| @ | |
| @ ARMv4-optimized IDCT functions | |
| @ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp> | |
| @ | |
| @ 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 | |
| @ | |
| #include "config.h" | |
| #include "libavutil/arm/asm.S" | |
| @ void ff_add_pixels_clamped_arm(int16_t *block, uint8_t *dest, ptrdiff_t stride) | |
| function ff_add_pixels_clamped_arm, =1, =5 | |
| push {r4-r10} | |
| mov r10, #8 | |
| 1: | |
| ldr r4, [r1] /* load dest */ | |
| /* block[0] and block[1]*/ | |
| ldrsh r5, [r0] | |
| ldrsh r7, [r0, #2] | |
| and r6, r4, #0xFF | |
| and r8, r4, #0xFF00 | |
| add r6, r6, r5 | |
| add r8, r7, r8, lsr #8 | |
| mvn r5, r5 | |
| mvn r7, r7 | |
| tst r6, #0x100 | |
| it ne | |
| movne r6, r5, lsr #24 | |
| tst r8, #0x100 | |
| it ne | |
| movne r8, r7, lsr #24 | |
| mov r9, r6 | |
| ldrsh r5, [r0, #4] /* moved form [A] */ | |
| orr r9, r9, r8, lsl #8 | |
| /* block[2] and block[3] */ | |
| /* [A] */ | |
| ldrsh r7, [r0, #6] | |
| and r6, r4, #0xFF0000 | |
| and r8, r4, #0xFF000000 | |
| add r6, r5, r6, lsr #16 | |
| add r8, r7, r8, lsr #24 | |
| mvn r5, r5 | |
| mvn r7, r7 | |
| tst r6, #0x100 | |
| it ne | |
| movne r6, r5, lsr #24 | |
| tst r8, #0x100 | |
| it ne | |
| movne r8, r7, lsr #24 | |
| orr r9, r9, r6, lsl #16 | |
| ldr r4, [r1, #4] /* moved form [B] */ | |
| orr r9, r9, r8, lsl #24 | |
| /* store dest */ | |
| ldrsh r5, [r0, #8] /* moved form [C] */ | |
| str r9, [r1] | |
| /* load dest */ | |
| /* [B] */ | |
| /* block[4] and block[5] */ | |
| /* [C] */ | |
| ldrsh r7, [r0, #10] | |
| and r6, r4, #0xFF | |
| and r8, r4, #0xFF00 | |
| add r6, r6, r5 | |
| add r8, r7, r8, lsr #8 | |
| mvn r5, r5 | |
| mvn r7, r7 | |
| tst r6, #0x100 | |
| it ne | |
| movne r6, r5, lsr #24 | |
| tst r8, #0x100 | |
| it ne | |
| movne r8, r7, lsr #24 | |
| mov r9, r6 | |
| ldrsh r5, [r0, #12] /* moved from [D] */ | |
| orr r9, r9, r8, lsl #8 | |
| /* block[6] and block[7] */ | |
| /* [D] */ | |
| ldrsh r7, [r0, #14] | |
| and r6, r4, #0xFF0000 | |
| and r8, r4, #0xFF000000 | |
| add r6, r5, r6, lsr #16 | |
| add r8, r7, r8, lsr #24 | |
| mvn r5, r5 | |
| mvn r7, r7 | |
| tst r6, #0x100 | |
| it ne | |
| movne r6, r5, lsr #24 | |
| tst r8, #0x100 | |
| it ne | |
| movne r8, r7, lsr #24 | |
| orr r9, r9, r6, lsl #16 | |
| add r0, r0, #16 /* moved from [E] */ | |
| orr r9, r9, r8, lsl #24 | |
| subs r10, r10, #1 /* moved from [F] */ | |
| /* store dest */ | |
| str r9, [r1, #4] | |
| /* [E] */ | |
| /* [F] */ | |
| add r1, r1, r2 | |
| bne 1b | |
| pop {r4-r10} | |
| bx lr | |
| endfunc | |