mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.7 KiB
103 lines
2.7 KiB
/* |
|
* 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 */
|
|
|