## u32 Find MS Bit (u32 x)

This routine finds the most-significant bit in x.

- Set tmp to x
- Set msbit to 0
If tmp & 0xFFFF000 is not zero

- Right shift tmp by 16
- Set msbit to 16

If tmp & 0x0000FF00 is not zero

- Right shift tmp by 8
- Increment msbit by 4

If tmp & 0x0000000C is not zero

- Right shift tmp by 2
- Increment msbit by 2

If tmp & 0x00000002 is not zero

- Increment msbit by 1

- Return msbit