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; Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
; Use of this source code is governed by a BSD-style license and patent
; grant that can be found in the LICENSE file in the root of the source
; tree. All contributing project authors may be found in the AUTHORS
; file in the root of the source tree.
EXPORT |vp8_recon_b_neon|
; r0 unsigned char *pred_ptr,
; r1 short *diff_ptr,
; r2 unsigned char *dst_ptr,
; r3 int stride
|vp8_recon_b_neon| PROC
mov r12, #16
vld1.u8 {d28}, [r0], r12 ;load 4 data/line from pred_ptr
vld1.16 {q10, q11}, [r1]! ;load data from diff_ptr
vld1.u8 {d29}, [r0], r12
vld1.16 {q11, q12}, [r1]!
vld1.u8 {d30}, [r0], r12
vld1.16 {q12, q13}, [r1]!
vld1.u8 {d31}, [r0], r12
vld1.16 {q13}, [r1]
vmovl.u8 q0, d28 ;modify Pred data from 8 bits to 16 bits
vmovl.u8 q1, d29 ;Pred data in d0, d2, d4, d6
vmovl.u8 q2, d30
vmovl.u8 q3, d31
vadd.s16 d0, d0, d20 ;add Diff data and Pred data together
vadd.s16 d2, d2, d22
vadd.s16 d4, d4, d24
vadd.s16 d6, d6, d26
vqmovun.s16 d0, q0 ;CLAMP() saturation
vqmovun.s16 d1, q1
vqmovun.s16 d2, q2
vqmovun.s16 d3, q3
add r1, r2, r3
vst1.32 {d0[0]}, [r2] ;store result
vst1.32 {d1[0]}, [r1], r3
add r2, r1, r3
vst1.32 {d2[0]}, [r1]
vst1.32 {d3[0]}, [r2], r3
bx lr