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implemented several simple floating point routines

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FeralChild64 committed 2020-02-02 11:04:39 +01:00
1 parent 4673f825af
commit c62f53058e
17 files changed
+227 -28
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c64/basic/,stubs_math/bbd4.MOVMF2.s
-24
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// #LAYOUT# STD * #TAKE
// #LAYOUT# * BASIC_0 #TAKE
// #LAYOUT# * * #IGNORE
//
// Math package - copy FAC1 to memory location, rounds if asked
//
// Input:
// - .X - address low byte
// - .Y - address high byte
// - $70 - if MSB is set performs rouding
//
// Output:
// - .A - FAC1 exponent
//
// See also:
// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
// - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
//
// XXX provide implementation
MOVFM2:
STUB_IMPLEMENTATION()
c64/basic/,stubs_math/bbd4.interop
-3
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This is an important floating point math routine, documented in many places.
XXX - try to find real-life example
c64/basic/,stubs_math/bbfc.MOVEF.s
-17
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// #LAYOUT# STD * #TAKE
// #LAYOUT# * BASIC_0 #TAKE
// #LAYOUT# * * #IGNORE
//
// Math package - copy FAC2 to FAC1
//
// See also:
// - [CM64] Computes Mapping the Commodore 64 - page 115
// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
// - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
//
// XXX provide implementation
MOVEF:
STUB_IMPLEMENTATION()
c64/basic/,stubs_math/bbfc.interop
-3
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@@ -1,3 +0,0 @@
This is an important floating point math routine, documented in many places.
XXX - try to find real-life example