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(root)/os/trunk/sys/src/libc/386/strlen.s – Rev 2

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        TEXT    strlen(SB),$0

        MOVL    $0, AX
        MOVL    $-1, CX
        CLD
/*
 * look for end of string
 */

        MOVL    p+0(FP), DI
        REPN;   SCASB

        MOVL    DI, AX
        SUBL    p+0(FP), AX
        SUBL    $1, AX
        RET

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