diff options
Diffstat (limited to 'security/nss/lib/freebl/ecl/uint128.c')
-rw-r--r-- | security/nss/lib/freebl/ecl/uint128.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/security/nss/lib/freebl/ecl/uint128.c b/security/nss/lib/freebl/ecl/uint128.c deleted file mode 100644 index 5465875ad..000000000 --- a/security/nss/lib/freebl/ecl/uint128.c +++ /dev/null @@ -1,90 +0,0 @@ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -#include "uint128.h" - -/* helper functions */ -uint64_t -mask51(uint128_t x) -{ - return x.lo & MASK51; -} - -uint64_t -mask_lower(uint128_t x) -{ - return x.lo; -} - -uint128_t -mask51full(uint128_t x) -{ - uint128_t ret = { x.lo & MASK51, 0 }; - return ret; -} - -uint128_t -init128x(uint64_t x) -{ - uint128_t ret = { x, 0 }; - return ret; -} - -#define CONSTANT_TIME_CARRY(a, b) \ - ((a ^ ((a ^ b) | ((a - b) ^ b))) >> (sizeof(a) * 8 - 1)) - -/* arithmetic */ - -uint128_t -add128(uint128_t a, uint128_t b) -{ - uint128_t ret; - ret.lo = a.lo + b.lo; - ret.hi = a.hi + b.hi + CONSTANT_TIME_CARRY(ret.lo, b.lo); - return ret; -} - -/* out = 19 * a */ -uint128_t -mul12819(uint128_t a) -{ - uint128_t ret = lshift128(a, 4); - ret = add128(ret, a); - ret = add128(ret, a); - ret = add128(ret, a); - return ret; -} - -uint128_t -mul6464(uint64_t a, uint64_t b) -{ - uint128_t ret; - uint64_t t0 = ((uint64_t)(uint32_t)a) * ((uint64_t)(uint32_t)b); - uint64_t t1 = (a >> 32) * ((uint64_t)(uint32_t)b) + (t0 >> 32); - uint64_t t2 = (b >> 32) * ((uint64_t)(uint32_t)a) + ((uint32_t)t1); - ret.lo = (((uint64_t)((uint32_t)t2)) << 32) + ((uint32_t)t0); - ret.hi = (a >> 32) * (b >> 32); - ret.hi += (t2 >> 32) + (t1 >> 32); - return ret; -} - -/* only defined for n < 64 */ -uint128_t -rshift128(uint128_t x, uint8_t n) -{ - uint128_t ret; - ret.lo = (x.lo >> n) + (x.hi << (64 - n)); - ret.hi = x.hi >> n; - return ret; -} - -/* only defined for n < 64 */ -uint128_t -lshift128(uint128_t x, uint8_t n) -{ - uint128_t ret; - ret.hi = (x.hi << n) + (x.lo >> (64 - n)); - ret.lo = x.lo << n; - return ret; -} |