62 lines
644 B
ArmAsm
62 lines
644 B
ArmAsm
loop = 100
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dvi4:
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xor a
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ld (.flag1),a
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ld (.flag2),a
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ld ix,0
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add ix,sp
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ld b,(ix+7) ! dividend
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bit 7,b
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jr z,1f
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ld c,(ix+6)
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ld d,(ix+5)
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ld e,(ix+4)
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call .negbd
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ld (ix+7),d
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ld (ix+6),e
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ld (ix+5),h
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ld (ix+4),l
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ld a,1
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ld (.flag1),a
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1:
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ld b,(ix+3)
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bit 7,b
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jr z,2f
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call .negst
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ld a,1
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ld (.flag2),a
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2:
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call .dvu4
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ld a,(.flag1)
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jr z,3f
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call .negbd
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3:
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ld a,(.flag2)
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ld b,a
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ld a,(.flag1)
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xor b
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jr z,4f
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call .negst
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4:
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jr loop
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.negbd:
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xor a
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ld h,a
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ld l,a
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sbc hl,de
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ex de,hl
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ld h,a
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ld l,a
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sbc hl,bc
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ret
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.negst:
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pop iy
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pop de
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pop bc
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call .negbd
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push hl
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push de
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jp (iy)
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.data
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.flag1: .byte 0
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.flag2: .byte 0
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