Restoring authorship annotation for <anastasy888@yandex-team.ru>. Commit 2 of 2.

1 files changed, 368 insertions, 368 deletions

diff --git a/contrib/restricted/abseil-cpp/absl/random/internal/randen_hwaes.cc b/contrib/restricted/abseil-cpp/absl/random/internal/randen_hwaes.cc
index 6758243a27..fee6677cb4 100644
--- a/contrib/restricted/abseil-cpp/absl/random/internal/randen_hwaes.cc
+++ b/contrib/restricted/abseil-cpp/absl/random/internal/randen_hwaes.cc
@@ -1,289 +1,289 @@
-// Copyright 2017 The Abseil Authors. 
-// 
-// Licensed under the Apache License, Version 2.0 (the "License"); 
-// you may not use this file except in compliance with the License. 
-// You may obtain a copy of the License at 
-// 
-//      https://www.apache.org/licenses/LICENSE-2.0 
-// 
-// Unless required by applicable law or agreed to in writing, software 
-// distributed under the License is distributed on an "AS IS" BASIS, 
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
-// See the License for the specific language governing permissions and 
-// limitations under the License. 
- 
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate 
-// symbols from arbitrary system and other headers, since it may be built 
-// with different flags from other targets, using different levels of 
-// optimization, potentially introducing ODR violations. 
- 
-#include "absl/random/internal/randen_hwaes.h" 
- 
-#include <cstdint> 
-#include <cstring> 
- 
-#include "absl/base/attributes.h" 
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
+// symbols from arbitrary system and other headers, since it may be built
+// with different flags from other targets, using different levels of
+// optimization, potentially introducing ODR violations.
+
+#include "absl/random/internal/randen_hwaes.h"
+
+#include <cstdint>
+#include <cstring>
+
+#include "absl/base/attributes.h"
 #include "absl/numeric/int128.h"
-#include "absl/random/internal/platform.h" 
+#include "absl/random/internal/platform.h"
 #include "absl/random/internal/randen_traits.h"
- 
-// ABSL_RANDEN_HWAES_IMPL indicates whether this file will contain 
-// a hardware accelerated implementation of randen, or whether it 
-// will contain stubs that exit the process. 
-#if ABSL_HAVE_ACCELERATED_AES 
+
+// ABSL_RANDEN_HWAES_IMPL indicates whether this file will contain
+// a hardware accelerated implementation of randen, or whether it
+// will contain stubs that exit the process.
+#if ABSL_HAVE_ACCELERATED_AES
 // The following plaforms have implemented RandenHwAes.
 #if defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32) || \
     defined(ABSL_ARCH_PPC) || defined(ABSL_ARCH_ARM) ||       \
     defined(ABSL_ARCH_AARCH64)
-#define ABSL_RANDEN_HWAES_IMPL 1 
-#endif 
-#endif 
- 
-#if !defined(ABSL_RANDEN_HWAES_IMPL) 
-// No accelerated implementation is supported. 
-// The RandenHwAes functions are stubs that print an error and exit. 
- 
-#include <cstdio> 
-#include <cstdlib> 
- 
-namespace absl { 
+#define ABSL_RANDEN_HWAES_IMPL 1
+#endif
+#endif
+
+#if !defined(ABSL_RANDEN_HWAES_IMPL)
+// No accelerated implementation is supported.
+// The RandenHwAes functions are stubs that print an error and exit.
+
+#include <cstdio>
+#include <cstdlib>
+
+namespace absl {
 ABSL_NAMESPACE_BEGIN
-namespace random_internal { 
- 
-// No accelerated implementation. 
-bool HasRandenHwAesImplementation() { return false; } 
- 
-// NOLINTNEXTLINE 
-const void* RandenHwAes::GetKeys() { 
-  // Attempted to dispatch to an unsupported dispatch target. 
