From 9077e29eccd39fca766aa5b2df843dbb171ec837 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= Date: Wed, 7 Jul 2010 17:27:51 +0000 Subject: [PATCH] ARM: optimised integer clip functions Originally committed as revision 24089 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavutil/arm/intmath.h | 45 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) 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 + #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 */