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 11:55, local time: 2020/11/26 15:54,
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