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Fixed the result of the % operator for ints

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1408 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2002-09-28 19:41:00 +00:00
parent 293bb88188
commit 3aab67401e
3 changed files with 44 additions and 32 deletions
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25
libsrc/runtime/div.s
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@@ -8,15 +8,30 @@
; values if $8000, in which case the negate will fail.
.export tosdiva0, tosdivax
.import popsargs, udiv16, adjsres
.importzp sreg
.import popsargs, udiv16, negax
.importzp sreg, tmp1, tmp2
tosdiva0:
ldx #0
tosdivax:
jsr popsargs ; Get arguments from stack, adjust sign
jsr udiv16 ; Do the division
lda sreg ; Result is in sreg, remainder in ptr1
ldx sreg+1
jmp adjsres ; Adjust the sign of the result if needed
ldx sreg+1 ; Load high byte of result
; Adjust the sign of the result. tmp1 contains the high byte of the left
; operand, tmp2 contains the high byte of the right operand.
lda tmp1
eor tmp2
bpl Pos ; Jump if sign of result positive
; Result is negative
lda sreg ; Load low byte of result
jmp negax ; Adjust the sign
; Result is positive
Pos: lda sreg
rts