diff options
Diffstat (limited to 'newlib/libc/machine/rx/strncpy.S')
| -rw-r--r-- | newlib/libc/machine/rx/strncpy.S | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/newlib/libc/machine/rx/strncpy.S b/newlib/libc/machine/rx/strncpy.S new file mode 100644 index 000000000..e04922a59 --- /dev/null +++ b/newlib/libc/machine/rx/strncpy.S @@ -0,0 +1,18 @@ + .file "strncpy.S" + + .section .text + .global _strncpy + .type _strncpy,@function +_strncpy: + mov r1, r4 ; Save a copy of the dest pointer. + mov r3, r5 ; Save a copy of the byte count + smovu ; Copy the bytes + cmp #0, r3 ; If we have copied the number of bytes requested + beq 1f ; then skip the next bit: + add r4, r5, r1 ; Point to the last byte that we are supposed to write. + sub r3, r1 ; Subtract the number of bytes left to be written. + mov #0, r2 ; Fill the remaining bytes with NULs, + sstr.b +1: + mov r4, r1 ; Return the destination pointer + rts |