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/*
BLIS
An object-based framework for developing high-performance BLAS-like
libraries.
Copyright (C) 2014, The University of Texas at Austin
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- 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.
- Neither the name(s) of the copyright holder(s) 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 COPYRIGHT
HOLDER 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 "blis.h"
#if PPAPI_RELEASE >= 36
typedef float v4sf __attribute__ ((vector_size(16)));
inline v4sf v4sf_splat(float x) {
return (v4sf) { x, x, x, x };
}
inline v4sf v4sf_load(const float* a) {
return *((const v4sf*)a);
}
inline v4sf v4sf_cload(const scomplex* a) {
return *((const v4sf*)a);
}
inline void v4sf_store(float* a, v4sf x) {
*((v4sf*)a) = x;
}
inline void v4sf_cstore(scomplex* a, v4sf x) {
*((v4sf*)a) = x;
}
inline v4sf v4sf_zero() {
return (v4sf) { 0.0f, 0.0f, 0.0f, 0.0f };
}
#endif
void bli_saxpyv_opt(
conj_t conjx,
dim_t n,
float alpha[restrict static 1],
float x[restrict static n],
inc_t incx,
float y[restrict static n],
inc_t incy)
{
if (bli_zero_dim1(n)) {
return;
}
if (bli_seq0(*alpha)) {
return;
}
#if PPAPI_RELEASE >= 36
if (!bli_has_nonunit_inc2(incx, incy)) {
const v4sf alphav = v4sf_splat(*alpha);
while (n >= 4) {
const v4sf xv = v4sf_load(x);
v4sf yv = v4sf_load(y);
yv += xv * alphav;
v4sf_store(y, yv);
x += 4;
y += 4;
n -= 4;
}
const float alphac = *alpha;
while (n--) {
(*y++) += (*x++) * alphac;
}
}
#endif
/* Just call the reference implementation. */
BLIS_SAXPYV_KERNEL_REF(
conjx,
n,
alpha,
x,
incx,
y,
incy);
}
void bli_caxpyv_opt(
conj_t conjx,
dim_t n,
scomplex alpha[restrict static 1],
scomplex x[restrict static n],
inc_t incx,
scomplex y[restrict static n],
inc_t incy)
{
if (bli_zero_dim1(n)) {
return;
}
if (bli_ceq0(*alpha)) {
return;
}
#if PPAPI_RELEASE >= 36
if (!bli_has_nonunit_inc2(incx, incy)) {
if (bli_is_noconj(conjx)) {
const v4sf alphav0 = v4sf_splat(alpha->real);
const v4sf alphav1 = (v4sf) { -alpha->imag, alpha->imag, -alpha->imag, alpha->imag };
while (n >= 2) {
const v4sf xv0 = v4sf_cload(x);
v4sf yv = v4sf_cload(y);
const v4sf xv1 = __builtin_shufflevector(xv0, xv0, 1, 0, 3, 2);
yv += xv0 * alphav0 + xv1 * alphav1;
v4sf_cstore(y, yv);
x += 2;
y += 2;
n -= 2;
}
const float alphar = alpha->real;
const float alphai = alpha->imag;
while (n--) {
const float xr = x->real;
const float xi = x->imag;
const float yr = y->real;
const float yi = y->imag;
y->real = yr + xr * alphar - xi * alphai;
y->imag = yi + xr * alphai + xi * alphar;
x += 1;
y += 1;
}
} else {
const v4sf alphav0 = (v4sf) { alpha->real, -alpha->real, alpha->real, -alpha->real };
const v4sf alphav1 = v4sf_splat(alpha->imag);
while (n >= 2) {
const v4sf xv0 = v4sf_cload(x);
v4sf yv = v4sf_cload(y);
const v4sf xv1 = __builtin_shufflevector(xv0, xv0, 1, 0, 3, 2);
yv += xv0 * alphav0 + xv1 * alphav1;
v4sf_cstore(y, yv);
x += 2;
y += 2;
n -= 2;
}
const float alphar = alpha->real;
const float alphai = alpha->imag;
while (n--) {
const float xr = x->real;
const float xi = x->imag;
const float yr = y->real;
const float yi = y->imag;
y->real = yr + xr * alphar + xi * alphai;
y->imag = yi + xr * alphai - xi * alphar;
x += 1;
y += 1;
}
}
}
#endif
/* Just call the reference implementation. */
BLIS_CAXPYV_KERNEL_REF(
conjx,
n,
alpha,
x,
incx,
y,
incy);
}
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