/* memchr.S * Copyright (C) 2003-2007 Analog Devices Inc., All Rights Reserved. * * This file is subject to the terms and conditions of the GNU Library General * Public License. See the file "COPYING.LIB" in the main directory of this * archive for more details. * * Non-LGPL License also available as part of VisualDSP++ * http://www.analog.com/processors/resources/crosscore/visualDspDevSoftware.html */ #include <sysdep.h> /* void *memchr(const void *s, int c, size_t n); * R0 = address (s) * R1 = sought byte (c) * R2 = count (n) * * Returns pointer to located character. */ .text .align 2 .weak _memchr ENTRY(_memchr) P0 = R0; /* P0 = address */ P2 = R2; /* P2 = count */ R1 = R1.B(Z); CC = R2 == 0; IF CC JUMP .Lfailed; .Lbytes: LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2; .Lbyte_loop_s: R3 = B[P0++](Z); CC = R3 == R1; IF CC JUMP .Lfound; .Lbyte_loop_e: NOP; .Lfailed: R0=0; RTS; .Lfound: R0 = P0; R0 += -1; RTS; .size _memchr,.-_memchr libc_hidden_def (memchr)