Vodafone SS 08 - Manual (Page 38)

TU Dresden, 4/29/2008 Slide 38
chair
Numerical Issues - Useful Tips
ƒ Multiply by 2: Use shift left
ƒ Divide by 2: Use shift right
ƒ Log
2
N: Use shift
ƒ Sine, Cosine, Log: Use look up tables
ƒ To convert a fractional number to hex:
‰
Num x 2 15
‰
Then convert to hex
e.g: convert 0.5 to hex
‰
0.5 x 2 15 = 16384
‰
(16384)
dec
= (0x4000)
hex