Add matrix math kernels

include/kernels/matrix_math.cuh

@@ -0,0 +1,19 @@
+#ifndef MATRIX_MATH_H
+#define MATRIX_MATH_H
+
+__global__ void mat_vec_mul_kernel(
+    const float* d_matrix,
+    const float* d_vector,
+    float*       d_output,
+    int          w,
+    int          h
+);
+
+__global__ void vec_vec_add_kernel(
+    const float* d_vector1,
+    const float* d_vector2,
+    float*       d_output,
+    int          w
+);
+
+#endif  // MATRIX_MATH_H