Load 8bit uint8_t as uint32_t?

Question

my image processing project works with grayscale images. I have ARM Cortex-A8 processor platform. I want to make use of the NEON.

I have a grayscale image( consider

Answer 1

There is not instruction that can load your 4 8bit value into 4 32bit register.

you must load them and then use a vshl twice. because neon can't use 32 registers you'll have to work on 8 pixels (and not 4)

You can use only 16bits register. it should be enough...