// #LAYOUT# STD * #TAKE // #LAYOUT# * BASIC_0 #TAKE // #LAYOUT# * * #IGNORE // // Math package - subtract FAC1 from FAC2 // // 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?) // // See also: // - [CM64] Computes Mapping the Commodore 64 - page 112 // - https://www.c64-wiki.com/wiki/Floating_point_arithmetic // - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics // // XXX provide implementation FSUBT: STUB_IMPLEMENTATION()