repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | @ |
| 2 | @ ARMv4-optimized IDCT functions | |
| 3 | @ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp> | |
| 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 | #include "config.h" | |
| 23 | #include "libavutil/arm/asm.S" | |
| 24 | ||
| f6fa7814 | 25 | @ void ff_add_pixels_clamped_arm(int16_t *block, uint8_t *dest, ptrdiff_t stride) |
| 2ba45a60 DM |
26 | function ff_add_pixels_clamped_arm, export=1, align=5 |
| 27 | push {r4-r10} | |
| 28 | mov r10, #8 | |
| 29 | 1: | |
| 30 | ldr r4, [r1] /* load dest */ | |
| 31 | /* block[0] and block[1]*/ | |
| 32 | ldrsh r5, [r0] | |
| 33 | ldrsh r7, [r0, #2] | |
| 34 | and r6, r4, #0xFF | |
| 35 | and r8, r4, #0xFF00 | |
| 36 | add r6, r6, r5 | |
| 37 | add r8, r7, r8, lsr #8 | |
| 38 | mvn r5, r5 | |
| 39 | mvn r7, r7 | |
| 40 | tst r6, #0x100 | |
| 41 | it ne | |
| 42 | movne r6, r5, lsr #24 | |
| 43 | tst r8, #0x100 | |
| 44 | it ne | |
| 45 | movne r8, r7, lsr #24 | |
| 46 | mov r9, r6 | |
| 47 | ldrsh r5, [r0, #4] /* moved form [A] */ | |
| 48 | orr r9, r9, r8, lsl #8 | |
| 49 | /* block[2] and block[3] */ | |
| 50 | /* [A] */ | |
| 51 | ldrsh r7, [r0, #6] | |
| 52 | and r6, r4, #0xFF0000 | |
| 53 | and r8, r4, #0xFF000000 | |
| 54 | add r6, r5, r6, lsr #16 | |
| 55 | add r8, r7, r8, lsr #24 | |
| 56 | mvn r5, r5 | |
| 57 | mvn r7, r7 | |
| 58 | tst r6, #0x100 | |
| 59 | it ne | |
| 60 | movne r6, r5, lsr #24 | |
| 61 | tst r8, #0x100 | |
| 62 | it ne | |
| 63 | movne r8, r7, lsr #24 | |
| 64 | orr r9, r9, r6, lsl #16 | |
| 65 | ldr r4, [r1, #4] /* moved form [B] */ | |
| 66 | orr r9, r9, r8, lsl #24 | |
| 67 | /* store dest */ | |
| 68 | ldrsh r5, [r0, #8] /* moved form [C] */ | |
| 69 | str r9, [r1] | |
| 70 | ||
| 71 | /* load dest */ | |
| 72 | /* [B] */ | |
| 73 | /* block[4] and block[5] */ | |
| 74 | /* [C] */ | |
| 75 | ldrsh r7, [r0, #10] | |
| 76 | and r6, r4, #0xFF | |
| 77 | and r8, r4, #0xFF00 | |
| 78 | add r6, r6, r5 | |
| 79 | add r8, r7, r8, lsr #8 | |
| 80 | mvn r5, r5 | |
| 81 | mvn r7, r7 | |
| 82 | tst r6, #0x100 | |
| 83 | it ne | |
| 84 | movne r6, r5, lsr #24 | |
| 85 | tst r8, #0x100 | |
| 86 | it ne | |
| 87 | movne r8, r7, lsr #24 | |
| 88 | mov r9, r6 | |
| 89 | ldrsh r5, [r0, #12] /* moved from [D] */ | |
| 90 | orr r9, r9, r8, lsl #8 | |
| 91 | /* block[6] and block[7] */ | |
| 92 | /* [D] */ | |
| 93 | ldrsh r7, [r0, #14] | |
| 94 | and r6, r4, #0xFF0000 | |
| 95 | and r8, r4, #0xFF000000 | |
| 96 | add r6, r5, r6, lsr #16 | |
| 97 | add r8, r7, r8, lsr #24 | |
| 98 | mvn r5, r5 | |
| 99 | mvn r7, r7 | |
| 100 | tst r6, #0x100 | |
| 101 | it ne | |
| 102 | movne r6, r5, lsr #24 | |
| 103 | tst r8, #0x100 | |
| 104 | it ne | |
| 105 | movne r8, r7, lsr #24 | |
| 106 | orr r9, r9, r6, lsl #16 | |
| 107 | add r0, r0, #16 /* moved from [E] */ | |
| 108 | orr r9, r9, r8, lsl #24 | |
| 109 | subs r10, r10, #1 /* moved from [F] */ | |
| 110 | /* store dest */ | |
| 111 | str r9, [r1, #4] | |
| 112 | ||
| 113 | /* [E] */ | |
| 114 | /* [F] */ | |
| 115 | add r1, r1, r2 | |
| 116 | bne 1b | |
| 117 | ||
| 118 | pop {r4-r10} | |
| 119 | bx lr | |
| 120 | endfunc |