mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
|
|
* 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_RISCV_INTMATH_H
|
|
#define AVUTIL_RISCV_INTMATH_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
|
|
/*
|
|
* The compiler is forced to sign-extend the result anyhow, so it is faster to
|
|
* compute it explicitly and use it.
|
|
*/
|
|
#define av_clip_int8 av_clip_int8_rvi
|
|
static av_always_inline av_const int8_t av_clip_int8_rvi(int a)
|
|
{
|
|
union { uint8_t u; int8_t s; } u = { .u = a };
|
|
|
|
if (a != u.s)
|
|
a = ((a >> 31) ^ 0x7F);
|
|
return a;
|
|
}
|
|
|
|
#define av_clip_int16 av_clip_int16_rvi
|
|
static av_always_inline av_const int16_t av_clip_int16_rvi(int a)
|
|
{
|
|
union { uint16_t u; int16_t s; } u = { .u = a };
|
|
|
|
if (a != u.s)
|
|
a = ((a >> 31) ^ 0x7FFF);
|
|
return a;
|
|
}
|
|
|
|
#define av_clipl_int32 av_clipl_int32_rvi
|
|
static av_always_inline av_const int32_t av_clipl_int32_rvi(int64_t a)
|
|
{
|
|
union { uint32_t u; int32_t s; } u = { .u = a };
|
|
|
|
if (a != u.s)
|
|
a = ((a >> 63) ^ 0x7FFFFFFF);
|
|
return a;
|
|
}
|
|
|
|
#define av_clip_intp2 av_clip_intp2_rvi
|
|
static av_always_inline av_const int av_clip_intp2_rvi(int a, int p)
|
|
{
|
|
const int shift = 31 - p;
|
|
int b = ((int)(((unsigned)a) << shift)) >> shift;
|
|
|
|
if (a != b)
|
|
b = (a >> 31) ^ ((1 << p) - 1);
|
|
return b;
|
|
}
|
|
|
|
#if defined (__riscv_zbb) && (__riscv_zbb > 0) && HAVE_INLINE_ASM
|
|
|
|
#define av_popcount av_popcount_rvb
|
|
static av_always_inline av_const int av_popcount_rvb(uint32_t x)
|
|
{
|
|
int ret;
|
|
|
|
#if (__riscv_xlen >= 64)
|
|
__asm__ ("cpopw %0, %1\n" : "=r" (ret) : "r" (x));
|
|
#else
|
|
__asm__ ("cpop %0, %1\n" : "=r" (ret) : "r" (x));
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
#if (__riscv_xlen >= 64)
|
|
#define av_popcount64 av_popcount64_rvb
|
|
static av_always_inline av_const int av_popcount64_rvb(uint64_t x)
|
|
{
|
|
int ret;
|
|
|
|
#if (__riscv_xlen >= 128)
|
|
__asm__ ("cpopd %0, %1\n" : "=r" (ret) : "r" (x));
|
|
#else
|
|
__asm__ ("cpop %0, %1\n" : "=r" (ret) : "r" (x));
|
|
#endif
|
|
return ret;
|
|
}
|
|
#endif /* __riscv_xlen >= 64 */
|
|
#endif /* __riscv_zbb */
|
|
|
|
#endif /* AVUTIL_RISCV_INTMATH_H */
|