+ @ Shift BGR color 1 bit to the left, discarding MSB and preparing for vbit.
+ @ MSB is used for transparency (not needed here, and can mess with green).
+ @ example: q0 = 1111 1100 1010 0110
+ vshl.u16 q0, q0, #1
+ vshl.u16 q1, q1, #1
+ vshl.u16 q2, q2, #1
+ vshl.u16 q3, q3, #1
+ @ Places red value in left most bits, clears bits to the right.
+ @ example: q8 = 1001 1000 0000 0000
+ vshl.u16 q8, q0, #10
+ vshl.u16 q9, q1, #10
+ vshl.u16 q10, q2, #10
+ vshl.u16 q11, q3, #10
+ @ Places blue value in right most bits, leaving bits to the left unchanged.
+ @ example: q8 = 1001 1000 0001 1111
+ vsri.u16 q8, q0, #11
+ vsri.u16 q9, q1, #11
+ vsri.u16 q10, q2, #11
+ vsri.u16 q11, q3, #11
+ @ Sets green value from shifted BGR color by apply a mask.
+ @ example: q15 = 0000 0111 1100 0000
+ @ q8 = 1001 1100 1001 1111
+ vbit q8, q0, q15
+ vbit q9, q1, q15
+ vbit q10, q2, q15
+ vbit q11, q3, q15
+ vstmia r0!, {q8-q11}