mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-03 02:11:08 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
325 lines
7.3 KiB
ArmAsm
325 lines
7.3 KiB
ArmAsm
/* Copy SIZE bytes from SRC to DEST.
|
|
For UltraSPARC-III.
|
|
Copyright (C) 2001-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David S. Miller (davem@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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
#define ASI_BLK_P 0xf0
|
|
#define FPRS_FEF 0x04
|
|
#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
|
|
#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
|
|
|
|
#ifndef XCC
|
|
#define USE_BPR
|
|
#define XCC xcc
|
|
#endif
|
|
|
|
#if IS_IN (libc)
|
|
|
|
.register %g2,#scratch
|
|
.register %g3,#scratch
|
|
.register %g6,#scratch
|
|
|
|
.text
|
|
|
|
ENTRY(__mempcpy_ultra3)
|
|
ba,pt %XCC, 101f
|
|
add %o0, %o2, %g5
|
|
END(__mempcpy_ultra3)
|
|
|
|
/* Special/non-trivial issues of this code:
|
|
*
|
|
* 1) %o5 is preserved from VISEntryHalf to VISExitHalf
|
|
* 2) Only low 32 FPU registers are used so that only the
|
|
* lower half of the FPU register set is dirtied by this
|
|
* code. This is especially important in the kernel.
|
|
* 3) This code never prefetches cachelines past the end
|
|
* of the source buffer.
|
|
*
|
|
* The cheetah's flexible spine, oversized liver, enlarged heart,
|
|
* slender muscular body, and claws make it the swiftest hunter
|
|
* in Africa and the fastest animal on land. Can reach speeds
|
|
* of up to 2.4GB per second.
|
|
*/
|
|
.align 32
|
|
ENTRY(__memcpy_ultra3)
|
|
|
|
100: /* %o0=dst, %o1=src, %o2=len */
|
|
mov %o0, %g5
|
|
101:
|
|
cmp %o2, 0
|
|
be,pn %XCC, out
|
|
218: or %o0, %o1, %o3
|
|
cmp %o2, 16
|
|
bleu,a,pn %XCC, small_copy
|
|
or %o3, %o2, %o3
|
|
|
|
cmp %o2, 256
|
|
blu,pt %XCC, medium_copy
|
|
andcc %o3, 0x7, %g0
|
|
|
|
ba,pt %xcc, enter
|
|
andcc %o0, 0x3f, %g2
|
|
|
|
/* Here len >= 256 and condition codes reflect execution
|
|
* of "andcc %o0, 0x7, %g2", done by caller.
|
|
*/
|
|
.align 64
|
|
enter:
|
|
/* Is 'dst' already aligned on an 64-byte boundary? */
|
|
be,pt %XCC, 2f
|
|
|
|
/* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number
|
|
* of bytes to copy to make 'dst' 64-byte aligned. We pre-
|
|
* subtract this from 'len'.
|
|
*/
|
|
sub %g2, 0x40, %g2
|
|
sub %g0, %g2, %g2
|
|
sub %o2, %g2, %o2
|
|
|
|
/* Copy %g2 bytes from src to dst, one byte at a time. */
|
|
1: ldub [%o1 + 0x00], %o3
|
|
add %o1, 0x1, %o1
|
|
add %o0, 0x1, %o0
|
|
subcc %g2, 0x1, %g2
|
|
|
|
bg,pt %XCC, 1b
|
|
stb %o3, [%o0 + -1]
|
|
|
|
2: VISEntryHalf
