repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * simple math operations | |
| 3 | * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef AVCODEC_ARM_MATHOPS_H | |
| 23 | #define AVCODEC_ARM_MATHOPS_H | |
| 24 | ||
| 25 | #include <stdint.h> | |
| 26 | #include "config.h" | |
| 27 | #include "libavutil/common.h" | |
| 28 | ||
| 29 | #if HAVE_INLINE_ASM | |
| 30 | ||
| 31 | #if HAVE_ARMV6_INLINE | |
| 32 | #define MULH MULH | |
| 33 | static inline av_const int MULH(int a, int b) | |
| 34 | { | |
| 35 | int r; | |
| 36 | __asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); | |
| 37 | return r; | |
| 38 | } | |
| 39 | ||
| 40 | #define FASTDIV FASTDIV | |
| 41 | static av_always_inline av_const int FASTDIV(int a, int b) | |
| 42 | { | |
| 43 | int r; | |
| 44 | __asm__ ("cmp %2, #2 \n\t" | |
| 45 | "ldr %0, [%3, %2, lsl #2] \n\t" | |
| 46 | "ite le \n\t" | |
| 47 | "lsrle %0, %1, #1 \n\t" | |
| 48 | "smmulgt %0, %0, %1 \n\t" | |
| 49 | : "=&r"(r) : "r"(a), "r"(b), "r"(ff_inverse) : "cc"); | |
| 50 | return r; | |
| 51 | } | |
| 52 | ||
| 53 | #else /* HAVE_ARMV6_INLINE */ | |
| 54 | ||
| 55 | #define FASTDIV FASTDIV | |
| 56 | static av_always_inline av_const int FASTDIV(int a, int b) | |
| 57 | { | |
| 58 | int r, t; | |
| 59 | __asm__ ("umull %1, %0, %2, %3" | |
| 60 | : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b])); | |
| 61 | return r; | |
| 62 | } | |
| 63 | #endif | |
| 64 | ||
| 65 | #define MLS64(d, a, b) MAC64(d, -(a), b) | |
| 66 | ||
| 67 | #if HAVE_ARMV5TE_INLINE | |
| 68 | ||
| 69 | /* signed 16x16 -> 32 multiply add accumulate */ | |
| 70 | # define MAC16(rt, ra, rb) \ | |
| 71 | __asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb)); | |
| 72 | ||
| 73 | /* signed 16x16 -> 32 multiply */ | |
| 74 | # define MUL16 MUL16 | |
| 75 | static inline av_const int MUL16(int ra, int rb) | |
| 76 | { | |
| 77 | int rt; | |
| 78 | __asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb)); | |
| 79 | return rt; | |
| 80 | } | |
| 81 | ||
| 82 | #endif | |
| 83 | ||
| 84 | #define mid_pred mid_pred | |
| 85 | static inline av_const int mid_pred(int a, int b, int c) | |
| 86 | { | |
| 87 | int m; | |
| 88 | __asm__ ( | |
| 89 | "mov %0, %2 \n\t" | |
| 90 | "cmp %1, %2 \n\t" | |
| 91 | "itt gt \n\t" | |
| 92 | "movgt %0, %1 \n\t" | |
| 93 | "movgt %1, %2 \n\t" | |
| 94 | "cmp %1, %3 \n\t" | |
| 95 | "it le \n\t" | |
| 96 | "movle %1, %3 \n\t" | |
| 97 | "cmp %0, %1 \n\t" | |
| 98 | "it gt \n\t" | |
| 99 | "movgt %0, %1 \n\t" | |
| 100 | : "=&r"(m), "+r"(a) | |
| 101 | : "r"(b), "r"(c) | |
| 102 | : "cc"); | |
| 103 | return m; | |
| 104 | } | |
| 105 | ||
| 106 | #endif /* HAVE_INLINE_ASM */ | |
| 107 | ||
| 108 | #endif /* AVCODEC_ARM_MATHOPS_H */ |