OpenBLAS/kernel/arm/ddot_vfp.S

258 lines
5.4 KiB
ArmAsm

/***************************************************************************
Copyright (c) 2013, 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
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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
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*****************************************************************************/
/**************************************************************************************
* 2013/11/11 Saar
* BLASTEST : OK
* CTEST : OK
* TEST : OK
*
* 2016/01/23 Saar
* Bugfix for Refs #750 and #740
**************************************************************************************/
#define ASSEMBLER
#include "common.h"
#define STACKSIZE 256
#define N r0
#define X r1
#define INC_X r2
#define OLD_Y r3
/******************************************************
* [fp, #-128] - [fp, #-64] is reserved
* for store and restore of floating point
* registers
*******************************************************/
#define OLD_INC_Y [fp, #4 ]
#define I r5
#define Y r6
#define INC_Y r7
#define X_PRE 512
/**************************************************************************************
* Macro definitions
**************************************************************************************/
.macro KERNEL_F4
pld [ X, #X_PRE ]
vldmia.f64 X!, { d8 }
pld [ Y, #X_PRE ]
vldmia.f64 Y!, { d4 }
vldmia.f64 Y!, { d5 }
fmacd d0 , d4, d8
vldmia.f64 X!, { d9 }
vldmia.f64 Y!, { d6 }
fmacd d1 , d5, d9
vldmia.f64 X!, { d10 }
vldmia.f64 X!, { d11 }
fmacd d0 , d6, d10
vldmia.f64 Y!, { d7 }
fmacd d1 , d7, d11
.endm
.macro KERNEL_F1
vldmia.f64 X!, { d4 }
vldmia.f64 Y!, { d8 }
fmacd d0 , d4, d8
.endm
/*************************************************************************************************************************/
.macro KERNEL_S4
nop
vldmia.f64 X, { d4 }
vldmia.f64 Y, { d8 }
add X, X, INC_X
add Y, Y, INC_Y
fmacd d0 , d4, d8
vldmia.f64 X, { d5 }
vldmia.f64 Y, { d9 }
add X, X, INC_X
add Y, Y, INC_Y
fmacd d1 , d5, d9
vldmia.f64 X, { d6 }
vldmia.f64 Y, { d10 }
add X, X, INC_X
add Y, Y, INC_Y
fmacd d0 , d6, d10
vldmia.f64 X, { d7 }
vldmia.f64 Y, { d11 }
add X, X, INC_X
add Y, Y, INC_Y
fmacd d1 , d7, d11
.endm
.macro KERNEL_S1
vldmia.f64 X, { d4 }
vldmia.f64 Y, { d8 }
add X, X, INC_X
fmacd d0 , d4, d8
add Y, Y, INC_Y
.endm
/**************************************************************************************
* End of macro definitions
**************************************************************************************/
PROLOGUE
.align 5
push {r4 - r9, fp}
add fp, sp, #24
sub sp, sp, #STACKSIZE // reserve stack
sub r4, fp, #128
vstm r4, { d8 - d15} // store floating point registers
mov Y, OLD_Y
ldr INC_Y, OLD_INC_Y
movs r4, #0 // clear floating point register
vmov s0, r4
vmov s1, r4
vcvt.f64.f32 d0, s0
vcvt.f64.f32 d1, s1
cmp N, #0
ble ddot_kernel_L999
# cmp INC_X, #0
# beq ddot_kernel_L999
# cmp INC_Y, #0
# beq ddot_kernel_L999
cmp INC_X, #1
bne ddot_kernel_S_BEGIN
cmp INC_Y, #1
bne ddot_kernel_S_BEGIN
ddot_kernel_F_BEGIN:
asrs I, N, #2 // I = N / 4
ble ddot_kernel_F1
ddot_kernel_F4:
KERNEL_F4
subs I, I, #1
ble ddot_kernel_F1
KERNEL_F4
subs I, I, #1
bne ddot_kernel_F4
ddot_kernel_F1:
ands I, N, #3
ble ddot_kernel_L999
ddot_kernel_F10:
KERNEL_F1
subs I, I, #1
bne ddot_kernel_F10
b ddot_kernel_L999
ddot_kernel_S_BEGIN:
lsl INC_X, INC_X, #3 // INC_X * SIZE
lsl INC_Y, INC_Y, #3 // INC_Y * SIZE
asrs I, N, #2 // I = N / 4
ble ddot_kernel_S1
ddot_kernel_S4:
KERNEL_S4
subs I, I, #1
bne ddot_kernel_S4
ddot_kernel_S1:
ands I, N, #3
ble ddot_kernel_L999
ddot_kernel_S10:
KERNEL_S1
subs I, I, #1
bne ddot_kernel_S10
ddot_kernel_L999:
sub r3, fp, #128
vldm r3, { d8 - d15} // restore floating point registers
vadd.f64 d0 , d0, d1 // set return value
#if !defined(__ARM_PCS_VFP)
vmov r0, r1, d0
#endif
sub sp, fp, #24
pop {r4 - r9, fp}
bx lr
EPILOGUE