ref: a0944ba19fb4969fc6b3a55c7189a482a9cd3e4f
dir: /vpx_dsp/arm/vpx_convolve_copy_neon_asm.asm/
;
; Copyright (c) 2013 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 |vpx_convolve_copy_neon|
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
|vpx_convolve_copy_neon| PROC
push {r4-r5, lr}
ldrd r4, r5, [sp, #32]
cmp r4, #32
bgt copy64
beq copy32
cmp r4, #8
bgt copy16
beq copy8
b copy4
copy64
sub lr, r1, #32
sub r3, r3, #32
copy64_h
pld [r0, r1, lsl #1]
vld1.8 {q0-q1}, [r0]!
vld1.8 {q2-q3}, [r0], lr
vst1.8 {q0-q1}, [r2@128]!
vst1.8 {q2-q3}, [r2@128], r3
subs r5, r5, #1
bgt copy64_h
pop {r4-r5, pc}
copy32
pld [r0, r1, lsl #1]
vld1.8 {q0-q1}, [r0], r1
pld [r0, r1, lsl #1]
vld1.8 {q2-q3}, [r0], r1
vst1.8 {q0-q1}, [r2@128], r3
vst1.8 {q2-q3}, [r2@128], r3
subs r5, r5, #2
bgt copy32
pop {r4-r5, pc}
copy16
pld [r0, r1, lsl #1]
vld1.8 {q0}, [r0], r1
pld [r0, r1, lsl #1]
vld1.8 {q1}, [r0], r1
vst1.8 {q0}, [r2@128], r3
vst1.8 {q1}, [r2@128], r3
subs r5, r5, #2
bgt copy16
pop {r4-r5, pc}
copy8
pld [r0, r1, lsl #1]
vld1.8 {d0}, [r0], r1
pld [r0, r1, lsl #1]
vld1.8 {d2}, [r0], r1
vst1.8 {d0}, [r2@64], r3
vst1.8 {d2}, [r2@64], r3
subs r5, r5, #2
bgt copy8
pop {r4-r5, pc}
copy4
ldr r12, [r0], r1
str r12, [r2], r3
subs r5, r5, #1
bgt copy4
pop {r4-r5, pc}
ENDP
END