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/*******************************************************************************
Copyright (c) 2019, The OpenBLAS Project
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. Neither the name of the OpenBLAS project nor the names of
its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/
#define ASSEMBLER
#include "common.h"
#define N x0 /* vector length */
#define X x1 /* X vector address */
#define INC_X x2 /* X stride */
#define I x5 /* loop variable */
/*******************************************************************************
* Macro definitions
*******************************************************************************/
#if !defined(DOUBLE)
#define REG0 wzr
#define SUMF s0
#define TMPF s1
#define TMPVF {v1.s}[0]
#define SZ 4
#else
#define REG0 xzr
#define SUMF d0
#define TMPF d1
#define TMPVF {v1.d}[0]
#define SZ 8
#endif
/******************************************************************************/
.macro KERNEL_F1
ldr TMPF, [X], #SZ
fadd SUMF, SUMF, TMPF
.endm
.macro KERNEL_F8
#if !defined(DOUBLE)
ld1 {v1.4s, v2.4s}, [X], #32 // Load [X3, X2, X1, X0]
fadd v1.4s, v1.4s, v2.4s // [X3+X1, X2+X0]
fadd v0.4s, v0.4s, v1.4s // [X3+X1, X2+X0]
PRFM PLDL1KEEP, [X, #1024]
#else // DOUBLE
ld1 {v2.2d, v3.2d, v4.2d, v5.2d}, [X]
add X, X, #64
PRFM PLDL1KEEP, [X, #1024]
fadd v2.2d, v2.2d, v3.2d
fadd v4.2d, v4.2d, v5.2d
fadd v0.2d, v0.2d, v2.2d
fadd v0.2d, v0.2d, v4.2d
#endif
.endm
.macro KERNEL_F8_FINALIZE
#if !defined(DOUBLE)
ext v1.16b, v0.16b, v0.16b, #8
fadd v0.2s, v0.2s, v1.2s
faddp SUMF, v0.2s
#else
faddp SUMF, v0.2d
#endif
.endm
.macro INIT_S
#if !defined(DOUBLE)
lsl INC_X, INC_X, #2
#else
lsl INC_X, INC_X, #3
#endif
.endm
.macro KERNEL_S1
ld1 TMPVF, [X], INC_X
fadd SUMF, SUMF, TMPF
.endm
/*******************************************************************************
* End of macro definitions
*******************************************************************************/
PROLOGUE
fmov SUMF, REG0
#if !defined(DOUBLE)
fmov s1, SUMF
#else
fmov d1, SUMF
#endif
cmp N, xzr
ble .Lsum_kernel_L999
cmp INC_X, xzr
ble .Lsum_kernel_L999
cmp INC_X, #1
bne .Lsum_kernel_S_BEGIN
.Lsum_kernel_F_BEGIN:
asr I, N, #3
cmp I, xzr
beq .Lsum_kernel_F1
.Lsum_kernel_F8:
KERNEL_F8
subs I, I, #1
bne .Lsum_kernel_F8
KERNEL_F8_FINALIZE
.Lsum_kernel_F1:
ands I, N, #7
ble .Lsum_kernel_L999
.Lsum_kernel_F10:
KERNEL_F1
subs I, I, #1
bne .Lsum_kernel_F10
.Lsum_kernel_L999:
ret
.Lsum_kernel_S_BEGIN:
INIT_S
asr I, N, #2
cmp I, xzr
ble .Lsum_kernel_S1
.Lsum_kernel_S4:
KERNEL_S1
KERNEL_S1
KERNEL_S1
KERNEL_S1
subs I, I, #1
bne .Lsum_kernel_S4
.Lsum_kernel_S1:
ands I, N, #3
ble .Lsum_kernel_L999
.Lsum_kernel_S10:
KERNEL_S1
subs I, I, #1
bne .Lsum_kernel_S10
ret
EPILOGUE
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