diff options
Diffstat (limited to 'absl/random/internal/randen_hwaes.cc')
| -rw-r--r-- | absl/random/internal/randen_hwaes.cc | 48 |
1 files changed, 16 insertions, 32 deletions
diff --git a/absl/random/internal/randen_hwaes.cc b/absl/random/internal/randen_hwaes.cc index 7d5b2b7..6cc36fd 100644 --- a/absl/random/internal/randen_hwaes.cc +++ b/absl/random/internal/randen_hwaes.cc @@ -159,13 +159,11 @@ inline ABSL_TARGET_CRYPTO Vector128 ReverseBytes(const Vector128& v) { // WARNING: these load/store in native byte order. It is OK to load and then // store an unchanged vector, but interpreting the bits as a number or input // to AES will have undefined results. -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return vec_vsx_ld(0, reinterpret_cast<const Vector128*>(from)); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { vec_vsx_st(v, 0, reinterpret_cast<Vector128*>(to)); } @@ -177,8 +175,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, } // Enables native loads in the round loop by pre-swapping. -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t* state) { using absl::random_internal::RandenTraits; constexpr size_t kLanes = 2; constexpr size_t kFeistelBlocks = RandenTraits::kFeistelBlocks; @@ -230,13 +227,11 @@ using Vector128 = uint8x16_t; namespace { -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return vld1q_u8(reinterpret_cast<const uint8_t*>(from)); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { vst1q_u8(reinterpret_cast<uint8_t*>(to), v); } @@ -254,8 +249,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key; } -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT) {} +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t*) {} } // namespace @@ -283,15 +277,12 @@ class Vector128 { __m128i data_; }; -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return Vector128(_mm_load_si128(reinterpret_cast<const __m128i*>(from))); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { - _mm_store_si128(reinterpret_cast<__m128i * ABSL_RANDOM_INTERNAL_RESTRICT>(to), - v.data()); +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { + _mm_store_si128(reinterpret_cast<__m128i*>(to), v.data()); } // One round of AES. "round_key" is a public constant for breaking the @@ -304,8 +295,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, return Vector128(_mm_aesenc_si128(state.data(), round_key.data())); } -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT) {} +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t*) {} } // namespace @@ -402,8 +392,7 @@ constexpr size_t kLanes = 2; // Block shuffles applies a shuffle to the entire state between AES rounds. // Improved odd-even shuffle from "New criterion for diffusion property". -inline ABSL_TARGET_CRYPTO void BlockShuffle( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { +inline ABSL_TARGET_CRYPTO void BlockShuffle(uint64_t* state) { static_assert(kFeistelBlocks == 16, "Expecting 16 FeistelBlocks."); constexpr size_t shuffle[kFeistelBlocks] = {7, 2, 13, 4, 11, 8, 3, 6, @@ -452,8 +441,7 @@ inline ABSL_TARGET_CRYPTO void BlockShuffle( // parallel hides the 7-cycle AESNI latency on HSW. Note that the Feistel // XORs are 'free' (included in the second AES instruction). inline ABSL_TARGET_CRYPTO const u64x2* FeistelRound( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state, - const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) { + uint64_t* state, const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) { static_assert(kFeistelBlocks == 16, "Expecting 16 FeistelBlocks."); // MSVC does a horrible job at unrolling loops. @@ -513,8 +501,7 @@ inline ABSL_TARGET_CRYPTO const u64x2* FeistelRound( // 2^64 queries if the round function is a PRF. This is similar to the b=8 case // of Simpira v2, but more efficient than its generic construction for b=16. inline ABSL_TARGET_CRYPTO void Permute( - const void* ABSL_RANDOM_INTERNAL_RESTRICT keys, - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { + const void* ABSL_RANDOM_INTERNAL_RESTRICT keys, uint64_t* state) { const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys128 = static_cast<const u64x2*>(keys); @@ -544,10 +531,8 @@ const void* ABSL_TARGET_CRYPTO RandenHwAes::GetKeys() { // NOLINTNEXTLINE void ABSL_TARGET_CRYPTO RandenHwAes::Absorb(const void* seed_void, void* state_void) { - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state = - reinterpret_cast<uint64_t*>(state_void); - const uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT seed = - reinterpret_cast<const uint64_t*>(seed_void); + auto* state = static_cast<uint64_t*>(state_void); + const auto* seed = static_cast<const uint64_t*>(seed_void); constexpr size_t kCapacityBlocks = kCapacityBytes / sizeof(Vector128); constexpr size_t kStateBlocks = kStateBytes / sizeof(Vector128); @@ -623,8 +608,7 @@ void ABSL_TARGET_CRYPTO RandenHwAes::Generate(const void* keys, void* state_void) { static_assert(kCapacityBytes == sizeof(Vector128), "Capacity mismatch"); - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state = - reinterpret_cast<uint64_t*>(state_void); + auto* state = static_cast<uint64_t*>(state_void); const Vector128 prev_inner = Vector128Load(state); |