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH; 
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d); 
-  exit(1); 
-  return nullptr; 
-} 
- 
-// NOLINTNEXTLINE 
-void RandenHwAes::Absorb(const void*, void*) { 
-  // Attempted to dispatch to an unsupported dispatch target. 
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH; 
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d); 
-  exit(1); 
-} 
- 
-// NOLINTNEXTLINE 
-void RandenHwAes::Generate(const void*, void*) { 
-  // Attempted to dispatch to an unsupported dispatch target. 
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH; 
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d); 
-  exit(1); 
-} 
- 
-}  // namespace random_internal 
+namespace random_internal {
+
+// No accelerated implementation.
+bool HasRandenHwAesImplementation() { return false; }
+
+// NOLINTNEXTLINE
+const void* RandenHwAes::GetKeys() {
+  // Attempted to dispatch to an unsupported dispatch target.
+  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
+  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
+  exit(1);
+  return nullptr;
+}
+
+// NOLINTNEXTLINE
+void RandenHwAes::Absorb(const void*, void*) {
+  // Attempted to dispatch to an unsupported dispatch target.
+  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
+  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
+  exit(1);
+}
+
+// NOLINTNEXTLINE
+void RandenHwAes::Generate(const void*, void*) {
+  // Attempted to dispatch to an unsupported dispatch target.
+  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
+  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
+  exit(1);
+}
+
+}  // namespace random_internal
 ABSL_NAMESPACE_END
-}  // namespace absl 
- 
-#else  // defined(ABSL_RANDEN_HWAES_IMPL) 
-// 
-// Accelerated implementations are supported. 
-// We need the per-architecture includes and defines. 
-// 
+}  // namespace absl
+
+#else  // defined(ABSL_RANDEN_HWAES_IMPL)
+//
+// Accelerated implementations are supported.
+// We need the per-architecture includes and defines.
+//
 namespace {
- 
+
 using absl::random_internal::RandenTraits;
- 
+
 }  // namespace
 
-// TARGET_CRYPTO defines a crypto attribute for each architecture. 
-// 
-// NOTE: Evaluate whether we should eliminate ABSL_TARGET_CRYPTO. 
-#if (defined(__clang__) || defined(__GNUC__)) 
-#if defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32) 
-#define ABSL_TARGET_CRYPTO __attribute__((target("aes"))) 
-#elif defined(ABSL_ARCH_PPC) 
-#define ABSL_TARGET_CRYPTO __attribute__((target("crypto"))) 
-#else 
-#define ABSL_TARGET_CRYPTO 
-#endif 
-#else 
-#define ABSL_TARGET_CRYPTO 
-#endif 
- 
-#if defined(ABSL_ARCH_PPC) 
-// NOTE: Keep in mind that PPC can operate in little-endian or big-endian mode, 
-// however the PPC altivec vector registers (and thus the AES instructions) 
-// always operate in big-endian mode. 
- 
-#include <altivec.h> 
-// <altivec.h> #defines vector __vector; in C++, this is bad form. 
-#undef vector 
+// TARGET_CRYPTO defines a crypto attribute for each architecture.
+//
+// NOTE: Evaluate whether we should eliminate ABSL_TARGET_CRYPTO.
+#if (defined(__clang__) || defined(__GNUC__))
+#if defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32)
+#define ABSL_TARGET_CRYPTO __attribute__((target("aes")))
+#elif defined(ABSL_ARCH_PPC)
+#define ABSL_TARGET_CRYPTO __attribute__((target("crypto")))
+#else
+#define ABSL_TARGET_CRYPTO
+#endif
+#else
+#define ABSL_TARGET_CRYPTO
+#endif
+
+#if defined(ABSL_ARCH_PPC)
+// NOTE: Keep in mind that PPC can operate in little-endian or big-endian mode,
+// however the PPC altivec vector registers (and thus the AES instructions)
+// always operate in big-endian mode.
