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authorMåns Rullgård <mans@mansr.com>2010-07-07 17:27:51 +0000
committerMåns Rullgård <mans@mansr.com>2010-07-07 17:27:51 +0000
commit9077e29eccd39fca766aa5b2df843dbb171ec837 (patch)
treeca1647cf4eb59a178d46a902953f12a5a58159d1
parentedd7fa82d7db69ae79b4c8994dcbdd0d4e26d907 (diff)
downloadffmpeg-9077e29eccd39fca766aa5b2df843dbb171ec837.tar.gz
ARM: optimised integer clip functions
Originally committed as revision 24089 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--libavutil/arm/intmath.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/libavutil/arm/intmath.h b/libavutil/arm/intmath.h
index 5514020339..2c0aa3b11c 100644
--- a/libavutil/arm/intmath.h
+++ b/libavutil/arm/intmath.h
@@ -21,6 +21,8 @@
#ifndef AVUTIL_ARM_INTMATH_H
#define AVUTIL_ARM_INTMATH_H
+#include <stdint.h>
+
#include "config.h"
#include "libavutil/attributes.h"
@@ -40,6 +42,38 @@ static inline av_const int FASTDIV(int a, int b)
return r;
}
+#define av_clip_uint8 av_clip_uint8_arm
+static inline av_const uint8_t av_clip_uint8_arm(int a)
+{
+ unsigned x;
+ __asm__ volatile ("usat %0, #8, %1" : "=r"(x) : "r"(a));
+ return x;
+}
+
+#define av_clip_int8 av_clip_int8_arm
+static inline av_const uint8_t av_clip_int8_arm(int a)
+{
+ unsigned x;
+ __asm__ volatile ("ssat %0, #8, %1" : "=r"(x) : "r"(a));
+ return x;
+}
+
+#define av_clip_uint16 av_clip_uint16_arm
+static inline av_const uint16_t av_clip_uint16_arm(int a)
+{
+ unsigned x;
+ __asm__ volatile ("usat %0, #16, %1" : "=r"(x) : "r"(a));
+ return x;
+}
+
+#define av_clip_int16 av_clip_int16_arm
+static inline av_const int16_t av_clip_int16_arm(int a)
+{
+ int x;
+ __asm__ volatile ("ssat %0, #16, %1" : "=r"(x) : "r"(a));
+ return x;
+}
+
#else /* HAVE_ARMV6 */
#define FASTDIV FASTDIV
@@ -53,6 +87,17 @@ static inline av_const int FASTDIV(int a, int b)
#endif /* HAVE_ARMV6 */
+#define av_clipl_int32 av_clipl_int32_arm
+static inline av_const int32_t av_clipl_int32_arm(int64_t a)
+{
+ int x, y;
+ __asm__ volatile ("adds %1, %R2, %Q2, lsr #31 \n\t"
+ "mvnne %1, #1<<31 \n\t"
+ "eorne %0, %1, %R2, asr #31 \n\t"
+ : "=r"(x), "=&r"(y) : "r"(a));
+ return x;
+}
+
#endif /* HAVE_INLINE_ASM */
#endif /* AVUTIL_ARM_INTMATH_H */