From 7fd08ac1d1043b2d6c39eac11d00703b8fd42e40 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 2 Jun 2002 12:11:44 +0000 Subject: sqrt MAX, MIN Originally committed as revision 637 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/common.h | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'libavcodec/common.h') diff --git a/libavcodec/common.h b/libavcodec/common.h index 3f38901b00..5b320b2d82 100644 --- a/libavcodec/common.h +++ b/libavcodec/common.h @@ -151,6 +151,8 @@ inline void dprintf(const char* fmt,...) {} /* assume b>0 */ #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b)) #define ABS(a) ((a) >= 0 ? (a) : (-(a))) +#define MAX(a,b) ((a) > (b) ? (a) : (b)) +#define MIN(a,b) ((a) > (b) ? (b) : (a)) /* bit output */ @@ -420,7 +422,6 @@ static inline void jput_bits(PutBitContext *s, int n, int value) } #endif - static inline uint8_t* pbBufPtr(PutBitContext *s) { #ifdef ALT_BITSTREAM_WRITER @@ -897,6 +898,40 @@ void __av_freep(void **ptr); /* math */ int ff_gcd(int a, int b); +static inline int ff_sqrt(int a) +{ + int ret=0; + int s; + int ret_sq=0; + + for(s=15; s>=0; s--){ + int b= ret_sq + (1<<(s*2)) + (ret<= 686 && !defined(RUNTIME_CPUDETECT) +#define COPY3_IF_LT(x,y,a,b,c,d)\ +asm volatile (\ + "cmpl %0, %3 \n\t"\ + "cmovl %3, %0 \n\t"\ + "cmovl %4, %1 \n\t"\ + "cmovl %5, %2 \n\t"\ + : "+r" (x), "+r" (a), "+r" (c)\ + : "r" (y), "r" (b), "r" (d)\ +); +#else +#define COPY3_IF_LT(x,y,a,b,c,d)\ +if((y)<(x)){\ + (x)=(y);\ + (a)=(b);\ + (c)=(d);\ +} +#endif + #define CLAMP_TO_8BIT(d) ((d > 0xff) ? 0xff : (d < 0) ? 0 : d) #endif -- cgit v1.2.3