Question

What is the stride (i.e., distance between elements that need to be put together in vector registers) of matrix B and D in the following code for row-major and column-major methods for storing multidimensional data?

a) Row-major: B = 1, D = 1; Column-major: B = 1, D = 1
b) Row-major: B = 1, D = 1; Column-major: B = 2, D = 2
c) Row-major: B = 1, D = 2; Column-major: B = 1, D = 2
d) Row-major: B = 2, D = 2; Column-major: B = 1, D = 1

Answer 1

The stride of matrix B is 1 for both row-major and column-major methods. For matrix D, the stride is 1 in row-major and 2 in column-major.

Step-by-step explanation:

In this code, the stride represents the distance between elements that need to be put together in vector registers. For matrix B, the stride is the same for both row-major and column-major methods, which is 1. This means that the elements in matrix B are contiguous in memory, with each element being one unit apart.

For matrix D, the stride depends on the storage method. In the row-major method, the stride is also 1, meaning that the elements are contiguous. In the column-major method, however, the stride is 2. This means that the elements in matrix D are separated by two units in memory.