mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
348 lines
8.2 KiB
ArmAsm
348 lines
8.2 KiB
ArmAsm
/* Copy SIZE bytes from SRC to DEST. For SUN4V Niagara.
|
|
Copyright (C) 2006-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David S. Miller (davem@davemloft.net)
|
|
|
|
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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
|
|
#define ASI_P 0x80
|
|
#define ASI_PNF 0x82
|
|
|
|
#define LOAD(type,addr,dest) type##a [addr] ASI_P, dest
|
|
#define LOAD_TWIN(addr_reg,dest0,dest1) \
|
|
ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_P, dest0
|
|
|
|
#define STORE(type,src,addr) type src, [addr]
|
|
#define STORE_INIT(src,addr) stxa src, [addr] %asi
|
|
|
|
#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_niagara1)
|
|
ba,pt %XCC, 101f
|
|
add %o0, %o2, %g5
|
|
END(__mempcpy_niagara1)
|
|
|
|
.align 32
|
|
ENTRY(__memcpy_niagara1)
|
|
100: /* %o0=dst, %o1=src, %o2=len */
|
|
mov %o0, %g5
|
|
101:
|
|
# ifndef USE_BPR
|
|
srl %o2, 0, %o2
|
|
# endif
|
|
cmp %o2, 0
|
|
be,pn %XCC, 85f
|
|
218: or %o0, %o1, %o3
|
|
cmp %o2, 16
|
|
blu,a,pn %XCC, 80f
|
|
or %o3, %o2, %o3
|
|
|
|
/* 2 blocks (128 bytes) is the minimum we can do the block
|
|
* copy with. We need to ensure that we'll iterate at least
|
|
* once in the block copy loop. At worst we'll need to align
|
|
* the destination to a 64-byte boundary which can chew up
|
|
* to (64 - 1) bytes from the length before we perform the
|
|
* block copy loop.
|
|
*/
|
|
cmp %o2, (2 * 64)
|
|
blu,pt %XCC, 70f
|
|
andcc %o3, 0x7, %g0
|
|
|
|
/* %o0: dst
|
|
* %o1: src
|
|
* %o2: len (known to be >= 128)
|
|
*
|
|
* The block copy loops will use %o4/%o5,%g2/%g3 as
|
|
* temporaries while copying the data.
|
|
*/
|
|
|
|
LOAD(prefetch, %o1, #one_read)
|
|
wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
|
|
|
|
/* Align destination on 64-byte boundary. */
|
|
andcc %o0, (64 - 1), %o4
|
|
be,pt %XCC, 2f
|
|
sub %o4, 64, %o4
|
|
sub %g0, %o4, %o4 ! bytes to align dst
|
|
sub %o2, %o4, %o2
|
|
1: subcc %o4, 1, %o4
|
|
LOAD(ldub, %o1, %g1)
|
|
STORE(stb, %g1, %o0)
|
|
add %o1, 1, %o1
|
|
bne,pt %XCC, 1b
|
|
add %o0, 1, %o0
|
|
|
|
/* If the source is on a 16-byte boundary we can do
|
|
* the direct block copy loop. If it is 8-byte aligned
|
|
* we can do the 16-byte loads offset by -8 bytes and the
|
|
* init stores offset by one register.
|
|
*
|
|
* If the source is not even 8-byte aligned, we need to do
|
|
* shifting and masking (basically integer faligndata).
|
|
*
|
|
* The careful bit with init stores is that if we store
|
|
* to any part of the cache line we have to store the whole
|
|
* cacheline else we can end up with corrupt L2 cache line
|
|
* contents. Since the loop works on 64-bytes of 64-byte
|
|
* aligned store data at a time, this is easy to ensure.
