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need some help

Discussion in 'Assembly Language Programming (ALP) Forum' started by fmmctg01, May 31, 2011.

  1. fmmctg01

    fmmctg01 New Member

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    how can i set bits 6-10 to all 0's and 1's by using Boolean instruction.
     
  2. xpi0t0s

    xpi0t0s Mentor

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    You can't set a single bit to a 0 and a 1 simultaneously. What exactly do you want to do?
    You can set a bit to zero by ANDing all other bits with 1. To reset bit 4 of an 8-bit int X for instance you would do X &= 11101111b (using the C bitwise and-assign operator; translate according to your CPU).
    You can set a bit to 1 by ORing the bit with 1. To set the same bit as above you would do X |= 00010000b (using the C bitwise or-assign operator).
     
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