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120 lines
4.3 KiB
120 lines
4.3 KiB
@ |
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@ ARMv4-optimized IDCT functions |
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@ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp> |
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@ |
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@ This file is part of Libav. |
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@ |
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@ Libav is free software; you can redistribute it and/or |
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@ modify it under the terms of the GNU Lesser General Public |
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@ License as published by the Free Software Foundation; either |
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@ version 2.1 of the License, or (at your option) any later version. |
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@ |
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@ Libav is distributed in the hope that it will be useful, |
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@ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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@ Lesser General Public License for more details. |
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@ |
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@ You should have received a copy of the GNU Lesser General Public |
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@ License along with Libav; if not, write to the Free Software |
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@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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@ |
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#include "config.h" |
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#include "libavutil/arm/asm.S" |
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@ void ff_add_pixels_clamped_arm(int16_t *block, uint8_t *dest, int stride) |
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function ff_add_pixels_clamped_arm, export=1, align=5 |
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push {r4-r10} |
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mov r10, #8 |
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1: |
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ldr r4, [r1] /* load dest */ |
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/* block[0] and block[1]*/ |
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ldrsh r5, [r0] |
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ldrsh r7, [r0, #2] |
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and r6, r4, #0xFF |
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and r8, r4, #0xFF00 |
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add r6, r6, r5 |
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add r8, r7, r8, lsr #8 |
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mvn r5, r5 |
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mvn r7, r7 |
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tst r6, #0x100 |
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it ne |
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movne r6, r5, lsr #24 |
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tst r8, #0x100 |
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it ne |
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movne r8, r7, lsr #24 |
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mov r9, r6 |
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ldrsh r5, [r0, #4] /* moved form [A] */ |
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orr r9, r9, r8, lsl #8 |
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/* block[2] and block[3] */ |
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/* [A] */ |
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ldrsh r7, [r0, #6] |
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and r6, r4, #0xFF0000 |
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and r8, r4, #0xFF000000 |
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add r6, r5, r6, lsr #16 |
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add r8, r7, r8, lsr #24 |
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mvn r5, r5 |
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mvn r7, r7 |
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tst r6, #0x100 |
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it ne |
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movne r6, r5, lsr #24 |
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tst r8, #0x100 |
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it ne |
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movne r8, r7, lsr #24 |
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orr r9, r9, r6, lsl #16 |
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ldr r4, [r1, #4] /* moved form [B] */ |
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orr r9, r9, r8, lsl #24 |
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/* store dest */ |
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ldrsh r5, [r0, #8] /* moved form [C] */ |
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str r9, [r1] |
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/* load dest */ |
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/* [B] */ |
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/* block[4] and block[5] */ |
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/* [C] */ |
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ldrsh r7, [r0, #10] |
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and r6, r4, #0xFF |
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and r8, r4, #0xFF00 |
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add r6, r6, r5 |
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add r8, r7, r8, lsr #8 |
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mvn r5, r5 |
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mvn r7, r7 |
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tst r6, #0x100 |
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it ne |
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movne r6, r5, lsr #24 |
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tst r8, #0x100 |
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it ne |
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movne r8, r7, lsr #24 |
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mov r9, r6 |
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ldrsh r5, [r0, #12] /* moved from [D] */ |
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orr r9, r9, r8, lsl #8 |
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/* block[6] and block[7] */ |
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/* [D] */ |
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ldrsh r7, [r0, #14] |
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and r6, r4, #0xFF0000 |
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and r8, r4, #0xFF000000 |
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add r6, r5, r6, lsr #16 |
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add r8, r7, r8, lsr #24 |
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mvn r5, r5 |
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mvn r7, r7 |
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tst r6, #0x100 |
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it ne |
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movne r6, r5, lsr #24 |
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tst r8, #0x100 |
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it ne |
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movne r8, r7, lsr #24 |
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orr r9, r9, r6, lsl #16 |
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add r0, r0, #16 /* moved from [E] */ |
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orr r9, r9, r8, lsl #24 |
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subs r10, r10, #1 /* moved from [F] */ |
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/* store dest */ |
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str r9, [r1, #4] |
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/* [E] */ |
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/* [F] */ |
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add r1, r1, r2 |
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bne 1b |
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pop {r4-r10} |
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bx lr |
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endfunc
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