|
|
*/
|
|
2:
|
|
andcc %o1, (16 - 1), %o4
|
|
andn %o2, (64 - 1), %g1 ! block copy loop iterator
|
|
sub %o2, %g1, %o2 ! final sub-block copy bytes
|
|
be,pt %XCC, 50f
|
|
cmp %o4, 8
|
|
be,a,pt %XCC, 10f
|
|
sub %o1, 0x8, %o1
|
|
|
|
/* Neither 8-byte nor 16-byte aligned, shift and mask. */
|
|
mov %g1, %o4
|
|
and %o1, 0x7, %g1
|
|
sll %g1, 3, %g1
|
|
mov 64, %o3
|
|
andn %o1, 0x7, %o1
|
|
LOAD(ldx, %o1, %g2)
|
|
sub %o3, %g1, %o3
|
|
sllx %g2, %g1, %g2
|
|
|
|
#define SWIVEL_ONE_DWORD(SRC, TMP1, TMP2, PRE_VAL, PRE_SHIFT, POST_SHIFT, DST)\
|
|
LOAD(ldx, SRC, TMP1); \
|
|
srlx TMP1, PRE_SHIFT, TMP2; \
|
|
or TMP2, PRE_VAL, TMP2; \
|
|
STORE_INIT(TMP2, DST); \
|
|
sllx TMP1, POST_SHIFT, PRE_VAL;
|
|
|
|
1: add %o1, 0x8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x00)
|
|
add %o1, 0x8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x08)
|
|
add %o1, 0x8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x10)
|
|
add %o1, 0x8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x18)
|
|
add %o1, 32, %o1
|
|
LOAD(prefetch, %o1, #one_read)
|
|
sub %o1, 32 - 8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x20)
|
|
add %o1, 8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x28)
|
|
add %o1, 8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x30)
|
|
add %o1, 8, %o1
|
|
SWIVEL_ONE_DWORD(%o1, %g3, %o5, %g2, %o3, %g1, %o0 + 0x38)
|
|
subcc %o4, 64, %o4
|
|
bne,pt %XCC, 1b
|
|
add %o0, 64, %o0
|
|
|
|
#undef SWIVEL_ONE_DWORD
|
|
|
|
srl %g1, 3, %g1
|
|
ba,pt %XCC, 60f
|
|
add %o1, %g1, %o1
|
|
|
|
10: /* Destination is 64-byte aligned, source was only 8-byte
|
|
* aligned but it has been subtracted by 8 and we perform
|
|
* one twin load ahead, then add 8 back into source when
|
|
* we finish the loop.
|
|
*/
|
|
LOAD_TWIN(%o1, %o4, %o5)
|
|
1: add %o1, 16, %o1
|
|
LOAD_TWIN(%o1, %g2, %g3)
|
|
add %o1, 16 + 32, %o1
|
|
LOAD(prefetch, %o1, #one_read)
|
|
sub %o1, 32, %o1
|
|
STORE_INIT(%o5, %o0 + 0x00) ! initializes cache line
|
|
STORE_INIT(%g2, %o0 + 0x08)
|
|
LOAD_TWIN(%o1, %o4, %o5)
|
|
add %o1, 16, %o1
|
|
STORE_INIT(%g3, %o0 + 0x10)
|
|
STORE_INIT(%o4, %o0 + 0x18)
|
|
LOAD_TWIN(%o1, %g2, %g3)
|
|
add %o1, 16, %o1
|
|
STORE_INIT(%o5, %o0 + 0x20)
|
|
STORE_INIT(%g2, %o0 + 0x28)
|
|
LOAD_TWIN(%o1, %o4, %o5)
|
|
STORE_INIT(%g3, %o0 + 0x30)
|
|
STORE_INIT(%o4, %o0 + 0x38)
|
|
subcc %g1, 64, %g1
|
|
bne,pt %XCC, 1b
|
|
add %o0, 64, %o0
|
|
|
|
ba,pt %XCC, 60f
|
|
add %o1, 0x8, %o1
|
|
|
|
50: /* Destination is 64-byte aligned, and source is 16-byte
|
|
* aligned.
|
|
*/
|
|
1: LOAD_TWIN(%o1, %o4, %o5)
|
|
add %o1, 16, %o1
|
|
LOAD_TWIN(%o1, %g2, %g3)
|
|
add %o1, 16 + 32, %o1
|
|
LOAD(prefetch, %o1, #one_read)
|
|
sub %o1, 32, %o1
|
|
STORE_INIT(%o4, %o0 + 0x00) ! initializes cache line
|
|
STORE_INIT(%o5, %o0 + 0x08)
|
|
LOAD_TWIN(%o1, %o4, %o5)
|
|
add %o1, 16, %o1
|
|
STORE_INIT(%g2, %o0 + 0x10)
|
|
STORE_INIT(%g3, %o0 + 0x18)
|
|
LOAD_TWIN(%o1, %g2, %g3)
|
|
add %o1, 16, %o1
|
|
STORE_INIT(%o4, %o0 + 0x20)
|
|
STORE_INIT(%o5, %o0 + 0x28)
|
|
STORE_INIT(%g2, %o0 + 0x30)
|
|
STORE_INIT(%g3, %o0 + 0x38)
|
|
subcc %g1, 64, %g1
|
|
bne,pt %XCC, 1b
|
|
add %o0, 64, %o0
|
|
/* fall through */
|
|
|
|
60:
|
|
/* %o2 contains any final bytes still needed to be copied
|
|
* over. If anything is left, we copy it one byte at a time.
