16-bit subtraction
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| or a ;to make sure the c flag is reset. Not always necessary if you know the c flag will be reset
sbc hl,bc ;you can do sbc hl,de also.
|
32-bit addition (you mean two 32-bit inputs?)
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| ;Inputs:
; HLBC is one of the 32-bit inputs
; DE points to the other 32-bit input in RAM
;Outputs:
; HLBC is the 32-bit result
; DE is incremented 3 times
; A=H
; c flag is set if there is an overflow
ld a,(de) \ inc de
add a,c \ ld c,a
ld a,(de) \ inc de
adc a,b \ ld b,a
ld a,(de) \ inc de
adc a,l \ ld l,a
ld a,(de)
adc a,h \ ld h,a
ret
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Squaring and square rooting... I will think on it
Also, I am working on a mini math library that will include RAM based math (so all the values will be in RAM). It seems like a few of these commands will need to rely on some memory. If they do, I suggest using the OP registers (11 bytes of RAM each).
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