haskell/cryptonite
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Remove NULL checks in inner loop

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This commit is contained in:
Olivier Chéron 2019-12-29 14:08:37 +01:00
parent b08ce5e3ae
commit 44a1651d26
1 changed files with 2 additions and 0 deletions
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2
cbits/p256/p256.c
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@ -403,6 +403,7 @@ void cryptonite_p256_to_bin(const cryptonite_p256_int* src, uint8_t dst[P256_NBY
// c = a + b mod MOD // c = a + b mod MOD
void cryptonite_p256e_modadd(const cryptonite_p256_int* MOD, const cryptonite_p256_int* a, const cryptonite_p256_int* b, cryptonite_p256_int* c) { void cryptonite_p256e_modadd(const cryptonite_p256_int* MOD, const cryptonite_p256_int* a, const cryptonite_p256_int* b, cryptonite_p256_int* c) {
assert(c); /* avoid repeated checks inside inlined cryptonite_p256_add */
cryptonite_p256_digit top = cryptonite_p256_add(a, b, c); cryptonite_p256_digit top = cryptonite_p256_add(a, b, c);
top = subM(MOD, top, P256_DIGITS(c), -1); top = subM(MOD, top, P256_DIGITS(c), -1);
top = subM(MOD, top, P256_DIGITS(c), MSB_COMPLEMENT(top)); top = subM(MOD, top, P256_DIGITS(c), MSB_COMPLEMENT(top));
@ -411,6 +412,7 @@ void cryptonite_p256e_modadd(const cryptonite_p256_int* MOD, const cryptonite_p2
// c = a - b mod MOD // c = a - b mod MOD
void cryptonite_p256e_modsub(const cryptonite_p256_int* MOD, const cryptonite_p256_int* a, const cryptonite_p256_int* b, cryptonite_p256_int* c) { void cryptonite_p256e_modsub(const cryptonite_p256_int* MOD, const cryptonite_p256_int* a, const cryptonite_p256_int* b, cryptonite_p256_int* c) {
assert(c); /* avoid repeated checks inside inlined cryptonite_p256_sub */
cryptonite_p256_digit top = cryptonite_p256_sub(a, b, c); cryptonite_p256_digit top = cryptonite_p256_sub(a, b, c);
top = addM(MOD, top, P256_DIGITS(c), ~MSB_COMPLEMENT(top)); top = addM(MOD, top, P256_DIGITS(c), ~MSB_COMPLEMENT(top));
top = subM(MOD, top, P256_DIGITS(c), MSB_COMPLEMENT(top)); top = subM(MOD, top, P256_DIGITS(c), MSB_COMPLEMENT(top));