+
+#include <altivec.h>
+// <altivec.h> #defines vector __vector; in C++, this is bad form.
+#undef vector
 #undef bool
- 
-// Rely on the PowerPC AltiVec vector operations for accelerated AES 
-// instructions. GCC support of the PPC vector types is described in: 
-// https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html 
-// 
-// Already provides operator^=. 
-using Vector128 = __vector unsigned long long;  // NOLINT(runtime/int) 
- 
-namespace { 
-inline ABSL_TARGET_CRYPTO Vector128 ReverseBytes(const Vector128& v) { 
-  // Reverses the bytes of the vector. 
-  const __vector unsigned char perm = {15, 14, 13, 12, 11, 10, 9, 8, 
-                                       7,  6,  5,  4,  3,  2,  1, 0}; 
-  return vec_perm(v, v, perm); 
-} 
- 
-// 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* from) { 
-  return vec_vsx_ld(0, reinterpret_cast<const Vector128*>(from)); 
-} 
- 
-inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { 
-  vec_vsx_st(v, 0, reinterpret_cast<Vector128*>(to)); 
-} 
- 
-// One round of AES. "round_key" is a public constant for breaking the 
-// symmetry of AES (ensures previously equal columns differ afterwards). 
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, 
-                                             const Vector128& round_key) { 
-  return Vector128(__builtin_crypto_vcipher(state, round_key)); 
-} 
- 
-// Enables native loads in the round loop by pre-swapping. 
+
+// Rely on the PowerPC AltiVec vector operations for accelerated AES
+// instructions. GCC support of the PPC vector types is described in:
+// https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html
+//
+// Already provides operator^=.
+using Vector128 = __vector unsigned long long;  // NOLINT(runtime/int)
+
+namespace {
+inline ABSL_TARGET_CRYPTO Vector128 ReverseBytes(const Vector128& v) {
+  // Reverses the bytes of the vector.
+  const __vector unsigned char perm = {15, 14, 13, 12, 11, 10, 9, 8,
+                                       7,  6,  5,  4,  3,  2,  1, 0};
+  return vec_perm(v, v, perm);
+}
+
+// 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* from) {
+  return vec_vsx_ld(0, reinterpret_cast<const Vector128*>(from));
+}
+
+inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) {
+  vec_vsx_st(v, 0, reinterpret_cast<Vector128*>(to));
+}
+
+// One round of AES. "round_key" is a public constant for breaking the
+// symmetry of AES (ensures previously equal columns differ afterwards).
+inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
+                                             const Vector128& round_key) {
+  return Vector128(__builtin_crypto_vcipher(state, round_key));
+}
+
+// Enables native loads in the round loop by pre-swapping.
 inline ABSL_TARGET_CRYPTO void SwapEndian(absl::uint128* state) {
   for (uint32_t block = 0; block < RandenTraits::kFeistelBlocks; ++block) {
     Vector128Store(ReverseBytes(Vector128Load(state + block)), state + block);
-  } 
-} 
- 
-}  // namespace 
- 
-#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64) 
- 
-// Rely on the ARM NEON+Crypto advanced simd types, defined in <arm_neon.h>. 
-// uint8x16_t is the user alias for underlying __simd128_uint8_t type. 
-// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf 
-// 
-// <arm_neon> defines the following 
-// 
-// typedef __attribute__((neon_vector_type(16))) uint8_t uint8x16_t; 
-// typedef __attribute__((neon_vector_type(16))) int8_t int8x16_t; 
-// typedef __attribute__((neon_polyvector_type(16))) int8_t poly8x16_t; 
-// 
-// vld1q_v 
-// vst1q_v 
-// vaeseq_v 
-// vaesmcq_v 
-#include <arm_neon.h> 
- 
-// Already provides operator^=. 
