26 lines
731 B
ArmAsm
26 lines
731 B
ArmAsm
// #LAYOUT# STD * #TAKE
|
|
// #LAYOUT# X16 BASIC_0 #TAKE-OFFSET 2000
|
|
// #LAYOUT# * BASIC_0 #TAKE
|
|
// #LAYOUT# * * #IGNORE
|
|
|
|
//
|
|
// Math package - set FAC1 as FAC2 raised to the power of FAC1
|
|
//
|
|
// Input:
|
|
// - .A - must load FAC1 exponent ($61) beforehand to set the zero flag
|
|
//
|
|
// Note:
|
|
// - load FAC2 after FAC1, or mimic the Kernals sign comparison (XXX do we need it?)
|
|
// - uses exp(x*log(y)) formula to calculate y^x; slow and inaccurate
|
|
//
|
|
// See also:
|
|
// - [CM64] Computes Mapping the Commodore 64 - page 117
|
|
// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
|
|
// - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
|
|
//
|
|
|
|
// XXX provide implementation
|
|
|
|
FPWRT:
|
|
STUB_IMPLEMENTATION()
|