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- /* 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)
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