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implemented NEGOP math routine

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FeralChild64 committed 2020-01-29 20:28:01 +01:00
1 parent 733bf8d2ba
commit 0e319d9871
4 files changed
+11 -5
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c64/basic/,stubs_math/bfb4.NEGOP.s → c64/basic/math/bfb4.NEGOP.s
+9 -3
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@@ -10,7 +10,13 @@
// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
//
// XXX provide implementation
NEGOP:
STUB_IMPLEMENTATION()
lda FAC1_exponent
beq !+ // do not toggle the sign if value is 0
lda FAC1_sign
eor #$FF
sta FAC1_sign
!:
rts
c64/basic/,stubs_math/bfb4.interop → c64/basic/math/bfb4.interop
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