-using Vector128 = uint8x16_t; 
- 
-namespace { 
- 
-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* to) { 
-  vst1q_u8(reinterpret_cast<uint8_t*>(to), v); 
-} 
- 
-// One round of AES. "round_key" is a public constant for breaking the 
-// symmetry of AES (ensures previously equal columns differ afterwards). 
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, 
-                                             const Vector128& round_key) { 
-  // It is important to always use the full round function - omitting the 
-  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf] 
-  // and does not help because we never decrypt. 
-  // 
-  // Note that ARM divides AES instructions differently than x86 / PPC, 
-  // And we need to skip the first AddRoundKey step and add an extra 
-  // AddRoundKey step to the end. Lucky for us this is just XOR. 
-  return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key; 
-} 
- 
+  }
+}
+
+}  // namespace
+
+#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
+
+// Rely on the ARM NEON+Crypto advanced simd types, defined in <arm_neon.h>.
+// uint8x16_t is the user alias for underlying __simd128_uint8_t type.
+// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf
+//
+// <arm_neon> defines the following
+//
+// typedef __attribute__((neon_vector_type(16))) uint8_t uint8x16_t;
+// typedef __attribute__((neon_vector_type(16))) int8_t int8x16_t;
+// typedef __attribute__((neon_polyvector_type(16))) int8_t poly8x16_t;
+//
+// vld1q_v
+// vst1q_v
+// vaeseq_v
+// vaesmcq_v
+#include <arm_neon.h>
+
+// Already provides operator^=.
+using Vector128 = uint8x16_t;
+
+namespace {
+
+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* to) {
+  vst1q_u8(reinterpret_cast<uint8_t*>(to), v);
+}
+
+// One round of AES. "round_key" is a public constant for breaking the
+// symmetry of AES (ensures previously equal columns differ afterwards).
+inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
+                                             const Vector128& round_key) {
+  // It is important to always use the full round function - omitting the
+  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf]
+  // and does not help because we never decrypt.
+  //
+  // Note that ARM divides AES instructions differently than x86 / PPC,
+  // And we need to skip the first AddRoundKey step and add an extra
+  // AddRoundKey step to the end. Lucky for us this is just XOR.
+  return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
+}
+
 inline ABSL_TARGET_CRYPTO void SwapEndian(void*) {}
- 
-}  // namespace 
- 
-#elif defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32) 
-// On x86 we rely on the aesni instructions 
+
+}  // namespace
+
+#elif defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32)
+// On x86 we rely on the aesni instructions
 #include <immintrin.h>
- 
-namespace { 
- 
-// Vector128 class is only wrapper for __m128i, benchmark indicates that it's 
-// faster than using __m128i directly. 
-class Vector128 { 
- public: 
-  // Convert from/to intrinsics. 
+
+namespace {
+
+// Vector128 class is only wrapper for __m128i, benchmark indicates that it's
+// faster than using __m128i directly.
+class Vector128 {
+ public:
+  // Convert from/to intrinsics.
   inline explicit Vector128(const __m128i& v) : data_(v) {}
- 
-  inline __m128i data() const { return data_; } 
- 
-  inline Vector128& operator^=(const Vector128& other) { 
-    data_ = _mm_xor_si128(data_, other.data()); 
-    return *this; 
-  } 
- 
- private: 
-  __m128i data_; 
-}; 
- 
-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* to) { 
-  _mm_store_si128(reinterpret_cast<__m128i*>(to), v.data()); 
-} 
- 
-// One round of AES. "round_key" is a public constant for breaking the 
-// symmetry of AES (ensures previously equal columns differ afterwards). 
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, 
-                                             const Vector128& round_key) { 
-  // It is important to always use the full round function - omitting the 
-  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf] 
-  // and does not help because we never decrypt. 
