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Minor math optimizations

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This commit is contained in:
IrgendwerA8
2019-02-28 17:30:34 +01:00
committed by Oliver Schmidt
parent 0ea78be056
commit cc6559c3f6
4 changed files with 16 additions and 10 deletions
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8
libsrc/runtime/ludiv.s
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@@ -78,7 +78,7 @@ L0: asl ptr1
; Do a subtraction. we do not have enough space to store the intermediate
; result, so we may have to do the subtraction twice.
pha
tax
cmp ptr3
lda ptr2+1
sbc ptr3+1
@@ -91,9 +91,9 @@ L0: asl ptr1
; Overflow, do the subtraction again, this time store the result
sta tmp4 ; We have the high byte already
pla
txa
sbc ptr3 ; byte 0
pha
tax
lda ptr2+1
sbc ptr3+1
sta ptr2+1 ; byte 1
@@ -102,7 +102,7 @@ L0: asl ptr1
sta tmp3 ; byte 2
inc ptr1 ; Set result bit
L1: pla
L1: txa
dey
bne L0
sta ptr2