Difference between revisions of "83Plus:BCALLs:405D"
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=== Destroys === | === Destroys === | ||
| − | * [[83Plus:RAM:8478|OP1]], [[83Plus:RAM: | + | * [[83Plus:RAM:8478|OP1]], [[83Plus:RAM:8483|OP2]] |
== Comments == | == Comments == | ||
Revision as of 16:35, 5 November 2006
Synopsis
Unofficial Name: Floor
BCALL Address: 405D
Calculates the floor of the value in OP1, and stores it in OP1. Floor is rounding down to the nearest integer, e.g. floor(3.5) = 3 and floor(-4.0001) = -4.
Inputs
- OP1: Number to take floor of
Outputs
- OP1 contains floor
Destroys
Comments
This BCALL calculates the floor of the value in OP1 by taking the fractional part, reversing its sign, and adding it to the original value.
Example
ld a,3 B_CALL SetXXOP1 B_CALL TimesPt5 ;OP1 is 1.5 B_CALL Floor ;OP1 is now 1