-  return Vector128(_mm_aesenc_si128(state.data(), round_key.data())); 
-} 
- 
+
+  inline __m128i data() const { return data_; }
+
+  inline Vector128& operator^=(const Vector128& other) {
+    data_ = _mm_xor_si128(data_, other.data());
+    return *this;
+  }
+
+ private:
+  __m128i data_;
+};
+
+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* to) {
+  _mm_store_si128(reinterpret_cast<__m128i*>(to), v.data());
+}
+
+// One round of AES. "round_key" is a public constant for breaking the
+// symmetry of AES (ensures previously equal columns differ afterwards).
+inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
+                                             const Vector128& round_key) {
+  // It is important to always use the full round function - omitting the
+  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf]
+  // and does not help because we never decrypt.
+  return Vector128(_mm_aesenc_si128(state.data(), round_key.data()));
+}
+
 inline ABSL_TARGET_CRYPTO void SwapEndian(void*) {}
- 
-}  // namespace 
- 
-#endif 
- 
-#ifdef __clang__ 
-#pragma clang diagnostic push 
-#pragma clang diagnostic ignored "-Wunknown-pragmas" 
-#endif 
- 
-// At this point, all of the platform-specific features have been defined / 
-// implemented. 
-// 
-// REQUIRES: using Vector128 = ... 
-// REQUIRES: Vector128 Vector128Load(void*) {...} 
-// REQUIRES: void Vector128Store(Vector128, void*) {...} 
-// REQUIRES: Vector128 AesRound(Vector128, Vector128) {...} 
-// REQUIRES: void SwapEndian(uint64_t*) {...} 
-// 
-// PROVIDES: absl::random_internal::RandenHwAes::Absorb 
-// PROVIDES: absl::random_internal::RandenHwAes::Generate 
+
+}  // namespace
+
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunknown-pragmas"
+#endif
+
+// At this point, all of the platform-specific features have been defined /
+// implemented.
+//
+// REQUIRES: using Vector128 = ...
+// REQUIRES: Vector128 Vector128Load(void*) {...}
+// REQUIRES: void Vector128Store(Vector128, void*) {...}
+// REQUIRES: Vector128 AesRound(Vector128, Vector128) {...}
+// REQUIRES: void SwapEndian(uint64_t*) {...}
+//
+// PROVIDES: absl::random_internal::RandenHwAes::Absorb
+// PROVIDES: absl::random_internal::RandenHwAes::Generate
 namespace {
- 
-// Block shuffles applies a shuffle to the entire state between AES rounds. 
-// Improved odd-even shuffle from "New criterion for diffusion property". 
+
+// 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(absl::uint128* state) {
   static_assert(RandenTraits::kFeistelBlocks == 16,
                 "Expecting 16 FeistelBlocks.");
- 
+
   constexpr size_t shuffle[RandenTraits::kFeistelBlocks] = {
       7, 2, 13, 4, 11, 8, 3, 6, 15, 0, 9, 10, 1, 14, 5, 12};
- 
+
   const Vector128 v0 = Vector128Load(state + shuffle[0]);
   const Vector128 v1 = Vector128Load(state + shuffle[1]);
   const Vector128 v2 = Vector128Load(state + shuffle[2]);
@@ -300,7 +300,7 @@ inline ABSL_TARGET_CRYPTO void BlockShuffle(absl::uint128* state) {
   const Vector128 w5 = Vector128Load(state + shuffle[13]);
   const Vector128 w6 = Vector128Load(state + shuffle[14]);
   const Vector128 w7 = Vector128Load(state + shuffle[15]);
- 
+
   Vector128Store(v0, state + 0);
   Vector128Store(v1, state + 1);
   Vector128Store(v2, state + 2);
@@ -317,21 +317,21 @@ inline ABSL_TARGET_CRYPTO void BlockShuffle(absl::uint128* state) {
   Vector128Store(w5, state + 13);
   Vector128Store(w6, state + 14);
   Vector128Store(w7, state + 15);
-} 
- 
-// Feistel round function using two AES subrounds. Very similar to F() 
-// from Simpira v2, but with independent subround keys. Uses 17 AES rounds 
-// per 16 bytes (vs. 10 for AES-CTR). Computing eight round functions in 
-// parallel hides the 7-cycle AESNI latency on HSW. Note that the Feistel 
-// XORs are 'free' (included in the second AES instruction). 
