Return to memcmp.m CVS log

Up to [MW Coherent from dump] / coherent / b / lib / libc / string / i8086

Annotation of coherent/b/lib/libc/string/i8086/memcmp.m, revision 1.1

1.1     ! root        1: //////////
        !             2: / i8086 C string library.
        !             3: / memcmp()
        !             4: / ANSI 4.11.4.1.
        !             5: //////////
        !             6: 
        !             7: //////////
        !             8: / memcmp(String1, String2, Count)
        !             9: / char *String1, *String2;
        !            10: / int Count;
        !            11: /
        !            12: / Compare Count bytes of String2 and String1.
        !            13: //////////
        !            14: 
        !            15: #include <larges.h>
        !            16: 
        !            17: String1        =       LEFTARG
        !            18: String2        =       String1+DPL
        !            19: Count  =       String2+DPL
        !            20: 
        !            21:        Enter(memcmp_)
        !            22:        mov     cx, Count(bp)   / Count to CX
        !            23:        sub     ax, ax          / Result 0 to AX, set Zero flag in case CX==0
        !            24:        Lds     si, String2(bp) / String2 address to DS:SI
        !            25:        Les     di, String1(bp) / String1 address to ES:DI
        !            26:        cld
        !            27:        repe
        !            28:        cmpsb
        !            29:        je      2f              / String1 == String2
        !            30:        ja      1f
        !            31:        inc     ax              / String1 > String2
        !            32:        jmp     2f
        !            33: 
        !            34: 1:     dec     ax              / String1 < String2
        !            35: 
        !            36: 2:     Leave

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.