36 lines
364 B
ArmAsm
36 lines
364 B
ArmAsm
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.global ___sdivhi3
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___sdivhi3:
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lda <r4
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ldx <r5
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ldy #0 !flag positive result
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rol a
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ror a
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bpl L10
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iny !flag negative result
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eor #0xFFFF
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inc a
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L10: pha
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txa
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bpl L20
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dey !flag negative/positive result
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eor #0xFFFF
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inc a
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tax
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L20: pla
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phy
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jsr >udv
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ply
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beq Lend !if positive result
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eor #0xFFFF !negate result
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inc a
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Lend: sta <r0
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rtl
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