83Plus:BCALLs:40C0
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Revision as of 05:53, 3 August 2005 by 66.66.23.91 (Talk)
Synopsis
Official Name: cos
BCALL Address: 40C0
Computes the cosine of OP1 and returns the result in OP1.
Inputs
- OP1 = floating point
Outputs
- OP1 = cosine of OP1
- Approx. TStates: 150,000 to 200,000
Destroys
- AF, BC, DE, HL
- OP1-OP5
Comments
The cycle count for this routine is very high because the algorithm uses an infinite series to approximate the cosine. Where speed is critical, a trig table should be used.
Example
B_CALL OP1Set3 ;OP1=floating point 3 B_CALL cos ;returns with OP1=-0.9899924...
