;******************************************************************************* ; Input: unpacked BCD in tenk:thou:hund:tens:ones ;Output: 16 bit binary in hi:lo ; Size: 35 instructions ;Timing: 2+34+2=38 instruction cycles ; ; Notes: ;1) if input is higher than 65535 output is meaningless ;2) algorithm synopsis: ; ;> dec2bin([1 10 100 1000 1e4], 16) ;ans = ;0000000000000001 ;0000000000001010 ;0000000001100100 ;0000001111101000 ;0010011100010000 ; ;Or coded in three levels ('+' represents +1, '-' represents -1): ;000000000000000+ * ones + ;000000000000+0+0 * tens + ;000000000++00+00 * hund + ;00000+0000-0+000 * thou + ;00+0+00-000+0000 * tenk ; ;bin = (((tens+thou+tenk*256)*2+ ; hund+hund*16+thou*256)*2+ ; tens+hund*16-thou*16+tenk*16*256)*2+ ; ones+tenk*16-tenk*256 ; ;January 24, 2001 by Nikolai Golovchenko ;******************************************************************************* dec2bin16 movf tens, w addwf thou, w movwf lo addwf lo, f rlf tenk, w movwf hi swapf hund, w addwf hund, w addwf lo, f movf thou, w addwf hi, f rlf lo, f rlf hi, f swapf hund, w addwf tens, w addwf lo, f swapf tenk, w skpnc iorlw 0x01 addwf hi, f swapf thou, w subwf lo, f skpc decf hi, f clrc rlf lo, f rlf hi, f swapf tenk, w addwf ones, w addwf lo, f movf tenk, w skpnc decf tenk, w subwf hi, f return ;*******************************************************************************
file: /Techref/microchip/math/radix/dec2bin16.htm, 1KB, , updated: 2001/1/26 12:34, local time: 2024/8/14 19:11,
owner: NG--944,
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