|
|
*/
|
|
wr %g0, ASI_PNF, %asi
|
|
brz,pt %o2, 85f
|
|
sub %o0, %o1, %o3
|
|
ba,a,pt %XCC, 90f
|
|
|
|
.align 64
|
|
70: /* 16 < len <= 64 */
|
|
bne,pn %XCC, 75f
|
|
sub %o0, %o1, %o3
|
|
|
|
72:
|
|
andn %o2, 0xf, %o4
|
|
and %o2, 0xf, %o2
|
|
1: subcc %o4, 0x10, %o4
|
|
LOAD(ldx, %o1, %o5)
|
|
add %o1, 0x08, %o1
|
|
LOAD(ldx, %o1, %g1)
|
|
sub %o1, 0x08, %o1
|
|
STORE(stx, %o5, %o1 + %o3)
|
|
add %o1, 0x8, %o1
|
|
STORE(stx, %g1, %o1 + %o3)
|
|
bgu,pt %XCC, 1b
|
|
add %o1, 0x8, %o1
|
|
73: andcc %o2, 0x8, %g0
|
|
be,pt %XCC, 1f
|
|
nop
|
|
sub %o2, 0x8, %o2
|
|
LOAD(ldx, %o1, %o5)
|
|
STORE(stx, %o5, %o1 + %o3)
|
|
add %o1, 0x8, %o1
|
|
1: andcc %o2, 0x4, %g0
|
|
be,pt %XCC, 1f
|
|
nop
|
|
sub %o2, 0x4, %o2
|
|
LOAD(lduw, %o1, %o5)
|
|
STORE(stw, %o5, %o1 + %o3)
|
|
add %o1, 0x4, %o1
|
|
1: cmp %o2, 0
|
|
be,pt %XCC, 85f
|
|
nop
|
|
ba,pt %XCC, 90f
|
|
nop
|
|
|
|
75:
|
|
andcc %o0, 0x7, %g1
|
|
sub %g1, 0x8, %g1
|
|
be,pn %icc, 2f
|
|
sub %g0, %g1, %g1
|
|
sub %o2, %g1, %o2
|
|
|
|
1: subcc %g1, 1, %g1
|
|
LOAD(ldub, %o1, %o5)
|
|
STORE(stb, %o5, %o1 + %o3)
|
|
bgu,pt %icc, 1b
|
|
add %o1, 1, %o1
|
|
|
|
2: add %o1, %o3, %o0
|
|
andcc %o1, 0x7, %g1
|
|
bne,pt %icc, 8f
|
|
sll %g1, 3, %g1
|
|
|
|
cmp %o2, 16
|
|
bgeu,pt %icc, 72b
|
|
nop
|
|
ba,a,pt %XCC, 73b
|
|
|
|
8: mov 64, %o3
|
|
andn %o1, 0x7, %o1
|
|
LOAD(ldx, %o1, %g2)
|
|
sub %o3, %g1, %o3
|
|
andn %o2, 0x7, %o4
|
|
sllx %g2, %g1, %g2
|
|
1: add %o1, 0x8, %o1
|
|
LOAD(ldx, %o1, %g3)
|
|
subcc %o4, 0x8, %o4
|
|
srlx %g3, %o3, %o5
|
|
or %o5, %g2, %o5
|
|
STORE(stx, %o5, %o0)
|
|
add %o0, 0x8, %o0
|
|
bgu,pt %icc, 1b
|
|
sllx %g3, %g1, %g2
|
|
|
|
srl %g1, 3, %g1
|
|
andcc %o2, 0x7, %o2
|
|
be,pn %icc, 85f
|
|
add %o1, %g1, %o1
|
|
ba,pt %XCC, 90f
|
|
sub %o0, %o1, %o3
|
|
|
|
.align 64
|
|
80: /* 0 < len <= 16 */
|
|
andcc %o3, 0x3, %g0
|
|
bne,pn %XCC, 90f
|
|
sub %o0, %o1, %o3
|
|
|
|
1:
|
|
subcc %o2, 4, %o2
|
|
LOAD(lduw, %o1, %g1)
|
|
STORE(stw, %g1, %o1 + %o3)
|
|
bgu,pt %XCC, 1b
|
|
add %o1, 4, %o1
|
|
|
|
85: retl
|
|
mov %g5, %o0
|
|
|
|
.align 32
|
|
90:
|
|
subcc %o2, 1, %o2
|
|
LOAD(ldub, %o1, %g1)
|
|
STORE(stb, %g1, %o1 + %o3)
|
|
bgu,pt %XCC, 90b
|
|
add %o1, 1, %o1
|
|
retl
|
|
mov %g5, %o0
|
|
|
|
END(__memcpy_niagara1)
|
|
|
|
#endif
|