1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 12 EXPORT |vp8_recon_b_neon| 13 ARM 14 REQUIRE8 15 PRESERVE8 16 17 AREA ||.text||, CODE, READONLY, ALIGN=2 18 19 ; r0 unsigned char *pred_ptr, 20 ; r1 short *diff_ptr, 21 ; r2 unsigned char *dst_ptr, 22 ; r3 int stride 23 24 |vp8_recon_b_neon| PROC 25 mov r12, #16 26 27 vld1.u8 {d28}, [r0], r12 ;load 4 data/line from pred_ptr 28 vld1.16 {q10, q11}, [r1]! ;load data from diff_ptr 29 vld1.u8 {d29}, [r0], r12 30 vld1.16 {q11, q12}, [r1]! 31 vld1.u8 {d30}, [r0], r12 32 vld1.16 {q12, q13}, [r1]! 33 vld1.u8 {d31}, [r0], r12 34 vld1.16 {q13}, [r1] 35 36 vmovl.u8 q0, d28 ;modify Pred data from 8 bits to 16 bits 37 vmovl.u8 q1, d29 ;Pred data in d0, d2, d4, d6 38 vmovl.u8 q2, d30 39 vmovl.u8 q3, d31 40 41 vadd.s16 d0, d0, d20 ;add Diff data and Pred data together 42 vadd.s16 d2, d2, d22 43 vadd.s16 d4, d4, d24 44 vadd.s16 d6, d6, d26 45 46 vqmovun.s16 d0, q0 ;CLAMP() saturation 47 vqmovun.s16 d1, q1 48 vqmovun.s16 d2, q2 49 vqmovun.s16 d3, q3 50 add r1, r2, r3 51 52 vst1.32 {d0[0]}, [r2] ;store result 53 vst1.32 {d1[0]}, [r1], r3 54 add r2, r1, r3 55 vst1.32 {d2[0]}, [r1] 56 vst1.32 {d3[0]}, [r2], r3 57 58 bx lr 59 60 ENDP 61 END 62