+}
+
+// Feistel round function using two AES subrounds. Very similar to F()
+// from Simpira v2, but with independent subround keys. Uses 17 AES rounds
+// per 16 bytes (vs. 10 for AES-CTR). Computing eight round functions in
+// 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 absl::uint128* FeistelRound(
     absl::uint128* state,
     const absl::uint128* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
   static_assert(RandenTraits::kFeistelBlocks == 16,
                 "Expecting 16 FeistelBlocks.");
- 
-  // MSVC does a horrible job at unrolling loops. 
-  // So we unroll the loop by hand to improve the performance. 
+
+  // MSVC does a horrible job at unrolling loops.
+  // So we unroll the loop by hand to improve the performance.
   const Vector128 s0 = Vector128Load(state + 0);
   const Vector128 s1 = Vector128Load(state + 1);
   const Vector128 s2 = Vector128Load(state + 2);
@@ -348,28 +348,28 @@ inline ABSL_TARGET_CRYPTO const absl::uint128* FeistelRound(
   const Vector128 s13 = Vector128Load(state + 13);
   const Vector128 s14 = Vector128Load(state + 14);
   const Vector128 s15 = Vector128Load(state + 15);
- 
-  // Encode even blocks with keys. 
-  const Vector128 e0 = AesRound(s0, Vector128Load(keys + 0)); 
-  const Vector128 e2 = AesRound(s2, Vector128Load(keys + 1)); 
-  const Vector128 e4 = AesRound(s4, Vector128Load(keys + 2)); 
-  const Vector128 e6 = AesRound(s6, Vector128Load(keys + 3)); 
-  const Vector128 e8 = AesRound(s8, Vector128Load(keys + 4)); 
-  const Vector128 e10 = AesRound(s10, Vector128Load(keys + 5)); 
-  const Vector128 e12 = AesRound(s12, Vector128Load(keys + 6)); 
-  const Vector128 e14 = AesRound(s14, Vector128Load(keys + 7)); 
- 
-  // Encode odd blocks with even output from above. 
-  const Vector128 o1 = AesRound(e0, s1); 
-  const Vector128 o3 = AesRound(e2, s3); 
-  const Vector128 o5 = AesRound(e4, s5); 
-  const Vector128 o7 = AesRound(e6, s7); 
-  const Vector128 o9 = AesRound(e8, s9); 
-  const Vector128 o11 = AesRound(e10, s11); 
-  const Vector128 o13 = AesRound(e12, s13); 
-  const Vector128 o15 = AesRound(e14, s15); 
- 
-  // Store odd blocks. (These will be shuffled later). 
+
+  // Encode even blocks with keys.
+  const Vector128 e0 = AesRound(s0, Vector128Load(keys + 0));
+  const Vector128 e2 = AesRound(s2, Vector128Load(keys + 1));
+  const Vector128 e4 = AesRound(s4, Vector128Load(keys + 2));
+  const Vector128 e6 = AesRound(s6, Vector128Load(keys + 3));
+  const Vector128 e8 = AesRound(s8, Vector128Load(keys + 4));
+  const Vector128 e10 = AesRound(s10, Vector128Load(keys + 5));
+  const Vector128 e12 = AesRound(s12, Vector128Load(keys + 6));
+  const Vector128 e14 = AesRound(s14, Vector128Load(keys + 7));
+
+  // Encode odd blocks with even output from above.
