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64 bit ascii arithmetic

Unfortunately, the books/references I have or can find are pretty old, before 64 bit processors were worth writing about commercially. As a result, they all talk about the aaa, aas, aam, aad cpu instructions, all of which are (according to intel) not available in 64 bit mode. Just wondering if there were similar instructions that would work in 64 bit.

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  • BitByBit_ThorBitByBit_Thor Member Posts: 2,444
    : Unfortunately, the books/references I have or can find are pretty
    : old, before 64 bit processors were worth writing about commercially.
    : As a result, they all talk about the aaa, aas, aam, aad cpu
    : instructions, all of which are (according to intel) not available in
    : 64 bit mode. Just wondering if there were similar instructions that
    : would work in 64 bit.
    :

    If you're not afraid to do some slightly less light reading, then check out Intel's own documentation:
    http://www.intel.com/products/processor/manuals/
    Specifically:
    Intel
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