deaeb6c5b8
1. Added bfloat16 based dot as new API: shdot
2. Implemented generic kernel and cooperlake-specific (AVX512-BF16) kernel for shdot
3. Added 4 conversion APIs for bfloat16 data type <=> single/double: shstobf16 shdtobf16 sbf16tos dbf16tod
shstobf16 -- convert single float array to bfloat16 array
shdtobf16 -- convert double float array to bfloat16 array
sbf16tos -- convert bfloat16 array to single float array
dbf16tod -- convert bfloat16 array to double float array
4. Implemented generic kernels for all 4 conversion APIs, and cooperlake-specific kernel for shstobf16 and shdtobf16
5. Update level1 thread facilitate functions and macros to support multi-threading for these new APIs
6. Fix Cooperlake platform detection/specify issue when under dynamic-arch building
7. Change the typedef of bfloat16 from unsigned short to more strict uint16_t
Signed-off-by: Chen, Guobing <guobing.chen@intel.com>
116 lines
4.0 KiB
C
116 lines
4.0 KiB
C
/***************************************************************************
|
|
Copyright (c) 2014, 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.
|
|
*****************************************************************************/
|
|
|
|
#include "common.h"
|
|
|
|
#if defined(COOPERLAKE)
|
|
#include "shdot_microk_cooperlake.c"
|
|
#endif
|
|
|
|
static float shdot_compute(BLASLONG n, bfloat16 *x, BLASLONG inc_x, bfloat16 *y, BLASLONG inc_y)
|
|
{
|
|
float d = 0.0;
|
|
|
|
#ifdef HAVE_SHDOT_ACCL_KERNEL
|
|
if ((inc_x == 1) && (inc_y == 1)) {
|
|
return shdot_accl_kernel(n, x, y);
|
|
}
|
|
#endif
|
|
|
|
float * x_fp32 = malloc(sizeof(float)*n);
|
|
float * y_fp32 = malloc(sizeof(float)*n);
|
|
|
|
SBF16TOS_K(n, x, inc_x, x_fp32, 1);
|
|
SBF16TOS_K(n, y, inc_y, y_fp32, 1);
|
|
|
|
d = SDOTU_K(n, x_fp32, 1, y_fp32, 1);
|
|
|
|
free(x_fp32);
|
|
free(y_fp32);
|
|
|
|
return d;
|
|
}
|
|
|
|
#if defined(SMP)
|
|
static int shdot_thread_func(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, bfloat16 dummy2,
|
|
bfloat16 *x, BLASLONG inc_x, bfloat16 *y, BLASLONG inc_y,
|
|
float *result, BLASLONG dummy3)
|
|
{
|
|
*(float *)result = shdot_compute(n, x, inc_x, y, inc_y);
|
|
return 0;
|
|
}
|
|
|
|
extern int blas_level1_thread_with_return_value(int mode, BLASLONG m, BLASLONG n, BLASLONG k, void *alpha,
|
|
void *a, BLASLONG lda, void *b, BLASLONG ldb, void *c, BLASLONG ldc,
|
|
int (*function)(), int nthreads);
|
|
#endif
|
|
|
|
float CNAME(BLASLONG n, bfloat16 *x, BLASLONG inc_x, bfloat16 *y, BLASLONG inc_y)
|
|
{
|
|
float dot_result = 0.0;
|
|
|
|
if (n <= 0) return 0.0;
|
|
|
|
#if defined(SMP)
|
|
int nthreads;
|
|
int thread_thres = 40960;
|
|
bfloat16 dummy_alpha;
|
|
#endif
|
|
|
|
#if defined(SMP)
|
|
if (inc_x == 0 || inc_y == 0 || n <= thread_thres)
|
|
nthreads = 1;
|
|
else
|
|
nthreads = num_cpu_avail(1);
|
|
|
|
int best_threads = (int) (n/(float)thread_thres + 0.5);
|
|
|
|
if (best_threads < nthreads) {
|
|
nthreads = best_threads;
|
|
}
|
|
|
|
if (nthreads <= 1) {
|
|
dot_result = shdot_compute(n, x, inc_x, y, inc_y);
|
|
} else {
|
|
char thread_result[MAX_CPU_NUMBER * sizeof(double) * 2];
|
|
int mode = BLAS_BFLOAT16 | BLAS_REAL;
|
|
blas_level1_thread_with_return_value(mode, n, 0, 0, &dummy_alpha,
|
|
x, inc_x, y, inc_y, thread_result, 0,
|
|
(void *)shdot_thread_func, nthreads);
|
|
float * ptr = (float *)thread_result;
|
|
for (int i = 0; i < nthreads; i++) {
|
|
dot_result += (*ptr);
|
|
ptr = (float *)(((char *)ptr) + sizeof(double) * 2);
|
|
}
|
|
}
|
|
#else
|
|
dot_result = shdot_compute(n, x, inc_x, y, inc_y);
|
|
#endif
|
|
|
|
return dot_result;
|
|
}
|