diff options
Diffstat (limited to 'sysdeps/mips/mips64/memcpy.S')
| -rw-r--r-- | sysdeps/mips/mips64/memcpy.S | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/sysdeps/mips/mips64/memcpy.S b/sysdeps/mips/mips64/memcpy.S deleted file mode 100644 index eab9463..0000000 --- a/sysdeps/mips/mips64/memcpy.S +++ /dev/null @@ -1,140 +0,0 @@ -/* 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. - Ported to mips3 n32/n64 by Alexandre Oliva <aoliva@redhat.com> - - 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. */ - -#include <sysdep.h> -#include <endian.h> -#include <sys/asm.h> - - -/* void *memcpy(void *s1, const void *s2, size_t n); - - This could probably be optimized further. */ - -#if __BYTE_ORDER == __BIG_ENDIAN -# define LDHI ldl /* high part is left in big-endian */ -# define SDHI sdl /* high part is left in big-endian */ -# define LDLO ldr /* low part is right in big-endian */ -# define SDLO sdr /* low part is right in big-endian */ -#else -# define LDHI ldr /* high part is right in little-endian */ -# define SDHI sdr /* high part is right in little-endian */ -# define LDLO ldl /* low part is left in little-endian */ -# define SDLO sdl /* low part is left in little-endian */ -#endif - -ENTRY (memcpy) - .set noreorder - - slti t0, a2, 16 # Less than 16? - bne t0, zero, L(last16) - move v0, a0 # Setup exit value before too late - - xor t0, a1, a0 # Find a0/a1 displacement - andi t0, 0x7 - bne t0, zero, L(shift) # Go handle the unaligned case - PTR_SUBU t1, zero, a1 - andi t1, 0x7 # a0/a1 are aligned, but are we - beq t1, zero, L(chk8w) # starting in the middle of a word? - PTR_SUBU a2, t1 - LDHI t0, 0(a1) # Yes we are... take care of that - PTR_ADDU a1, t1 - SDHI t0, 0(a0) - PTR_ADDU a0, t1 - -L(chk8w): - andi t0, a2, 0x3f # 64 or more bytes left? - beq t0, a2, L(chk1w) - PTR_SUBU a3, a2, t0 # Yes - PTR_ADDU a3, a1 # a3 = end address of loop - move a2, t0 # a2 = what will be left after loop -L(lop8w): - ld t0, 0(a1) # Loop taking 8 words at a time - ld t1, 8(a1) - ld t2, 16(a1) - ld t3, 24(a1) - ld ta0, 32(a1) - ld ta1, 40(a1) - ld ta2, 48(a1) - ld ta3, 56(a1) - PTR_ADDIU a0, 64 - PTR_ADDIU a1, 64 - sd t0, -64(a0) - sd t1, -56(a0) - sd t2, -48(a0) - sd t3, -40(a0) - sd ta0, -32(a0) - sd ta1, -24(a0) - sd ta2, -16(a0) - bne a1, a3, L(lop8w) - sd ta3, -8(a0) - -L(chk1w): - andi t0, a2, 0x7 # 8 or more bytes left? - beq t0, a2, L(last16) - PTR_SUBU a3, a2, t0 # Yes, handle them one dword at a time - PTR_ADDU a3, a1 # a3 again end address - move a2, t0 -L(lop1w): - ld t0, 0(a1) - PTR_ADDIU a0, 8 - PTR_ADDIU a1, 8 - bne a1, a3, L(lop1w) - sd t0, -8(a0) - -L(last16): - blez a2, L(lst16e) # Handle last 16 bytes, one at a time - PTR_ADDU a3, a2, a1 -L(lst16l): - lb t0, 0(a1) - PTR_ADDIU a0, 1 - PTR_ADDIU a1, 1 - bne a1, a3, L(lst16l) - sb t0, -1(a0) -L(lst16e): - jr ra # Bye, bye - nop - -L(shift): - PTR_SUBU a3, zero, a0 # Src and Dest unaligned - andi a3, 0x7 # (unoptimized case...) - beq a3, zero, L(shft1) - PTR_SUBU a2, a3 # a2 = bytes left - LDHI t0, 0(a1) # Take care of first odd part - LDLO t0, 7(a1) - PTR_ADDU a1, a3 - SDHI t0, 0(a0) - PTR_ADDU a0, a3 -L(shft1): - andi t0, a2, 0x7 - PTR_SUBU a3, a2, t0 - PTR_ADDU a3, a1 -L(shfth): - LDHI t1, 0(a1) # Limp through, dword by dword - LDLO t1, 7(a1) - PTR_ADDIU a0, 8 - PTR_ADDIU a1, 8 - bne a1, a3, L(shfth) - sd t1, -8(a0) - b L(last16) # Handle anything which may be left - move a2, t0 - - .set reorder -END (memcpy) -libc_hidden_builtin_def (memcpy) |