//===- mlir_test_cblas_interface.cpp - Simple Blas subset interface -------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Simple Blas subset interface implementation.
//
//===----------------------------------------------------------------------===//

#include "include/mlir_test_cblas_interface.h"
#include "include/mlir_test_cblas.h"
#include <assert.h>
#include <iostream>

extern "C" void
_mlir_ciface_linalg_fill_viewf32_f32(StridedMemRefType<float, 0> *X, float f) {
  X->data[X->offset] = f;
}

extern "C" void
_mlir_ciface_linalg_fill_viewsxf32_f32(StridedMemRefType<float, 1> *X,
                                       float f) {
  for (unsigned i = 0; i < X->sizes[0]; ++i)
    *(X->data + X->offset + i * X->strides[0]) = f;
}

extern "C" void
_mlir_ciface_linalg_fill_viewsxsxf32_f32(StridedMemRefType<float, 2> *X,
                                         float f) {
  for (unsigned i = 0; i < X->sizes[0]; ++i)
    for (unsigned j = 0; j < X->sizes[1]; ++j)
      *(X->data + X->offset + i * X->strides[0] + j * X->strides[1]) = f;
}

extern "C" void
_mlir_ciface_linalg_copy_viewf32_viewf32(StridedMemRefType<float, 0> *I,
                                         StridedMemRefType<float, 0> *O) {
  O->data[O->offset] = I->data[I->offset];
}

extern "C" void
_mlir_ciface_linalg_copy_viewsxf32_viewsxf32(StridedMemRefType<float, 1> *I,
                                             StridedMemRefType<float, 1> *O) {
  if (I->sizes[0] != O->sizes[0]) {
    std::cerr << "Incompatible strided memrefs\n";
    printMemRefMetaData(std::cerr, *I);
    printMemRefMetaData(std::cerr, *O);
    return;
  }
  for (unsigned i = 0; i < I->sizes[0]; ++i)
    O->data[O->offset + i * O->strides[0]] =
        I->data[I->offset + i * I->strides[0]];
}

extern "C" void _mlir_ciface_linalg_copy_viewsxsxf32_viewsxsxf32(
    StridedMemRefType<float, 2> *I, StridedMemRefType<float, 2> *O) {
  if (I->sizes[0] != O->sizes[0] || I->sizes[1] != O->sizes[1]) {
    std::cerr << "Incompatible strided memrefs\n";
    printMemRefMetaData(std::cerr, *I);
    printMemRefMetaData(std::cerr, *O);
    return;
  }
  auto so0 = O->strides[0], so1 = O->strides[1];
  auto si0 = I->strides[0], si1 = I->strides[1];
  for (unsigned i = 0; i < I->sizes[0]; ++i)
    for (unsigned j = 0; j < I->sizes[1]; ++j)
      O->data[O->offset + i * so0 + j * so1] =
          I->data[I->offset + i * si0 + j * si1];
}

extern "C" void _mlir_ciface_linalg_dot_viewsxf32_viewsxf32_viewf32(
    StridedMemRefType<float, 1> *X, StridedMemRefType<float, 1> *Y,
    StridedMemRefType<float, 0> *Z) {
  if (X->strides[0] != 1 || Y->strides[0] != 1 || X->sizes[0] != Y->sizes[0]) {
    std::cerr << "Incompatible strided memrefs\n";
    printMemRefMetaData(std::cerr, *X);
    printMemRefMetaData(std::cerr, *Y);
    printMemRefMetaData(std::cerr, *Z);
    return;
  }
  Z->data[Z->offset] +=
      mlir_test_cblas_sdot(X->sizes[0], X->data + X->offset, X->strides[0],
                           Y->data + Y->offset, Y->strides[0]);
}

extern "C" void _mlir_ciface_linalg_matmul_viewsxsxf32_viewsxsxf32_viewsxsxf32(
    StridedMemRefType<float, 2> *A, StridedMemRefType<float, 2> *B,
    StridedMemRefType<float, 2> *C) {
  if (A->strides[1] != B->strides[1] || A->strides[1] != C->strides[1] ||
      A->strides[1] != 1 || A->sizes[0] < A->strides[1] ||
      B->sizes[0] < B->strides[1] || C->sizes[0] < C->strides[1] ||
      C->sizes[0] != A->sizes[0] || C->sizes[1] != B->sizes[1] ||
      A->sizes[1] != B->sizes[0]) {
    printMemRefMetaData(std::cerr, *A);
    printMemRefMetaData(std::cerr, *B);
    printMemRefMetaData(std::cerr, *C);
    return;
  }
  mlir_test_cblas_sgemm(
      CBLAS_ORDER::CblasRowMajor, CBLAS_TRANSPOSE::CblasNoTrans,
      CBLAS_TRANSPOSE::CblasNoTrans, C->sizes[0], C->sizes[1], A->sizes[1],
      1.0f, A->data + A->offset, A->strides[0], B->data + B->offset,
      B->strides[0], 1.0f, C->data + C->offset, C->strides[0]);
}