308571074c
This is an artifact from merging MLIR into LLVM, the file headers are now aligned with the rest of the project.
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
//===- cblas.cpp - Simple Blas subset implementation ----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Simple Blas subset implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "include/cblas.h"
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#include <assert.h>
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extern "C" float cblas_sdot(const int N, const float *X, const int incX,
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const float *Y, const int incY) {
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float res = 0.0f;
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for (int i = 0; i < N; ++i)
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res += X[i * incX] * Y[i * incY];
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return res;
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}
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extern "C" void cblas_sgemm(const enum CBLAS_ORDER Order,
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const enum CBLAS_TRANSPOSE TransA,
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const enum CBLAS_TRANSPOSE TransB, const int M,
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const int N, const int K, const float alpha,
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const float *A, const int lda, const float *B,
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const int ldb, const float beta, float *C,
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const int ldc) {
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assert(Order == CBLAS_ORDER::CblasRowMajor);
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assert(TransA == CBLAS_TRANSPOSE::CblasNoTrans);
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assert(TransB == CBLAS_TRANSPOSE::CblasNoTrans);
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for (int m = 0; m < M; ++m) {
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auto *pA = A + m * lda;
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auto *pC = C + m * ldc;
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for (int n = 0; n < N; ++n) {
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float c = pC[n];
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float res = 0.0f;
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for (int k = 0; k < K; ++k) {
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auto *pB = B + k * ldb;
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res += pA[k] * pB[n];
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}
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pC[n] = alpha * c + beta * res;
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}
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}
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}
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