Subversion Repositories openrisc_me

        .file   "strcat.S"

        .section .text
        .global  _strcat
        .type    _strcat,@function
_strcat:
        ;; On entry: r1 => Destination
        ;;           r2 => Source
        mov     r1, r4          ; Save a copy of the dest pointer.
        mov     r2, r5          ; Save a copy of the source pointer.
        
        mov     #0,  r2         ; Search for the NUL byte.
        mov     #-1, r3         ; Limit on the number of bytes examined.
        suntil.b                ; Find the end of the destination string.
        sub     #1,  r1         ; suntil.b leaves r1 pointing to the byte beyond the match.

        mov     #-1, r3         ; Set a limit on the number of bytes copied.
        mov     r5,  r2         ; Restore the source pointer.
        smovu                   ; Copy source to destination

        mov     r4, r1          ; Return the original dest pointer.
        rts