68 lines
1.9 KiB
NASM
68 lines
1.9 KiB
NASM
;
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license and patent
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; grant that can be found in the LICENSE file in the root of the source
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; tree. All contributing project authors may be found in the AUTHORS
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; file in the root of the source tree.
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;
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EXPORT |vp8_dc_only_idct_add_v6|
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AREA |.text|, CODE, READONLY
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;void vp8_dc_only_idct_add_v6(short input_dc, unsigned char *pred_ptr,
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; unsigned char *dst_ptr, int pitch, int stride)
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; r0 input_dc
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; r1 pred_ptr
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; r2 dest_ptr
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; r3 pitch
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; sp stride
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|vp8_dc_only_idct_add_v6| PROC
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stmdb sp!, {r4 - r7, lr}
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add r0, r0, #4 ; input_dc += 4
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ldr r12, c0x0000FFFF
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ldr r4, [r1], r3
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ldr r6, [r1], r3
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and r0, r12, r0, asr #3 ; input_dc >> 3 + mask
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ldr lr, [sp, #20]
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orr r0, r0, r0, lsl #16 ; a1 | a1
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uxtab16 r5, r0, r4 ; a1+2 | a1+0
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uxtab16 r4, r0, r4, ror #8 ; a1+3 | a1+1
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uxtab16 r7, r0, r6
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uxtab16 r6, r0, r6, ror #8
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usat16 r5, #8, r5
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usat16 r4, #8, r4
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usat16 r7, #8, r7
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usat16 r6, #8, r6
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orr r5, r5, r4, lsl #8
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orr r7, r7, r6, lsl #8
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ldr r4, [r1], r3
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ldr r6, [r1]
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str r5, [r2], lr
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str r7, [r2], lr
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uxtab16 r5, r0, r4
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uxtab16 r4, r0, r4, ror #8
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uxtab16 r7, r0, r6
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uxtab16 r6, r0, r6, ror #8
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usat16 r5, #8, r5
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usat16 r4, #8, r4
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usat16 r7, #8, r7
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usat16 r6, #8, r6
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orr r5, r5, r4, lsl #8
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orr r7, r7, r6, lsl #8
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str r5, [r2], lr
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str r7, [r2]
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ldmia sp!, {r4 - r7, pc}
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ENDP ; |vp8_dc_only_idct_add_v6|
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; Constant Pool
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c0x0000FFFF DCD 0x0000FFFF
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END
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