|
|
and %o1, 0x7, %g1
|
|
ba,pt %xcc, begin
|
|
alignaddr %o1, %g0, %o1
|
|
|
|
.align 64
|
|
begin:
|
|
prefetch [%o1 + 0x000], #one_read
|
|
prefetch [%o1 + 0x040], #one_read
|
|
andn %o2, (0x40 - 1), %o4
|
|
prefetch [%o1 + 0x080], #one_read
|
|
prefetch [%o1 + 0x0c0], #one_read
|
|
ldd [%o1 + 0x000], %f0
|
|
prefetch [%o1 + 0x100], #one_read
|
|
ldd [%o1 + 0x008], %f2
|
|
prefetch [%o1 + 0x140], #one_read
|
|
ldd [%o1 + 0x010], %f4
|
|
prefetch [%o1 + 0x180], #one_read
|
|
faligndata %f0, %f2, %f16
|
|
ldd [%o1 + 0x018], %f6
|
|
faligndata %f2, %f4, %f18
|
|
ldd [%o1 + 0x020], %f8
|
|
faligndata %f4, %f6, %f20
|
|
ldd [%o1 + 0x028], %f10
|
|
faligndata %f6, %f8, %f22
|
|
|
|
ldd [%o1 + 0x030], %f12
|
|
faligndata %f8, %f10, %f24
|
|
ldd [%o1 + 0x038], %f14
|
|
faligndata %f10, %f12, %f26
|
|
ldd [%o1 + 0x040], %f0
|
|
|
|
sub %o4, 0x80, %o4
|
|
add %o1, 0x40, %o1
|
|
ba,pt %xcc, loop
|
|
srl %o4, 6, %o3
|
|
|
|
.align 64
|
|
loop:
|
|
ldd [%o1 + 0x008], %f2
|
|
faligndata %f12, %f14, %f28
|
|
ldd [%o1 + 0x010], %f4
|
|
faligndata %f14, %f0, %f30
|
|
stda %f16, [%o0] ASI_BLK_P
|
|
ldd [%o1 + 0x018], %f6
|
|
faligndata %f0, %f2, %f16
|
|
|
|
ldd [%o1 + 0x020], %f8
|
|
faligndata %f2, %f4, %f18
|
|
ldd [%o1 + 0x028], %f10
|
|
faligndata %f4, %f6, %f20
|
|
ldd [%o1 + 0x030], %f12
|
|
faligndata %f6, %f8, %f22
|
|
ldd [%o1 + 0x038], %f14
|
|
faligndata %f8, %f10, %f24
|
|
|
|
ldd [%o1 + 0x040], %f0
|
|
prefetch [%o1 + 0x180], #one_read
|
|
faligndata %f10, %f12, %f26
|
|
subcc %o3, 0x01, %o3
|
|
add %o1, 0x40, %o1
|
|
bg,pt %XCC, loop
|
|
add %o0, 0x40, %o0
|
|
|
|
/* Finally we copy the last full 64-byte block. */
|
|
loopfini:
|
|
ldd [%o1 + 0x008], %f2
|
|
faligndata %f12, %f14, %f28
|
|
ldd [%o1 + 0x010], %f4
|
|
faligndata %f14, %f0, %f30
|
|
stda %f16, [%o0] ASI_BLK_P
|
|
ldd [%o1 + 0x018], %f6
|
|
faligndata %f0, %f2, %f16
|
|
ldd [%o1 + 0x020], %f8
|
|
faligndata %f2, %f4, %f18
|
|
ldd [%o1 + 0x028], %f10
|
|
faligndata %f4, %f6, %f20
|
|
ldd [%o1 + 0x030], %f12
|
|
faligndata %f6, %f8, %f22
|
|
ldd [%o1 + 0x038], %f14
|
|
faligndata %f8, %f10, %f24
|
|
cmp %g1, 0
|
|
be,pt %XCC, 1f
|
|
add %o0, 0x40, %o0
|
|
ldd [%o1 + 0x040], %f0
|
|
1: faligndata %f10, %f12, %f26
|
|
faligndata %f12, %f14, %f28
|
|
faligndata %f14, %f0, %f30
|
|
stda %f16, [%o0] ASI_BLK_P
|
|
add %o0, 0x40, %o0
|
|
add %o1, 0x40, %o1
|
|
membar #Sync
|
|
|
|
/* Now we copy the (len modulo 64) bytes at the end.
|
|
* Note how we borrow the %f0 loaded above.
|
|
*
|
|
* Also notice how this code is careful not to perform a
|
|
* load past the end of the src buffer.
