1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Hartvig Ekner <hartvige@mips.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 /*#include <sysdep.h>*/
26 #error mips32 code being compiled for mips64!
29 /* void *memset(void *s, int c, size_t n). */
31 #if __BYTE_ORDER == __BIG_ENDIAN
32 # define SWHI swl /* high part is left in big-endian */
34 # define SWHI swr /* high part is right in little-endian */
40 slti t1, a2, 8 # Less than 8?
41 bne t1, zero, L(last8)
42 move v0, a0 # Setup exit value before too late
44 beq a1, zero, L(ueven) # If zero pattern, no need to extend
45 andi a1, 0xff # Avoid problems with bogus arguments
49 or a1, t0 # a1 is now pattern in full word
52 subu t0, zero, a0 # Unaligned address?
56 SWHI a1, 0(a0) # Yes, handle first unaligned part
57 addu a0, t0 # Now both a0 and a2 are updated
60 andi t0, a2, 0x7 # Enough left for one loop iteration?
63 addu a3, a0 # a3 is last loop address +1
64 move a2, t0 # a2 is now # of bytes left after loop
66 addiu a0, 8 # Handle 2 words pr. iteration
72 andi t0, a2, 0x4 # Check if there is at least a full
73 beq t0, zero, L(last8) # word remaining after the loop
79 blez a2, L(exit) # Handle last 8 bytes (if cnt>0)
80 addu a3, a2, a0 # a3 is last address +1
92 libc_hidden_def(memset)