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- ;===============================================================
- HL_Div_BC:
- ;===============================================================
- ;Performs HL/BC
- ;Speed: 1182cc (+6cc for every 0bit in the result)
- ;Size: 29 bytes
- ;Inputs:
- ; DE is the numerator
- ; BC is the denominator
- ;Outputs:
- ; HL is the quotient
- ; DE is the remainder
- ; BC is not changed
- ; z flag is set
- ; c flag is reset
- ;===============================================================
- ex de,hl
- ;===============================================================
- DE_Div_BC:
- ;===============================================================
- ;Performs DE/BC
- ;Speed: 1178cc (+6cc for every 0bit in the result)
- ;Size: 28 bytes
- ;Inputs:
- ; HL is the numerator
- ; BC is the denominator
- ;Outputs:
- ; HL is the quotient
- ; DE is the remainder
- ; BC is not changed
- ; z flag is set
- ; c flag is reset
- ;===============================================================
- ld hl,0
- DE_Div_BC_continue:
- ld a,e
- ld e,16
- Div16Loop:
- rla
- rl d
- adc hl,hl
- sbc hl,bc
- jr nc,+_
- add hl,bc
- _:
- dec e
- jr nz,Div16Loop
- rla
- cpl
- ld e,a
- ld a,d
- rla
- cpl
- ld d,a
- ex de,hl
- ret
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