diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2006-05-30 09:13:53 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2006-05-30 09:13:53 +0000 |
| commit | 4fcc031a7085a47b9a027a20a919574f8aab0768 (patch) | |
| tree | ff657fef5414526db2af82bd7af016abaf8a6bd3 /libc/string/bfin/memchr.S | |
| parent | 63e3fcd76cd372cc5a30c414237b6a64d1a210dd (diff) | |
import some optimized functions from blackfin cvs
Diffstat (limited to 'libc/string/bfin/memchr.S')
| -rw-r--r-- | libc/string/bfin/memchr.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/libc/string/bfin/memchr.S b/libc/string/bfin/memchr.S new file mode 100644 index 000000000..6ecaf37a1 --- /dev/null +++ b/libc/string/bfin/memchr.S @@ -0,0 +1,54 @@ +/* memchr.S + * Copyright (C) 2003, 2005, 2006 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 + */ + +/* 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 + +.global _memchr +.type _memchr, STT_FUNC +_memchr: + P0 = R0; // P0 = address + P2 = R2; // P2 = count + R1 = R1.B(Z); + CC = R2 == 0; + IF CC JUMP failed; + +bytes: + LSETUP (byte_loop_s , byte_loop_e) LC0=P2; + +byte_loop_s: + R3 = B[P0++](Z); + CC = R3 == R1; + IF CC JUMP found; + NOP; +byte_loop_e: + +failed: + R0=0; + RTS; + +found: + R0 = P0; + R0 += -1; + RTS; + +.size _memchr,.-_memchr + +libc_hidden_def (memchr) |