z[6] = (uint)cc; cc >>= 32; - cc += (long)xx[7] + (xx15 << 1) + xx15 + xx08 - t2 - t4 - n; + cc += (long)xx[7] + (xx15 << 1) + xx08 - t2 - t4; z[7] = (uint)cc; cc >>= 32; cc += n; |