ref: e5b8bd020a1f1fc85150e84f4cbefa23e9519e8c
dir: /vp8/encoder/arm/neon/vp8_memcpy_neon.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |vp8_memcpy_partial_neon|
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
;=========================================
;this is not a full memcpy function!!!
;void vp8_memcpy_partial_neon(unsigned char *dst_ptr, unsigned char *src_ptr,
; int sz);
|vp8_memcpy_partial_neon| PROC
vpush {d8-d15}
;pld [r1] ;preload pred data
;pld [r1, #128]
;pld [r1, #256]
;pld [r1, #384]
mov r12, r2, lsr #8 ;copy 256 bytes data at one time
memcpy_neon_loop
vld1.8 {q0, q1}, [r1]! ;load src data
subs r12, r12, #1
vld1.8 {q2, q3}, [r1]!
vst1.8 {q0, q1}, [r0]! ;copy to dst_ptr
vld1.8 {q4, q5}, [r1]!
vst1.8 {q2, q3}, [r0]!
vld1.8 {q6, q7}, [r1]!
vst1.8 {q4, q5}, [r0]!
vld1.8 {q8, q9}, [r1]!
vst1.8 {q6, q7}, [r0]!
vld1.8 {q10, q11}, [r1]!
vst1.8 {q8, q9}, [r0]!
vld1.8 {q12, q13}, [r1]!
vst1.8 {q10, q11}, [r0]!
vld1.8 {q14, q15}, [r1]!
vst1.8 {q12, q13}, [r0]!
vst1.8 {q14, q15}, [r0]!
;pld [r1] ;preload pred data -- need to adjust for real device
;pld [r1, #128]
;pld [r1, #256]
;pld [r1, #384]
bne memcpy_neon_loop
ands r3, r2, #0xff ;extra copy
beq done_copy_neon_loop
extra_copy_neon_loop
vld1.8 {q0}, [r1]! ;load src data
subs r3, r3, #16
vst1.8 {q0}, [r0]!
bne extra_copy_neon_loop
done_copy_neon_loop
vpop {d8-d15}
bx lr
ENDP
END