62 lines
1.8 KiB
NASM
62 lines
1.8 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
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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EXPORT |vp8_recon_b_neon|
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ARM
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REQUIRE8
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PRESERVE8
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AREA ||.text||, CODE, READONLY, ALIGN=2
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; r0 unsigned char *pred_ptr,
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; r1 short *diff_ptr,
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; r2 unsigned char *dst_ptr,
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; r3 int stride
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|vp8_recon_b_neon| PROC
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mov r12, #16
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vld1.u8 {d28}, [r0], r12 ;load 4 data/line from pred_ptr
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vld1.16 {q10, q11}, [r1]! ;load data from diff_ptr
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vld1.u8 {d29}, [r0], r12
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vld1.16 {q11, q12}, [r1]!
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vld1.u8 {d30}, [r0], r12
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vld1.16 {q12, q13}, [r1]!
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vld1.u8 {d31}, [r0], r12
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vld1.16 {q13}, [r1]
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vmovl.u8 q0, d28 ;modify Pred data from 8 bits to 16 bits
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vmovl.u8 q1, d29 ;Pred data in d0, d2, d4, d6
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vmovl.u8 q2, d30
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vmovl.u8 q3, d31
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vadd.s16 d0, d0, d20 ;add Diff data and Pred data together
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vadd.s16 d2, d2, d22
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vadd.s16 d4, d4, d24
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vadd.s16 d6, d6, d26
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vqmovun.s16 d0, q0 ;CLAMP() saturation
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vqmovun.s16 d1, q1
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vqmovun.s16 d2, q2
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vqmovun.s16 d3, q3
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add r1, r2, r3
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vst1.32 {d0[0]}, [r2] ;store result
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vst1.32 {d1[0]}, [r1], r3
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add r2, r1, r3
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vst1.32 {d2[0]}, [r1]
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vst1.32 {d3[0]}, [r2], r3
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bx lr
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ENDP
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END
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