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More wordy comments about Neon

Browse Source 
BUG=315
TESTED=untested
R=wuwang@google.com

Review URL: https://webrtc-codereview.appspot.com/9599004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@982 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2014-03-08 00:23:04 +00:00
parent 996dacac87
commit 6e618676dc
3 changed files with 8 additions and 6 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv Name: libyuv
URL: http://code.google.com/p/libyuv/ URL: http://code.google.com/p/libyuv/
Version: 981 Version: 982
License: BSD License: BSD
License File: LICENSE License File: LICENSE

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT #ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT
#define INCLUDE_LIBYUV_VERSION_H_ #define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 981 #define LIBYUV_VERSION 982
#endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT #endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT

10
source/cpu_id.cc
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@ -122,7 +122,9 @@ LIBYUV_API SAFEBUFFERS
int ArmCpuCaps(const char* cpuinfo_name) { int ArmCpuCaps(const char* cpuinfo_name) {
FILE* f = fopen(cpuinfo_name, "r"); FILE* f = fopen(cpuinfo_name, "r");
if (!f) { if (!f) {
return kCpuHasNEON; // Assume Neon if /proc/cpuinfo is unavailable. // Assume Neon if /proc/cpuinfo is unavailable.
// This will occur for Chrome sandbox for Pepper or Render process.
return kCpuHasNEON;
} }
char cpuinfo_line[512]; char cpuinfo_line[512];
while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f)) { while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f)) {
@ -248,10 +250,10 @@ int InitCpuFlags(void) {
cpu_info_ &= ~kCpuHasMIPS_DSPR2; cpu_info_ &= ~kCpuHasMIPS_DSPR2;
} }
#elif defined(__arm__) #elif defined(__arm__)
// gcc -mfpu=neon defines __ARM_NEON__
// __ARM_NEON__ generates code that requires Neon. NaCL also requires Neon.
// For Linux, /proc/cpuinfo can be tested but without that assume Neon.
#if defined(__ARM_NEON__) || defined(__native_client__) || !defined(__linux__) #if defined(__ARM_NEON__) || defined(__native_client__) || !defined(__linux__)
// gcc -mfpu=neon defines __ARM_NEON__
// Enable Neon if you want support for Neon and Arm, and use MaskCpuFlags
// to disable Neon on devices that do not have it.
cpu_info_ = kCpuHasNEON; cpu_info_ = kCpuHasNEON;
#else #else
// Linux arm parse text file for neon detect. // Linux arm parse text file for neon detect.