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dot_kernel_sve.c
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/***************************************************************************
Copyright (c) 2023, The OpenBLAS Project
Copyright (c) 2022, Arm Ltd
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.
*****************************************************************************/
#include "common.h"
#include <arm_sve.h>
#ifdef DOUBLE
#define DTYPE "d"
#define WIDTH "d"
#define SHIFT "3"
#else
#define DTYPE "s"
#define WIDTH "w"
#define SHIFT "2"
#endif
#define COUNT \
" cnt"WIDTH" x9 \n"
#define SETUP_TRUE \
" ptrue p0."DTYPE" \n"
#define OFFSET_INPUTS \
" add x12, %[X_], x9, lsl #"SHIFT" \n" \
" add x13, %[Y_], x9, lsl #"SHIFT" \n"
#define TAIL_WHILE \
" whilelo p1."DTYPE", x8, x0 \n"
#define UPDATE(pg, x,y,out) \
" ld1"WIDTH" { z2."DTYPE" }, "pg"/z, ["x", x8, lsl #"SHIFT"] \n" \
" ld1"WIDTH" { z3."DTYPE" }, "pg"/z, ["y", x8, lsl #"SHIFT"] \n" \
" fmla "out"."DTYPE", "pg"/m, z2."DTYPE", z3."DTYPE" \n"
#define SUM_VECTOR(v) \
" faddv "DTYPE""v", p0, z"v"."DTYPE" \n"
#define RET \
" fadd %"DTYPE"[RET_], "DTYPE"1, "DTYPE"0 \n"
#define DOT_KERNEL \
COUNT \
" mov z1.d, #0 \n" \
" mov z0.d, #0 \n" \
" mov x8, #0 \n" \
" movi d1, #0x0 \n" \
SETUP_TRUE \
" neg x10, x9, lsl #1 \n" \
" ands x11, x10, x0 \n" \
" b.eq 2f // skip_2x \n" \
OFFSET_INPUTS \
"1: // vector_2x \n" \
UPDATE("p0", "%[X_]", "%[Y_]", "z1") \
UPDATE("p0", "x12", "x13", "z0") \
" sub x8, x8, x10 \n" \
" cmp x8, x11 \n" \
" b.lo 1b // vector_2x \n" \
SUM_VECTOR("1") \
"2: // skip_2x \n" \
" neg x10, x9 \n" \
" and x10, x10, x0 \n" \
" cmp x8, x10 \n" \
" b.hs 4f // tail \n" \
"3: // vector_1x \n" \
UPDATE("p0", "%[X_]", "%[Y_]", "z0") \
" add x8, x8, x9 \n" \
" cmp x8, x10 \n" \
" b.lo 3b // vector_1x \n" \
"4: // tail \n" \
" cmp x10, x0 \n" \
" b.eq 5f // end \n" \
TAIL_WHILE \
UPDATE("p1", "%[X_]", "%[Y_]", "z0") \
"5: // end \n" \
SUM_VECTOR("0") \
RET
static
FLOAT
dot_kernel_sve(BLASLONG n, FLOAT* x, FLOAT* y)
{
FLOAT ret;
asm(DOT_KERNEL
:
[RET_] "=&w" (ret)
:
[N_] "r" (n),
[X_] "r" (x),
[Y_] "r" (y)
: "cc",
"memory",
"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
"x8", "x9", "x10", "x11", "x12", "x13", "d1",
"z0", "z1"
);
return ret;
}