+  const Vector128 o1 = AesRound(e0, s1);
+  const Vector128 o3 = AesRound(e2, s3);
+  const Vector128 o5 = AesRound(e4, s5);
+  const Vector128 o7 = AesRound(e6, s7);
+  const Vector128 o9 = AesRound(e8, s9);
+  const Vector128 o11 = AesRound(e10, s11);
+  const Vector128 o13 = AesRound(e12, s13);
+  const Vector128 o15 = AesRound(e14, s15);
+
+  // Store odd blocks. (These will be shuffled later).
   Vector128Store(o1, state + 1);
   Vector128Store(o3, state + 3);
   Vector128Store(o5, state + 5);
@@ -378,149 +378,149 @@ inline ABSL_TARGET_CRYPTO const absl::uint128* FeistelRound(
   Vector128Store(o11, state + 11);
   Vector128Store(o13, state + 13);
   Vector128Store(o15, state + 15);
- 
-  return keys + 8; 
-} 
- 
-// Cryptographic permutation based via type-2 Generalized Feistel Network. 
-// Indistinguishable from ideal by chosen-ciphertext adversaries using less than 
-// 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( 
+
+  return keys + 8;
+}
+
+// Cryptographic permutation based via type-2 Generalized Feistel Network.
+// Indistinguishable from ideal by chosen-ciphertext adversaries using less than
+// 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(
     absl::uint128* state,
     const absl::uint128* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
-  // (Successfully unrolled; the first iteration jumps into the second half) 
-#ifdef __clang__ 
-#pragma clang loop unroll_count(2) 
-#endif 
+  // (Successfully unrolled; the first iteration jumps into the second half)
+#ifdef __clang__
+#pragma clang loop unroll_count(2)
+#endif
   for (size_t round = 0; round < RandenTraits::kFeistelRounds; ++round) {
     keys = FeistelRound(state, keys);
-    BlockShuffle(state); 
-  } 
-} 
- 
-}  // namespace 
- 
-namespace absl { 
+    BlockShuffle(state);
+  }
+}
+
+}  // namespace
+
+namespace absl {
 ABSL_NAMESPACE_BEGIN
-namespace random_internal { 
- 
-bool HasRandenHwAesImplementation() { return true; } 
- 
-const void* ABSL_TARGET_CRYPTO RandenHwAes::GetKeys() { 
-  // Round keys for one AES per Feistel round and branch. 
-  // The canonical implementation uses first digits of Pi. 
+namespace random_internal {
+
+bool HasRandenHwAesImplementation() { return true; }
+
+const void* ABSL_TARGET_CRYPTO RandenHwAes::GetKeys() {
+  // Round keys for one AES per Feistel round and branch.
+  // The canonical implementation uses first digits of Pi.
 #if defined(ABSL_ARCH_PPC)
   return kRandenRoundKeysBE;
 #else
   return kRandenRoundKeys;
 #endif
-} 
- 
-// NOLINTNEXTLINE 
-void ABSL_TARGET_CRYPTO RandenHwAes::Absorb(const void* seed_void, 
-                                            void* state_void) { 
+}
+
+// NOLINTNEXTLINE
+void ABSL_TARGET_CRYPTO RandenHwAes::Absorb(const void* seed_void,
+                                            void* state_void) {
   static_assert(RandenTraits::kCapacityBytes / sizeof(Vector128) == 1,
                 "Unexpected Randen kCapacityBlocks");
   static_assert(RandenTraits::kStateBytes / sizeof(Vector128) == 16,
                 "Unexpected Randen kStateBlocks");
- 
+
   auto* state = reinterpret_cast<absl::uint128 * ABSL_RANDOM_INTERNAL_RESTRICT>(
       state_void);
   const auto* seed =
