diff options
Diffstat (limited to 'newlib/libc/machine/rx/strncat.S')
| -rw-r--r-- | newlib/libc/machine/rx/strncat.S | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/newlib/libc/machine/rx/strncat.S b/newlib/libc/machine/rx/strncat.S deleted file mode 100644 index 3bc6b75ae..000000000 --- a/newlib/libc/machine/rx/strncat.S +++ /dev/null @@ -1,35 +0,0 @@ - .file "strncat.S" - - .section .text - .global _strncat - .type _strncat,@function -_strncat: - ;; On entry: r1 => Destination - ;; r2 => Source - ;; r3 => Max number of bytes to copy - - mov r1, r4 ; Save a copy of the dest pointer. - mov r2, r5 ; Save a copy of the source pointer. - mov r3, r14 ; Save a copy of the byte count. - - mov #0, r2 ; Search for the NUL byte. - mov #-1, r3 ; Search until we run out of memory. - suntil.b ; Find the end of the destination string. - sub #1, r1 ; suntil.b leaves r1 pointing to the byte beyond the NUL. - - mov r14, r3 ; Restore the limit on the number of bytes copied. - mov r5, r2 ; Restore the source pointer. - mov r1, r5 ; Save a copy of the dest pointer. - smovu ; Copy source to destination. - - add #0, r14, r3 ; Restore the number of bytes to copy (again), but this time set the Z flag as well. - beq 1f ; If we copied 0 bytes then we already know that the dest string is NUL terminated, so we do not have to do anything. - mov #0, r2 ; Otherwise we must check to see if a NUL byte - mov r5, r1 ; was included in the bytes that were copied. - suntil.b - beq 1f ; Z flag is set if a match was found. - add r14, r5 ; Point at byte after end of copied bytes. - mov.b #0, [r5] ; Store a NUL there. -1: - mov r4, r1 ; Return the original dest pointer. - rts |