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_memcpy_partial_neon| 13 14 ARM 15 REQUIRE8 16 PRESERVE8 17 18 AREA ||.text||, CODE, READONLY, ALIGN=2 19 ;========================================= 20 ;this is not a full memcpy function!!! 21 ;void vp8_memcpy_partial_neon(unsigned char *dst_ptr, unsigned char *src_ptr, 22 ; int sz); 23 |vp8_memcpy_partial_neon| PROC 24 ;pld [r1] ;preload pred data 25 ;pld [r1, #128] 26 ;pld [r1, #256] 27 ;pld [r1, #384] 28 29 mov r12, r2, lsr #8 ;copy 256 bytes data at one time 30 31 memcpy_neon_loop 32 vld1.8 {q0, q1}, [r1]! ;load src data 33 subs r12, r12, #1 34 vld1.8 {q2, q3}, [r1]! 35 vst1.8 {q0, q1}, [r0]! ;copy to dst_ptr 36 vld1.8 {q4, q5}, [r1]! 37 vst1.8 {q2, q3}, [r0]! 38 vld1.8 {q6, q7}, [r1]! 39 vst1.8 {q4, q5}, [r0]! 40 vld1.8 {q8, q9}, [r1]! 41 vst1.8 {q6, q7}, [r0]! 42 vld1.8 {q10, q11}, [r1]! 43 vst1.8 {q8, q9}, [r0]! 44 vld1.8 {q12, q13}, [r1]! 45 vst1.8 {q10, q11}, [r0]! 46 vld1.8 {q14, q15}, [r1]! 47 vst1.8 {q12, q13}, [r0]! 48 vst1.8 {q14, q15}, [r0]! 49 50 ;pld [r1] ;preload pred data -- need to adjust for real device 51 ;pld [r1, #128] 52 ;pld [r1, #256] 53 ;pld [r1, #384] 54 55 bne memcpy_neon_loop 56 57 ands r3, r2, #0xff ;extra copy 58 beq done_copy_neon_loop 59 60 extra_copy_neon_loop 61 vld1.8 {q0}, [r1]! ;load src data 62 subs r3, r3, #16 63 vst1.8 {q0}, [r0]! 64 bne extra_copy_neon_loop 65 66 done_copy_neon_loop 67 bx lr 68 ENDP 69 70 END 71
