Vector MAC with pre-subtraction

Overview

Vector MAC operations allowing pre-subtraction from within the X buffer, or between the X and Y buffers. The result is then multiplied with data from the Z buffer.

For general information on all vector MAC intrinsics go here.

Modules
	16 bit x 16 bit
	16 bit x 32 bit
	32 bit x 16 bit
	32 bit x 32 bit