AuroraMiddleware/skia2
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try stosd/w

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While we're trying things and reverting them, might as well try this too.

BUG=skia:4316

Blinking in and out for perf.skia.org.
TBR=reed@google.com

Review URL: https://codereview.chromium.org/1355063002
This commit is contained in:
mtklein 2015-09-20 18:05:23 -07:00 committed by Commit bot
parent b63d816683
commit 3ca0f626a0
1 changed files with 19 additions and 10 deletions
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29
include/core/SkUtils.h
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@ -9,6 +9,9 @@
#define SkUtils_DEFINED
#include "SkTypes.h"
#if defined(SK_BUILD_FOR_WIN)
#include <intrin.h>
#endif
namespace SkOpts {
extern void (*memset16)(uint16_t[], uint16_t, int);
@ -31,12 +34,15 @@ namespace SkOpts {
@param count The number of times value should be copied into the buffer.
*/
static inline void sk_memset16(uint16_t buffer[], uint16_t value, int count) {
#if defined(SK_CPU_ARM64)
while (count --> 0) { *buffer++ = value; } return;
#elif defined(SK_CPU_ARM32)
if (count <= 10) { while (count --> 0) { *buffer++ = value; } return; }
#endif
#if defined(SK_BUILD_FOR_WIN)
__stosw(buffer, value, count);
#elif defined(SK_CPU_X86)
__asm__ __volatile__ ( "rep stosw" : "+D"(buffer), "+c"(count) : "a"(value) );
#elif defined(SK_ARM_HAS_NEON)
while (count --> 0) { *buffer++ = value; }
#else
SkOpts::memset16(buffer, value, count);
#endif
}
/** Similar to memset(), but it assigns a 32bit value into the buffer.
@ -45,12 +51,15 @@ static inline void sk_memset16(uint16_t buffer[], uint16_t value, int count) {
@param count The number of times value should be copied into the buffer.
*/
static inline void sk_memset32(uint32_t buffer[], uint32_t value, int count) {
#if defined(SK_CPU_ARM64)
while (count --> 0) { *buffer++ = value; } return;
#elif defined(SK_CPU_ARM32)
if (count <= 10) { while (count --> 0) { *buffer++ = value; } return; }
#endif
#if defined(SK_BUILD_FOR_WIN)
__stosd((PDWORD)buffer, value, count);
#elif defined(SK_CPU_X86)
__asm__ __volatile__ ( "rep stosl" : "+D"(buffer), "+c"(count) : "a"(value) );
#elif defined(SK_ARM_HAS_NEON)
while (count --> 0) { *buffer++ = value; }
#else
SkOpts::memset32(buffer, value, count);
#endif
}