The Tor Browser: browser/components/translation/cld2/internal/port.h@6474c204b198 (annotated)

browser/components/translation/cld2/internal/port.h@6474c204b198 (annotated)

browser/components/translation/cld2/internal/port.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright 2013 Google Inc. All Rights Reserved.
 //
 // 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
 //
 //     http://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.
 //
 // These are weird things we need to do to get this compiling on
 // random systems [subset].
 #ifndef BASE_PORT_H_
 #define BASE_PORT_H_
 #include <string.h>         // for memcpy()
 #include "integral_types.h"
 namespace CLD2 {
 // Portable handling of unaligned loads, stores, and copies.
 // On some platforms, like ARM, the copy functions can be more efficient
 // then a load and a store.
 #if defined(ARCH_PIII) || defined(ARCH_ATHLON) || defined(ARCH_K8) || defined(_ARCH_PPC)
 // x86 and x86-64 can perform unaligned loads/stores directly;
 // modern PowerPC hardware can also do unaligned integer loads and stores;
 // but note: the FPU still sends unaligned loads and stores to a trap handler!
 #define UNALIGNED_LOAD16(_p) (*reinterpret_cast<const uint16 *>(_p))
 #define UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32 *>(_p))
 #define UNALIGNED_LOAD64(_p) (*reinterpret_cast<const uint64 *>(_p))
 #define UNALIGNED_STORE16(_p, _val) (*reinterpret_cast<uint16 *>(_p) = (_val))
 #define UNALIGNED_STORE32(_p, _val) (*reinterpret_cast<uint32 *>(_p) = (_val))
 #define UNALIGNED_STORE64(_p, _val) (*reinterpret_cast<uint64 *>(_p) = (_val))
 #elif defined(__arm__) && \
       !defined(__ARM_ARCH_5__) && \
       !defined(__ARM_ARCH_5T__) && \
       !defined(__ARM_ARCH_5TE__) && \
       !defined(__ARM_ARCH_5TEJ__) && \
       !defined(__ARM_ARCH_6__) && \
       !defined(__ARM_ARCH_6J__) && \
       !defined(__ARM_ARCH_6K__) && \
       !defined(__ARM_ARCH_6Z__) && \
       !defined(__ARM_ARCH_6ZK__) && \
       !defined(__ARM_ARCH_6T2__)
 // ARMv7 and newer support native unaligned accesses, but only of 16-bit
 // and 32-bit values (not 64-bit); older versions either raise a fatal signal,
 // do an unaligned read and rotate the words around a bit, or do the reads very
 // slowly (trip through kernel mode). There's no simple #define that says just
 // “ARMv7 or higher”, so we have to filter away all ARMv5 and ARMv6
 // sub-architectures. Newer gcc (>= 4.6) set an __ARM_FEATURE_ALIGNED #define,
 // so in time, maybe we can move on to that.
 //
 // This is a mess, but there's not much we can do about it.
 #define UNALIGNED_LOAD16(_p) (*reinterpret_cast<const uint16 *>(_p))
 #define UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32 *>(_p))
 #define UNALIGNED_STORE16(_p, _val) (*reinterpret_cast<uint16 *>(_p) = (_val))
 #define UNALIGNED_STORE32(_p, _val) (*reinterpret_cast<uint32 *>(_p) = (_val))
 // TODO(sesse): NEON supports unaligned 64-bit loads and stores.
 // See if that would be more efficient on platforms supporting it,
 // at least for copies.
 inline uint64 UNALIGNED_LOAD64(const void *p) {
   uint64 t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 inline void UNALIGNED_STORE64(void *p, uint64 v) {
   memcpy(p, &v, sizeof v);
 }
 #else
 #define NEED_ALIGNED_LOADS
 // These functions are provided for architectures that don't support
 // unaligned loads and stores.
 inline uint16 UNALIGNED_LOAD16(const void *p) {
   uint16 t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 inline uint32 UNALIGNED_LOAD32(const void *p) {
   uint32 t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 inline uint64 UNALIGNED_LOAD64(const void *p) {
   uint64 t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 inline void UNALIGNED_STORE16(void *p, uint16 v) {
   memcpy(p, &v, sizeof v);
 }
 inline void UNALIGNED_STORE32(void *p, uint32 v) {
   memcpy(p, &v, sizeof v);
 }
 inline void UNALIGNED_STORE64(void *p, uint64 v) {
   memcpy(p, &v, sizeof v);
 }
 #endif
 }       // End namespace CLD2
 #endif  // BASE_PORT_H_

The Tor Browser / annotate

browser/components/translation/cld2/internal/port.h@6474c204b198 (annotated)

browser/components/translation/cld2/internal/port.h