       reinterpret_cast<const absl::uint128 * ABSL_RANDOM_INTERNAL_RESTRICT>(
           seed_void);
- 
+
   Vector128 b1 = Vector128Load(state + 1);
   b1 ^= Vector128Load(seed + 0);
   Vector128Store(b1, state + 1);
- 
+
   Vector128 b2 = Vector128Load(state + 2);
   b2 ^= Vector128Load(seed + 1);
   Vector128Store(b2, state + 2);
- 
+
   Vector128 b3 = Vector128Load(state + 3);
   b3 ^= Vector128Load(seed + 2);
   Vector128Store(b3, state + 3);
- 
+
   Vector128 b4 = Vector128Load(state + 4);
   b4 ^= Vector128Load(seed + 3);
   Vector128Store(b4, state + 4);
- 
+
   Vector128 b5 = Vector128Load(state + 5);
   b5 ^= Vector128Load(seed + 4);
   Vector128Store(b5, state + 5);
- 
+
   Vector128 b6 = Vector128Load(state + 6);
   b6 ^= Vector128Load(seed + 5);
   Vector128Store(b6, state + 6);
- 
+
   Vector128 b7 = Vector128Load(state + 7);
   b7 ^= Vector128Load(seed + 6);
   Vector128Store(b7, state + 7);
- 
+
   Vector128 b8 = Vector128Load(state + 8);
   b8 ^= Vector128Load(seed + 7);
   Vector128Store(b8, state + 8);
- 
+
   Vector128 b9 = Vector128Load(state + 9);
   b9 ^= Vector128Load(seed + 8);
   Vector128Store(b9, state + 9);
- 
+
   Vector128 b10 = Vector128Load(state + 10);
   b10 ^= Vector128Load(seed + 9);
   Vector128Store(b10, state + 10);
- 
+
   Vector128 b11 = Vector128Load(state + 11);
   b11 ^= Vector128Load(seed + 10);
   Vector128Store(b11, state + 11);
- 
+
   Vector128 b12 = Vector128Load(state + 12);
   b12 ^= Vector128Load(seed + 11);
   Vector128Store(b12, state + 12);
- 
+
   Vector128 b13 = Vector128Load(state + 13);
   b13 ^= Vector128Load(seed + 12);
   Vector128Store(b13, state + 13);
- 
+
   Vector128 b14 = Vector128Load(state + 14);
   b14 ^= Vector128Load(seed + 13);
   Vector128Store(b14, state + 14);
- 
+
   Vector128 b15 = Vector128Load(state + 15);
   b15 ^= Vector128Load(seed + 14);
   Vector128Store(b15, state + 15);
-} 
- 
-// NOLINTNEXTLINE 
+}
+
+// NOLINTNEXTLINE
 void ABSL_TARGET_CRYPTO RandenHwAes::Generate(const void* keys_void,
-                                              void* state_void) { 
+                                              void* state_void) {
   static_assert(RandenTraits::kCapacityBytes == sizeof(Vector128),
                 "Capacity mismatch");
- 
+
   auto* state = reinterpret_cast<absl::uint128*>(state_void);
   const auto* keys = reinterpret_cast<const absl::uint128*>(keys_void);
- 
-  const Vector128 prev_inner = Vector128Load(state); 
- 
-  SwapEndian(state); 
- 
+
+  const Vector128 prev_inner = Vector128Load(state);
+
+  SwapEndian(state);
+
   Permute(state, keys);
- 
-  SwapEndian(state); 
- 
-  // Ensure backtracking resistance. 
-  Vector128 inner = Vector128Load(state); 
-  inner ^= prev_inner; 
-  Vector128Store(inner, state); 
-} 
- 
-#ifdef __clang__ 
-#pragma clang diagnostic pop 
-#endif 
- 
-}  // namespace random_internal 
+
+  SwapEndian(state);
+
+  // Ensure backtracking resistance.
+  Vector128 inner = Vector128Load(state);
+  inner ^= prev_inner;
+  Vector128Store(inner, state);
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+}  // namespace random_internal
 ABSL_NAMESPACE_END
-}  // namespace absl 
- 
-#endif  // (ABSL_RANDEN_HWAES_IMPL) 
+}  // namespace absl
+
+#endif  // (ABSL_RANDEN_HWAES_IMPL)