| 1 | /* |
| 2 | * Copyright (c) 2010 Mans Rullgard <mans@mansr.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_ARM_INTMATH_H |
| 22 | #define AVUTIL_ARM_INTMATH_H |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | #include "config.h" |
| 27 | #include "libavutil/attributes.h" |
| 28 | |
| 29 | #if HAVE_INLINE_ASM |
| 30 | |
| 31 | #if HAVE_ARMV6_INLINE |
| 32 | |
| 33 | #define av_clip_uint8 av_clip_uint8_arm |
| 34 | static av_always_inline av_const unsigned av_clip_uint8_arm(int a) |
| 35 | { |
| 36 | unsigned x; |
| 37 | __asm__ ("usat %0, #8, %1" : "=r"(x) : "r"(a)); |
| 38 | return x; |
| 39 | } |
| 40 | |
| 41 | #define av_clip_int8 av_clip_int8_arm |
| 42 | static av_always_inline av_const int av_clip_int8_arm(int a) |
| 43 | { |
| 44 | int x; |
| 45 | __asm__ ("ssat %0, #8, %1" : "=r"(x) : "r"(a)); |
| 46 | return x; |
| 47 | } |
| 48 | |
| 49 | #define av_clip_uint16 av_clip_uint16_arm |
| 50 | static av_always_inline av_const unsigned av_clip_uint16_arm(int a) |
| 51 | { |
| 52 | unsigned x; |
| 53 | __asm__ ("usat %0, #16, %1" : "=r"(x) : "r"(a)); |
| 54 | return x; |
| 55 | } |
| 56 | |
| 57 | #define av_clip_int16 av_clip_int16_arm |
| 58 | static av_always_inline av_const int av_clip_int16_arm(int a) |
| 59 | { |
| 60 | int x; |
| 61 | __asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a)); |
| 62 | return x; |
| 63 | } |
| 64 | |
| 65 | #define av_clip_uintp2 av_clip_uintp2_arm |
| 66 | static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p) |
| 67 | { |
| 68 | unsigned x; |
| 69 | __asm__ ("usat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p)); |
| 70 | return x; |
| 71 | } |
| 72 | |
| 73 | #define av_sat_add32 av_sat_add32_arm |
| 74 | static av_always_inline int av_sat_add32_arm(int a, int b) |
| 75 | { |
| 76 | int r; |
| 77 | __asm__ ("qadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); |
| 78 | return r; |
| 79 | } |
| 80 | |
| 81 | #define av_sat_dadd32 av_sat_dadd32_arm |
| 82 | static av_always_inline int av_sat_dadd32_arm(int a, int b) |
| 83 | { |
| 84 | int r; |
| 85 | __asm__ ("qdadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); |
| 86 | return r; |
| 87 | } |
| 88 | |
| 89 | #endif /* HAVE_ARMV6_INLINE */ |
| 90 | |
| 91 | #if HAVE_ASM_MOD_Q |
| 92 | |
| 93 | #define av_clipl_int32 av_clipl_int32_arm |
| 94 | static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a) |
| 95 | { |
| 96 | int x, y; |
| 97 | __asm__ ("adds %1, %R2, %Q2, lsr #31 \n\t" |
| 98 | "itet ne \n\t" |
| 99 | "mvnne %1, #1<<31 \n\t" |
| 100 | "moveq %0, %Q2 \n\t" |
| 101 | "eorne %0, %1, %R2, asr #31 \n\t" |
| 102 | : "=r"(x), "=&r"(y) : "r"(a) : "cc"); |
| 103 | return x; |
| 104 | } |
| 105 | |
| 106 | #endif /* HAVE_ASM_MOD_Q */ |
| 107 | |
| 108 | #endif /* HAVE_INLINE_ASM */ |
| 109 | |
| 110 | #endif /* AVUTIL_ARM_INTMATH_H */ |