/*************************************************************************** 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 #include "common.h" #if defined(DOUBLE) #define FLOAT_TYPE double #elif defined(SINGLE) #define FLOAT_TYPE float #else #endif #if defined(COOPERLAKE) || defined(SAPPHIRERAPIDS) #if defined(DOUBLE) #include "dtobf16_microk_cooperlake.c" #elif defined(SINGLE) #include "stobf16_microk_cooperlake.c" #endif #endif /* Notes for algorithm: * - Round to Nearest Even used generally * - QNAN for NAN case * - Input denormals are treated as zero */ static void tobf16_generic_kernel(BLASLONG n, const FLOAT_TYPE * in, BLASLONG inc_in, bfloat16 * out, BLASLONG inc_out) { BLASLONG register index_in = 0; BLASLONG register index_out = 0; BLASLONG register index = 0; float float_in = 0.0; uint32_t * uint32_in = (uint32_t *)(&float_in); uint16_t * uint16_in = (uint16_t *)(&float_in); while(index> 16) & 0x1u) + 0x7fffu); #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ *(out+index_out) = uint16_in[1]; #else *(out+index_out) = uint16_in[0]; #endif break; } index_in += inc_in; index_out += inc_out; index++; } } #ifndef HAVE_TOBF16_ACCL_KERNEL static void tobf16_accl_kernel(BLASLONG n, const FLOAT_TYPE * in, bfloat16 * out) { tobf16_generic_kernel(n, in, 1, out, 1); } #endif static void tobf16_compute(BLASLONG n, FLOAT_TYPE * in, BLASLONG inc_in, bfloat16 * out, BLASLONG inc_out) { if ((inc_in == 1) && (inc_out == 1)) { tobf16_accl_kernel(n, in, out); } else { tobf16_generic_kernel(n, in, inc_in, out, inc_out); } } #if defined(SMP) static int tobf16_thread_func(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT_TYPE dummy2, FLOAT_TYPE *x, BLASLONG inc_x, bfloat16 *y, BLASLONG inc_y, FLOAT_TYPE *dummy3, BLASLONG dummy4) { tobf16_compute(n, x, inc_x, y, inc_y); return 0; } extern int blas_level1_thread(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 void CNAME(BLASLONG n, FLOAT_TYPE * in, BLASLONG inc_in, bfloat16 * out, BLASLONG inc_out) { if (n <= 0) return; #if defined(SMP) int nthreads; FLOAT_TYPE dummy_alpha; FLOAT_TYPE dummy_c; #endif #if defined(SMP) if (inc_in == 0 || inc_out == 0 || n <= 100000) { nthreads = 1; } else { if (n/100000 < 100) { nthreads = 4; } else { nthreads = 16; } } if (nthreads == 1) { tobf16_compute(n, in, inc_in, out, inc_out); } else { #if defined(DOUBLE) int mode = BLAS_REAL | BLAS_DTOBF16; #elif defined(SINGLE) int mode = BLAS_REAL | BLAS_STOBF16; #endif blas_level1_thread(mode, n, 0, 0, &dummy_alpha, in, inc_in, out, inc_out, &dummy_c, 0, (void *)tobf16_thread_func, nthreads); } #else tobf16_compute(n, in, inc_in, out, inc_out); #endif }