diff options
Diffstat (limited to 'libcutils/tests/memset_mips/memset_omips.S')
| -rw-r--r-- | libcutils/tests/memset_mips/memset_omips.S | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/libcutils/tests/memset_mips/memset_omips.S b/libcutils/tests/memset_mips/memset_omips.S new file mode 100644 index 0000000..4c47001 --- /dev/null +++ b/libcutils/tests/memset_mips/memset_omips.S @@ -0,0 +1,90 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Hartvig Ekner <hartvige@mips.com>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* void *memset_omips(void *s, int c, size_t n). */ + +#include "machine/asm.h" + +#ifdef __mips64 +#error mips32 code being compiled for mips64! +#endif + +#if defined(__MIPSEB__) +#error big-endian is not supported in Broadcom MIPS Android platform +# define SWHI swl /* high part is left in big-endian */ +#else +# define SWHI swr /* high part is right in little-endian */ +#endif + +LEAF (memset_omips,0) + .set noreorder + + slti t1, a2, 8 # Less than 8? + bne t1, zero, .Llast8 + move v0, a0 # Setup exit value before too late + + beq a1, zero, .Lueven # If zero pattern, no need to extend + andi a1, 0xff # Avoid problems with bogus arguments + sll t0, a1, 8 + or a1, t0 + sll t0, a1, 16 + or a1, t0 # a1 is now pattern in full word + +.Lueven: + subu t0, zero, a0 # Unaligned address? + andi t0, 0x3 + beq t0, zero, .Lchkw + subu a2, t0 + SWHI a1, 0(a0) # Yes, handle first unaligned part + addu a0, t0 # Now both a0 and a2 are updated + +.Lchkw: + andi t0, a2, 0x7 # Enough left for one loop iteration? + beq t0, a2, .Lchkl + subu a3, a2, t0 + addu a3, a0 # a3 is last loop address +1 + move a2, t0 # a2 is now # of bytes left after loop +.Lloopw: + addiu a0, 8 # Handle 2 words pr. iteration + sw a1, -8(a0) + bne a0, a3, .Lloopw + sw a1, -4(a0) + +.Lchkl: + andi t0, a2, 0x4 # Check if there is at least a full + beq t0, zero, .Llast8 # word remaining after the loop + subu a2, t0 + sw a1, 0(a0) # Yes... + addiu a0, 4 + +.Llast8: + blez a2, .Lexit # Handle last 8 bytes (if cnt>0) + addu a3, a2, a0 # a3 is last address +1 +.Llst8l: + addiu a0, 1 + bne a0, a3, .Llst8l + sb a1, -1(a0) +.Lexit: + j ra # Bye, bye + nop + + .set reorder +END (memset_omips) + + |