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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_recon4b_neon|
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
; r0 unsigned char *pred_ptr,
; r1 short *diff_ptr,
; r2 unsigned char *dst_ptr,
; r3 int stride
|vp8_recon4b_neon| PROC
vld1.u8 {q12, q13}, [r0]! ;load data from pred_ptr
vld1.16 {q8, q9}, [r1]! ;load data from diff_ptr
vld1.u8 {q14, q15}, [r0]
vld1.16 {q10, q11}, [r1]!
vmovl.u8 q0, d24 ;modify Pred data from 8 bits to 16 bits
vmovl.u8 q1, d25
vmovl.u8 q2, d26
vmovl.u8 q3, d27
vmovl.u8 q4, d28
vmovl.u8 q5, d29
vmovl.u8 q6, d30
vld1.16 {q12, q13}, [r1]!
vmovl.u8 q7, d31
vld1.16 {q14, q15}, [r1]
vadd.s16 q0, q0, q8 ;add Diff data and Pred data together
vadd.s16 q1, q1, q9
vadd.s16 q2, q2, q10
vadd.s16 q3, q3, q11
vadd.s16 q4, q4, q12
vadd.s16 q5, q5, q13
vadd.s16 q6, q6, q14
vadd.s16 q7, q7, q15
vqmovun.s16 d0, q0 ;CLAMP() saturation
vqmovun.s16 d1, q1
vqmovun.s16 d2, q2
vqmovun.s16 d3, q3
vqmovun.s16 d4, q4
vqmovun.s16 d5, q5
vqmovun.s16 d6, q6
vqmovun.s16 d7, q7
add r0, r2, r3
vst1.u8 {q0}, [r2] ;store result
vst1.u8 {q1}, [r0], r3
add r2, r0, r3
vst1.u8 {q2}, [r0]
vst1.u8 {q3}, [r2], r3
bx lr
ENDP
END