mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
239 lines
4.9 KiB
ArmAsm
239 lines
4.9 KiB
ArmAsm
/* The assembly function for memcpy. C-SKY ABIV2 version.
|
|
Copyright (C) 2018-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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>
|
|
|
|
ENTRY (memcpy)
|
|
/* Test if len less than 4 bytes. */
|
|
mov r12, r0
|
|
cmplti r2, 4
|
|
bt .L_copy_by_byte
|
|
|
|
andi r13, r0, 3
|
|
movi r19, 4
|
|
/* Test if dest is not 4 bytes aligned. */
|
|
bnez r13, .L_dest_not_aligned
|
|
.L_dest_aligned:
|
|
/* If dest is aligned, then copy. */
|
|
zext r18, r2, 31, 4
|
|
/* Test if len less than 16 bytes. */
|
|
bez r18, .L_len_less_16bytes
|
|
movi r19, 0
|
|
|
|
LABLE_ALIGN
|
|
.L_len_larger_16bytes:
|
|
#if defined (__CSKY_VDSPV2__)
|
|
vldx.8 vr0, (r1), r19
|
|
PRE_BNEZAD (r18)
|
|
addi r1, 16
|
|
vstx.8 vr0, (r0), r19
|
|
addi r0, 16
|
|
#elif defined (__csky_fpuv2__) && defined(__CK810__)
|
|
fldd fr4, (r1, 0)
|
|
PRE_BNEZAD (r18)
|
|
fstd fr4, (r0, 0)
|
|
fldd fr4, (r1, 8)
|
|
addi r1, 16
|
|
fstd fr4, (r0, 8)
|
|
addi r0, 16
|
|
#elif defined (__CK860__)
|
|
ldw r3, (r1, 0)
|
|
stw r3, (r0, 0)
|
|
ldw r3, (r1, 4)
|
|
stw r3, (r0, 4)
|
|
ldw r3, (r1, 8)
|
|
stw r3, (r0, 8)
|
|
ldw r3, (r1, 12)
|
|
addi r1, 16
|
|
stw r3, (r0, 12)
|
|
addi r0, 16
|
|
#else
|
|
ldw r20, (r1, 0)
|
|
ldw r21, (r1, 4)
|
|
ldw r22, (r1, 8)
|
|
ldw r23, (r1, 12)
|
|
stw r20, (r0, 0)
|
|
stw r21, (r0, 4)
|
|
stw r22, (r0, 8)
|
|
stw r23, (r0, 12)
|
|
PRE_BNEZAD (r18)
|
|
addi r1, 16
|
|
addi r0, 16
|
|
#endif
|
|
BNEZAD (r18, .L_len_larger_16bytes)
|
|
|
|
.L_len_less_16bytes:
|
|
zext r18, r2, 3, 2
|
|
bez r18, .L_copy_by_byte
|
|
.L_len_less_16bytes_loop:
|
|
ldw r3, (r1, 0)
|
|
PRE_BNEZAD (r18)
|
|
addi r1, 4
|
|
stw r3, (r0, 0)
|
|
addi r0, 4
|
|
BNEZAD (r18, .L_len_less_16bytes_loop)
|
|
|
|
/* Test if len less than 4 bytes. */
|
|
.L_copy_by_byte:
|
|
zext r18, r2, 1, 0
|
|
bez r18, .L_return
|
|
.L_copy_by_byte_loop:
|
|
ldb r3, (r1, 0)
|
|
PRE_BNEZAD (r18)
|
|
addi r1, 1
|
|
stb r3, (r0, 0)
|
|
addi r0, 1
|
|
BNEZAD (r18, .L_copy_by_byte_loop)
|
|
|
|
.L_return:
|
|
mov r0, r12
|
|
rts
|
|
|
|
/* If dest is not aligned, just copying some bytes makes the dest
|
|
align. */
|
|
|
|
.L_dest_not_aligned:
|
|
sub r13, r19, r13
|
|
mov r19, r13
|
|
.L_dest_not_aligned_loop:
|
|
/* Makes the dest align. */
|
|
ldb r3, (r1, 0)
|
|
PRE_BNEZAD (r13)
|
|
addi r1, 1
|
|
stb r3, (r0, 0)
|
|
addi r0, 1
|
|
BNEZAD (r13, .L_dest_not_aligned_loop)
|
|
sub r2, r19
|
|
cmplti r2, 4
|
|
bt .L_copy_by_byte
|
|
