use constexpr for defining is_row_major

Author: Vahid Tavanashad

dpnp/backend/extensions/blas/gemm.cpp

@@ -96,7 +96,7 @@ static sycl::event gemm_impl(sycl::queue &exec_q,
                 const Tab *a, const std::int64_t lda, const Tab *b,
                 const std::int64_t ldb, Tab beta, Tc *c, const std::int64_t ldc,
                 const std::vector<sycl::event> &deps) -> sycl::event {
-            if (is_row_major) {
+            if constexpr (is_row_major) {
                 return mkl_blas::row_major::gemm(q, transA, transB, m, n, k,
                                                  alpha, a, lda, b, ldb, beta, c,
                                                  ldc, deps);
@@ -232,7 +232,7 @@ std::tuple<sycl::event, sycl::event, bool>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
 
     transA = is_matrixA_c_contig ? oneapi::mkl::transpose::T
                                  : oneapi::mkl::transpose::N;

dpnp/backend/extensions/blas/gemm_batch.cpp

@@ -108,7 +108,7 @@ static sycl::event gemm_batch_impl(sycl::queue &exec_q,
                 Tc *c, const std::int64_t ldc, const std::int64_t stridec,
                 const std::int64_t batch_size,
                 const std::vector<sycl::event> &deps) -> sycl::event {
-            if (is_row_major) {
+            if constexpr (is_row_major) {
                 return mkl_blas::row_major::gemm_batch(
                     q, transA, transB, m, n, k, alpha, a, lda, stridea, b, ldb,
                     strideb, beta, c, ldc, stridec, batch_size, deps);
@@ -307,7 +307,7 @@ std::tuple<sycl::event, sycl::event, bool>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
 
     transA = A_base_is_c_contig ? oneapi::mkl::transpose::T
                                 : oneapi::mkl::transpose::N;

dpnp/backend/extensions/blas/gemv.cpp

@@ -89,7 +89,7 @@ static sycl::event gemv_impl(sycl::queue &exec_q,
                 const std::int64_t lda, const T *x, const std::int64_t incx,
                 T beta, T *y, const std::int64_t incy,
                 const std::vector<sycl::event> &deps) -> sycl::event {
-            if (is_row_major) {
+            if constexpr (is_row_major) {
                 return mkl_blas::row_major::gemv(q, transA, m, n, alpha, a, lda,
                                                  x, incx, beta, y, incy, deps);
             }
@@ -187,7 +187,7 @@ std::pair<sycl::event, sycl::event>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
     std::int64_t m;
     std::int64_t n;