|
|
*/
|
|
loopend:
|
|
and %o2, 0x3f, %o2
|
|
andcc %o2, 0x38, %g2
|
|
be,pn %XCC, endcruft
|
|
subcc %g2, 0x8, %g2
|
|
be,pn %XCC, endcruft
|
|
cmp %g1, 0
|
|
|
|
be,a,pt %XCC, 1f
|
|
ldd [%o1 + 0x00], %f0
|
|
|
|
1: ldd [%o1 + 0x08], %f2
|
|
add %o1, 0x8, %o1
|
|
sub %o2, 0x8, %o2
|
|
subcc %g2, 0x8, %g2
|
|
faligndata %f0, %f2, %f8
|
|
std %f8, [%o0 + 0x00]
|
|
be,pn %XCC, endcruft
|
|
add %o0, 0x8, %o0
|
|
ldd [%o1 + 0x08], %f0
|
|
add %o1, 0x8, %o1
|
|
sub %o2, 0x8, %o2
|
|
subcc %g2, 0x8, %g2
|
|
faligndata %f2, %f0, %f8
|
|
std %f8, [%o0 + 0x00]
|
|
bne,pn %XCC, 1b
|
|
add %o0, 0x8, %o0
|
|
|
|
/* If anything is left, we copy it one byte at a time.
|
|
* Note that %g1 is (src & 0x3) saved above before the
|
|
* alignaddr was performed.
|
|
*/
|
|
endcruft:
|
|
cmp %o2, 0
|
|
add %o1, %g1, %o1
|
|
VISExitHalf
|
|
be,pn %XCC, out
|
|
sub %o0, %o1, %o3
|
|
|
|
andcc %g1, 0x7, %g0
|
|
bne,pn %icc, small_copy_unaligned
|
|
andcc %o2, 0x8, %g0
|
|
be,pt %icc, 1f
|
|
nop
|
|
ldx [%o1], %o5
|
|
stx %o5, [%o1 + %o3]
|
|
add %o1, 0x8, %o1
|
|
|
|
1: andcc %o2, 0x4, %g0
|
|
be,pt %icc, 1f
|
|
nop
|
|
lduw [%o1], %o5
|
|
stw %o5, [%o1 + %o3]
|
|
add %o1, 0x4, %o1
|
|
|
|
1: andcc %o2, 0x2, %g0
|
|
be,pt %icc, 1f
|
|
nop
|
|
lduh [%o1], %o5
|
|
sth %o5, [%o1 + %o3]
|
|
add %o1, 0x2, %o1
|
|
|
|
1: andcc %o2, 0x1, %g0
|
|
be,pt %icc, out
|
|
nop
|
|
ldub [%o1], %o5
|
|
ba,pt %xcc, out
|
|
stb %o5, [%o1 + %o3]
|
|
|
|
medium_copy: /* 16 < len <= 64 */
|
|
bne,pn %XCC, small_copy_unaligned
|
|
sub %o0, %o1, %o3
|
|
|
|
medium_copy_aligned:
|
|
andn %o2, 0x7, %o4
|
|
and %o2, 0x7, %o2
|
|
1: subcc %o4, 0x8, %o4
|
|
ldx [%o1], %o5
|
|
stx %o5, [%o1 + %o3]
|
|
bgu,pt %XCC, 1b
|
|
add %o1, 0x8, %o1
|
|
andcc %o2, 0x4, %g0
|
|
be,pt %XCC, 1f
|
|
nop
|
|
sub %o2, 0x4, %o2
|
|
lduw [%o1], %o5
|
|
stw %o5, [%o1 + %o3]
|
|
add %o1, 0x4, %o1
|
|
1: cmp %o2, 0
|
|
be,pt %XCC, out
|
|
nop
|
|
ba,pt %xcc, small_copy_unaligned
|
|
nop
|
|
|
|
small_copy: /* 0 < len <= 16 */
|
|
andcc %o3, 0x3, %g0
|
|
bne,pn %XCC, small_copy_unaligned
|
|
sub %o0, %o1, %o3
|
|
|
|
small_copy_aligned:
|
|
subcc %o2, 4, %o2
|
|
lduw [%o1], %g1
|
|
stw %g1, [%o1 + %o3]
|
|
bgu,pt %XCC, small_copy_aligned
|
|
add %o1, 4, %o1
|
|
|
|
out: retl
|
|
mov %g5, %o0
|
|
|
|
.align 32
|
|
small_copy_unaligned:
|
|
subcc %o2, 1, %o2
|
|
ldub [%o1], %g1
|
|
stb %g1, [%o1 + %o3]
|
|
bgu,pt %XCC, small_copy_unaligned
|
|
add %o1, 1, %o1
|
|
retl
|
|
mov %g5, %o0
|
|
|
|
END(__memcpy_ultra3)
|
|
|
|
#endif |