| Line | Branch | Exec | Source |
|---|---|---|---|
| 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_X86_MATHOPS_H | ||
| 23 | #define AVCODEC_X86_MATHOPS_H | ||
| 24 | |||
| 25 | #include "config.h" | ||
| 26 | |||
| 27 | #include "libavutil/common.h" | ||
| 28 | #include "libavutil/x86/asm.h" | ||
| 29 | |||
| 30 | #if HAVE_INLINE_ASM | ||
| 31 | |||
| 32 | #if ARCH_X86_32 | ||
| 33 | |||
| 34 | #define MULL MULL | ||
| 35 | static av_always_inline av_const int MULL(int a, int b, unsigned shift) | ||
| 36 | { | ||
| 37 | int rt, dummy; | ||
| 38 | if (__builtin_constant_p(shift)) | ||
| 39 | __asm__ ( | ||
| 40 | "imull %3 \n\t" | ||
| 41 | "shrdl %4, %%edx, %%eax \n\t" | ||
| 42 | :"=a"(rt), "=d"(dummy) | ||
| 43 | :"a"(a), "rm"(b), "i"(shift & 0x1F) | ||
| 44 | ); | ||
| 45 | else | ||
| 46 | __asm__ ( | ||
| 47 | "imull %3 \n\t" | ||
| 48 | "shrdl %4, %%edx, %%eax \n\t" | ||
| 49 | :"=a"(rt), "=d"(dummy) | ||
| 50 | :"a"(a), "rm"(b), "c"((uint8_t)shift) | ||
| 51 | ); | ||
| 52 | return rt; | ||
| 53 | } | ||
| 54 | |||
| 55 | #define MULH MULH | ||
| 56 | static av_always_inline av_const int MULH(int a, int b) | ||
| 57 | { | ||
| 58 | int rt, dummy; | ||
| 59 | __asm__ ( | ||
| 60 | "imull %3" | ||
| 61 | :"=d"(rt), "=a"(dummy) | ||
| 62 | :"a"(a), "rm"(b) | ||
| 63 | ); | ||
| 64 | return rt; | ||
| 65 | } | ||
| 66 | |||
| 67 | #define MUL64 MUL64 | ||
| 68 | static av_always_inline av_const int64_t MUL64(int a, int b) | ||
| 69 | { | ||
| 70 | int64_t rt; | ||
| 71 | __asm__ ( | ||
| 72 | "imull %2" | ||
| 73 | :"=A"(rt) | ||
| 74 | :"a"(a), "rm"(b) | ||
| 75 | ); | ||
| 76 | return rt; | ||
| 77 | } | ||
| 78 | |||
| 79 | #endif /* ARCH_X86_32 */ | ||
| 80 | |||
| 81 | #if HAVE_I686 | ||
| 82 | /* median of 3 */ | ||
| 83 | #define mid_pred mid_pred | ||
| 84 | 905009055 | static inline av_const int mid_pred(int a, int b, int c) | |
| 85 | { | ||
| 86 | 905009055 | int i=b; | |
| 87 | 905009055 | __asm__ ( | |
| 88 | "cmp %2, %1 \n\t" | ||
| 89 | "cmovg %1, %0 \n\t" | ||
| 90 | "cmovg %2, %1 \n\t" | ||
| 91 | "cmp %3, %1 \n\t" | ||
| 92 | "cmovl %3, %1 \n\t" | ||
| 93 | "cmp %1, %0 \n\t" | ||
| 94 | "cmovg %1, %0 \n\t" | ||
| 95 | :"+&r"(i), "+&r"(a) | ||
| 96 | :"r"(b), "r"(c) | ||
| 97 | ); | ||
| 98 | 905009055 | return i; | |
| 99 | } | ||
| 100 | |||
| 101 | #if HAVE_6REGS | ||
| 102 | #define COPY3_IF_LT(x, y, a, b, c, d)\ | ||
| 103 | __asm__ volatile(\ | ||
| 104 | "cmpl %0, %3 \n\t"\ | ||
| 105 | "cmovl %3, %0 \n\t"\ | ||
| 106 | "cmovl %4, %1 \n\t"\ | ||
| 107 | "cmovl %5, %2 \n\t"\ | ||
| 108 | : "+&r" (x), "+&r" (a), "+r" (c)\ | ||
| 109 | : "r" (y), "r" (b), "r" (d)\ | ||
| 110 | ); | ||
| 111 | #endif /* HAVE_6REGS */ | ||
| 112 | |||
| 113 | #endif /* HAVE_I686 */ | ||
| 114 | |||
| 115 | #define MASK_ABS(mask, level) \ | ||
| 116 | __asm__ ("cdq \n\t" \ | ||
| 117 | "xorl %1, %0 \n\t" \ | ||
| 118 | "subl %1, %0 \n\t" \ | ||
| 119 | : "+a"(level), "=&d"(mask)) | ||
| 120 | |||
| 121 | // avoid +32 for shift optimization (gcc should do that ...) | ||
| 122 | #define NEG_SSR32 NEG_SSR32 | ||
| 123 | 400260676 | static inline int32_t NEG_SSR32( int32_t a, int8_t s){ | |
| 124 | if (__builtin_constant_p(s)) | ||
| 125 | __asm__ ("sarl %1, %0\n\t" | ||
| 126 | : "+r" (a) | ||
| 127 | : "i" (-s & 0x1F) | ||
| 128 | ); | ||
| 129 | else | ||
| 130 | 400260676 | __asm__ ("sarl %1, %0\n\t" | |
| 131 | : "+r" (a) | ||
| 132 | 400260676 | : "c" ((uint8_t)(-s)) | |
| 133 | ); | ||
| 134 | 400260676 | return a; | |
| 135 | } | ||
| 136 | |||
| 137 | #define NEG_USR32 NEG_USR32 | ||
| 138 | 1830894074 | static inline uint32_t NEG_USR32(uint32_t a, int8_t s){ | |
| 139 | if (__builtin_constant_p(s)) | ||
| 140 | __asm__ ("shrl %1, %0\n\t" | ||
| 141 | : "+r" (a) | ||
| 142 | : "i" (-s & 0x1F) | ||
| 143 | ); | ||
| 144 | else | ||
| 145 | 1830894074 | __asm__ ("shrl %1, %0\n\t" | |
| 146 | : "+r" (a) | ||
| 147 | 1830894074 | : "c" ((uint8_t)(-s)) | |
| 148 | ); | ||
| 149 | 1830894074 | return a; | |
| 150 | } | ||
| 151 | |||
| 152 | #endif /* HAVE_INLINE_ASM */ | ||
| 153 | #endif /* AVCODEC_X86_MATHOPS_H */ | ||
| 154 |