Another of Dmitry Kiryashov's routines is this sequence of instructions for swapping bit pairs in a byte in five instructions/cycles.
; (c) 1998 by Dmitry Kirashov movwf X ; Save the Incoming Byte in ; a temporary register ; w = X = ABCDEFGH andlw 0x055 ; w = 0B0D0F0H addwf X, f ; X = ABCDEFGH + 0B0D0F0H rrf X, f ; X = (ABCDEFGH + 0B0D0F0h) >> 1 addwf X, w ; w = BADCFEHG
|file: /Techref/microchip/math/bit/swapbits.htm, 1KB, , updated: 2004/12/6 12:55, local time: 2017/10/21 18:33,
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<A HREF="http://www.piclist.com/techref/microchip/math/bit/swapbits.htm"> PIC Microcontoller Bit Math Method Swap two bits in a register</A>
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