sub32: movf a1,w subwf b1,f movf a2,w skpc incfsz a2,w subwf b2,f movf a3,w skpc incfsz a3,w subwf b3,f movf a4,w skpc incfsz a4,w subwf b4,f
Following on from the multi-byte addition routines by Dwayne Reid and Regulus Berdin this works for 32-bit signed/unsigned subtraction. (only tested in Visual Baisc)
sub32 ;OpD=OpD-OpB movf OpB + 0, W subwf OpD + 0, F movf OpB + 1, W skpc incfsz OpB + 1, W subwf OpD + 1, F movf OpB + 2, W skpc incfsz OpB + 2, W subwf OpD + 2, F movf OpB + 3, W skpc incfsz OpB + 3, W subwf OpD + 3, F
|file: /Techref/microchip/math/sub/32bb-drrb.htm, 1KB, , updated: 2016/5/10 10:39, local time: 2022/5/23 05:16,
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