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https://github.com/OpenMathLib/OpenBLAS
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740efd71c4
This also improves the testing and generic kernel by re-using the BF16 conversion functions. Built on top of https://github.com/OpenMathLib/OpenBLAS/pull/5357 and derived from https://github.com/OpenMathLib/OpenBLAS/pull/5287 Co-authored-by: Ye Tao <ye.tao@arm.com>
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/***************************************************************************
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* Copyright (c) 2025, The OpenBLAS Project
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of the OpenBLAS project nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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* *****************************************************************************/
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#include "common.h"
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#include <arm_neon.h>
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int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT beta_in, IFLOAT *dummy2,
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BLASLONG dummy3, IFLOAT *dummy4, BLASLONG dummy5, FLOAT *c,
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BLASLONG ldc) {
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BLASLONG i, j;
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BLASLONG chunk, remain;
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bfloat16_t *ptr_c, *ptr_c0;
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bfloat16x8_t x0, z0;
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float32x4_t y0, y1;
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float x;
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bfloat16_t z;
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bfloat16_t zero_bf16 = vcvth_bf16_f32(0.0f);
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bfloat16x8_t zeros = vdupq_n_bf16(zero_bf16);
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bfloat16_t beta_bf16;
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memcpy(&beta_bf16, &beta_in, sizeof(bfloat16_t));
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float beta = vcvtah_f32_bf16(beta_bf16);
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float32x4_t beta_neon = vdupq_n_f32(beta);
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ptr_c = (bfloat16_t *)c;
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chunk = m >> 3;
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remain = m & 7;
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if (beta == 0.0f){
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for (j = 0; j < n; j ++){
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ptr_c0 = ptr_c;
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ptr_c += ldc;
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for (i = 0; i < chunk; i ++){
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vst1q_bf16(ptr_c0, zeros);
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ptr_c0 += 8;
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}
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for (i = 0; i < remain; i ++){
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ptr_c0[0] = zero_bf16;
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ptr_c0 ++;
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}
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}
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} else {
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for (j = 0; j < n; j ++){
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ptr_c0 = ptr_c;
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ptr_c += ldc;
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for (i = 0; i < chunk; i ++){
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x0 = vld1q_bf16(ptr_c0);
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y0 = vcvtq_low_f32_bf16(x0);
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y1 = vcvtq_high_f32_bf16(x0);
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y0 = vmulq_f32(y0, beta_neon);
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y1 = vmulq_f32(y1, beta_neon);
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z0 = vcvtq_low_bf16_f32(y0);
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z0 = vcvtq_high_bf16_f32(z0, y1);
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vst1q_bf16(ptr_c0, z0);
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ptr_c0 += 8;
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}
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for (i = 0; i < remain; i ++){
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x = vcvtah_f32_bf16(ptr_c0[0]);
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z = vcvth_bf16_f32(x * beta);
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ptr_c0[0] = z;
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ptr_c0 ++;
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}
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}
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}
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return 0;
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};
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