| @ |
| @ 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, export=1, align=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 |
