/*
* Copyright ( c ) 2010 Mans Rullgard < mans @ mansr . com >
*
* This file is part of FFmpeg .
*
* FFmpeg is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 . 1 of the License , or ( at your option ) any later version .
*
* FFmpeg is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
#ifndef AVUTIL_ARM_INTMATH_H
#define AVUTIL_ARM_INTMATH_H
#include <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#if HAVE_INLINE_ASM
#if HAVE_ARMV6_INLINE
#define av_clip_uint8 av_clip_uint8_arm
static av_always_inline av_const int av_clip_uint8_arm(int a)
{
int x;
__asm__ ("usat %0, #8, %1" : "=r" (x) : "r" (a));
return x;
}
#define av_clip_int8 av_clip_int8_arm
static av_always_inline av_const int av_clip_int8_arm(int a)
{
int x;
__asm__ ("ssat %0, #8, %1" : "=r" (x) : "r" (a));
return x;
}
#define av_clip_uint16 av_clip_uint16_arm
static av_always_inline av_const int av_clip_uint16_arm(int a)
{
int x;
__asm__ ("usat %0, #16, %1" : "=r" (x) : "r" (a));
return x;
}
#define av_clip_int16 av_clip_int16_arm
static av_always_inline av_const int av_clip_int16_arm(int a)
{
int x;
__asm__ ("ssat %0, #16, %1" : "=r" (x) : "r" (a));
return x;
}
#define av_clip_intp2 av_clip_intp2_arm
static av_always_inline av_const int av_clip_intp2_arm(int a, int p)
{
if (av_builtin_constant_p(p)) {
unsigned x;
__asm__ ("ssat %0, %2, %1" : "=r" (x) : "r" (a), "i" (p+1 ));
return x;
} else {
if (((unsigned )a + (1 << p)) & ~((2 << p) - 1 ))
return (a >> 31 ) ^ ((1 << p) - 1 );
else
return a;
}
}
#define av_clip_uintp2 av_clip_uintp2_arm
static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p)
{
if (av_builtin_constant_p(p)) {
unsigned x;
__asm__ ("usat %0, %2, %1" : "=r" (x) : "r" (a), "i" (p));
return x;
} else {
if (a & ~((1 <<p) - 1 )) return (~a) >> 31 & ((1 <<p) - 1 );
else return a;
}
}
#define av_sat_add32 av_sat_add32_arm
static av_always_inline int av_sat_add32_arm(int a, int b)
{
int r;
__asm__ ("qadd %0, %1, %2" : "=r" (r) : "r" (a), "r" (b));
return r;
}
#define av_sat_dadd32 av_sat_dadd32_arm
static av_always_inline int av_sat_dadd32_arm(int a, int b)
{
int r;
__asm__ ("qdadd %0, %1, %2" : "=r" (r) : "r" (a), "r" (b));
return r;
}
#define av_sat_sub32 av_sat_sub32_arm
static av_always_inline int av_sat_sub32_arm(int a, int b)
{
int r;
__asm__ ("qsub %0, %1, %2" : "=r" (r) : "r" (a), "r" (b));
return r;
}
#define av_sat_dsub32 av_sat_dsub32_arm
static av_always_inline int av_sat_dsub32_arm(int a, int b)
{
int r;
__asm__ ("qdsub %0, %1, %2" : "=r" (r) : "r" (a), "r" (b));
return r;
}
#endif /* HAVE_ARMV6_INLINE */
#if HAVE_ASM_MOD_Q
#define av_clipl_int32 av_clipl_int32_arm
static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a)
{
int x, y;
__asm__ ("adds %1, %R2, %Q2, lsr #31 \n\t"
"itet ne \n\t"
"mvnne %1, #1<<31 \n\t"
"moveq %0, %Q2 \n\t"
"eorne %0, %1, %R2, asr #31 \n\t"
: "=r" (x), "=&r" (y) : "r" (a) : "cc" );
return x;
}
#endif /* HAVE_ASM_MOD_Q */
#endif /* HAVE_INLINE_ASM */
#endif /* AVUTIL_ARM_INTMATH_H */
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