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minor improvement.

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NIIBE Yutaka
2014-04-16 21:07:11 +09:00
parent 272875ee76
commit 4f1343e154
1 changed files with 4 additions and 10 deletions
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14
src/mod25638.c
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@@ -100,13 +100,10 @@ void
mod25638_add (bn256 *X, const bn256 *A, const bn256 *B)
{
uint32_t carry;
bn256 tmp[1];
carry = bn256_add (X, A, B);
if (carry)
bn256_sub (X, X, n25638);
else
bn256_sub (tmp, X, n25638);
carry = bn256_add_uint (X, X, carry*38);
X->word[0] += carry * 38;
}
/**
@@ -116,13 +113,10 @@ void
mod25638_sub (bn256 *X, const bn256 *A, const bn256 *B)
{
uint32_t borrow;
bn256 tmp[1];
borrow = bn256_sub (X, A, B);
if (borrow)
bn256_add (X, X, n25638);
else
bn256_add (tmp, X, n25638);
borrow = bn256_sub_uint (X, X, borrow*38);
X->word[0] -= borrow * 38;
}