/* Check whether the src is aligned. */
|
|
br .L_dest_aligned
|
|
END (memcpy)
|
|
|
|
libc_hidden_builtin_def (memcpy)
|
|
.weak memcpy
|
|
|
|
|
|
ENTRY (memmove)
|
|
subu r3, r0, r1
|
|
cmphs r3, r2
|
|
bt memcpy
|
|
|
|
mov r12, r0
|
|
addu r0, r0, r2
|
|
addu r1, r1, r2
|
|
|
|
/* Test if len less than 4 bytes. */
|
|
cmplti r2, 4
|
|
bt .L_copy_by_byte_m
|
|
|
|
andi r13, r0, 3
|
|
/* Test if dest is not 4 bytes aligned. */
|
|
bnez r13, .L_dest_not_aligned_m
|
|
.L_dest_aligned_m:
|
|
/* If dest is aligned, then copy. */
|
|
zext r18, r2, 31, 4
|
|
/* Test if len less than 16 bytes. */
|
|
bez r18, .L_len_less_16bytes_m
|
|
movi r19, 0
|
|
|
|
/* len > 16 bytes */
|
|
LABLE_ALIGN
|
|
.L_len_larger_16bytes_m:
|
|
subi r1, 16
|
|
subi r0, 16
|
|
#if defined (__CSKY_VDSPV2__)
|
|
vldx.8 vr0, (r1), r19
|
|
PRE_BNEZAD (r18)
|
|
vstx.8 vr0, (r0), r19
|
|
#elif defined (__csky_fpuv2__) && defined(__CK810__)
|
|
fldd fr4, (r1, 8)
|
|
PRE_BNEZAD (r18)
|
|
fstd fr4, (r0, 8)
|
|
fldd fr4, (r1, 0)
|
|
fstd fr4, (r0, 0)
|
|
#elif defined (__CK860__)
|
|
ldw r3, (r1, 12)
|
|
stw r3, (r0, 12)
|
|
ldw r3, (r1, 8)
|
|
stw r3, (r0, 8)
|
|
ldw r3, (r1, 4)
|
|
stw r3, (r0, 4)
|
|
ldw r3, (r1, 0)
|
|
stw r3, (r0, 0)
|
|
#else
|
|
ldw r20, (r1, 0)
|
|
ldw r21, (r1, 4)
|
|
ldw r22, (r1, 8)
|
|
ldw r23, (r1, 12)
|
|
stw r20, (r0, 0)
|
|
stw r21, (r0, 4)
|
|
stw r22, (r0, 8)
|
|
stw r23, (r0, 12)
|
|
PRE_BNEZAD (r18)
|
|
#endif
|
|
BNEZAD (r18, .L_len_larger_16bytes_m)
|
|
|
|
.L_len_less_16bytes_m:
|
|
zext r18, r2, 3, 2
|
|
bez r18, .L_copy_by_byte_m
|
|
.L_len_less_16bytes_loop_m:
|
|
subi r1, 4
|
|
subi r0, 4
|
|
ldw r3, (r1, 0)
|
|
PRE_BNEZAD (r18)
|
|
stw r3, (r0, 0)
|
|
BNEZAD (r18, .L_len_less_16bytes_loop_m)
|
|
|
|
/* Test if len less than 4 bytes. */
|
|
.L_copy_by_byte_m:
|
|
zext r18, r2, 1, 0
|
|
bez r18, .L_return_m
|
|
.L_copy_by_byte_loop_m:
|
|
subi r1, 1
|
|
subi r0, 1
|
|
ldb r3, (r1, 0)
|
|
PRE_BNEZAD (r18)
|
|
stb r3, (r0, 0)
|
|
BNEZAD (r18, .L_copy_by_byte_loop_m)
|
|
|
|
.L_return_m:
|
|
mov r0, r12
|
|
rts
|
|
|
|
/* If dest is not aligned, just copying some bytes makes the dest
|
|
align. */
|
|
.L_dest_not_aligned_m:
|
|
sub r2, r13
|
|
.L_dest_not_aligned_loop_m:
|
|
subi r1, 1
|
|
subi r0, 1
|
|
/* Makes the dest align. */
|
|
ldb r3, (r1, 0)
|
|
PRE_BNEZAD (r13)
|
|
stb r3, (r0, 0)
|
|
BNEZAD (r13, .L_dest_not_aligned_loop_m)
|
|
cmplti r2, 4
|
|
bt .L_copy_by_byte_m
|
|
/* Check whether the src is aligned. */
|
|
br .L_dest_aligned_m
|
|
END (memmove)
|
|
|
|
libc_hidden_builtin_def (memmove)
|
|
.weak memmove
|