/******************************************************************************
* merge.S : ARM SVE mean
******************************************************************************
* Copyright (C) 2018 Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#include "../../arm/asm.S"
.arch armv8-a+sve
/* TODO: prefetch, unroll */
.text
.align 2
bti_advertise
function merge8_arm_sve
bti c
mov x4, #0
b 2f
1: ld1b {z0.h}, p0/z, [x1, x4]
ld1b {z1.h}, p0/z, [x2, x4]
add z0.h, z0.h, z1.h
lsr z0.h, z0.h, #1
st1b {z0.h}, p0, [x0, x4]
inch x4
2: whilelt p0.h, x4, x3
b.first 1b
ret
function merge16_arm_sve
bti c
lsr x3, x3, #1
mov x4, #0
b 2f
1: ld1h {z0.s}, p0/z, [x1, x4, lsl #1]
ld1h {z1.s}, p0/z, [x2, x4, lsl #1]
add z0.s, z0.s, z1.s
lsr z0.s, z0.s, #1
st1h {z0.s}, p0, [x0, x4, lsl #1]
incw x4
2: whilelt p0.s, x4, x3
b.first 1b
ret
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