Merge "Add optimized stpcpy."
This commit is contained in:
Christopher Ferris
Gerrit Code Review
commit
4ec3bc83c6
@ -11,7 +11,6 @@ libc_common_src_files_arm64 := \
|
|||||||
upstream-freebsd/lib/libc/string/wcslen.c \
|
upstream-freebsd/lib/libc/string/wcslen.c \
|
||||||
upstream-freebsd/lib/libc/string/wcsrchr.c \
|
upstream-freebsd/lib/libc/string/wcsrchr.c \
|
||||||
upstream-freebsd/lib/libc/string/wmemcmp.c \
|
upstream-freebsd/lib/libc/string/wmemcmp.c \
|
||||||
upstream-openbsd/lib/libc/string/stpcpy.c \
|
|
||||||
upstream-openbsd/lib/libc/string/stpncpy.c \
|
upstream-openbsd/lib/libc/string/stpncpy.c \
|
||||||
upstream-openbsd/lib/libc/string/strcat.c \
|
upstream-openbsd/lib/libc/string/strcat.c \
|
||||||
upstream-openbsd/lib/libc/string/strlcat.c \
|
upstream-openbsd/lib/libc/string/strlcat.c \
|
||||||
|
|||||||
@ -3,6 +3,7 @@ libc_bionic_src_files_arm64 += \
|
|||||||
arch-arm64/denver64/bionic/memcpy.S \
|
arch-arm64/denver64/bionic/memcpy.S \
|
||||||
arch-arm64/generic/bionic/memmove.S \
|
arch-arm64/generic/bionic/memmove.S \
|
||||||
arch-arm64/denver64/bionic/memset.S \
|
arch-arm64/denver64/bionic/memset.S \
|
||||||
|
arch-arm64/generic/bionic/stpcpy.S \
|
||||||
arch-arm64/generic/bionic/strchr.S \
|
arch-arm64/generic/bionic/strchr.S \
|
||||||
arch-arm64/generic/bionic/strcmp.S \
|
arch-arm64/generic/bionic/strcmp.S \
|
||||||
arch-arm64/generic/bionic/strcpy.S \
|
arch-arm64/generic/bionic/strcpy.S \
|
||||||
|
|||||||
@ -2,6 +2,7 @@ libc_bionic_src_files_arm64 += \
|
|||||||
arch-arm64/generic/bionic/memcmp.S \
|
arch-arm64/generic/bionic/memcmp.S \
|
||||||
arch-arm64/generic/bionic/memmove.S \
|
arch-arm64/generic/bionic/memmove.S \
|
||||||
arch-arm64/generic/bionic/memset.S \
|
arch-arm64/generic/bionic/memset.S \
|
||||||
|
arch-arm64/generic/bionic/stpcpy.S \
|
||||||
arch-arm64/generic/bionic/strchr.S \
|
arch-arm64/generic/bionic/strchr.S \
|
||||||
arch-arm64/generic/bionic/strcmp.S \
|
arch-arm64/generic/bionic/strcmp.S \
|
||||||
arch-arm64/generic/bionic/strcpy.S \
|
arch-arm64/generic/bionic/strcpy.S \
|
||||||
|
|||||||
29
libc/arch-arm64/generic/bionic/stpcpy.S
Normal file
29
libc/arch-arm64/generic/bionic/stpcpy.S
Normal file
@ -0,0 +1,29 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (C) 2014 The Android Open Source Project
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* * Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* * Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in
|
||||||
|
* the documentation and/or other materials provided with the
|
||||||
|
* distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||||
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||||
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||||
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||||
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||||
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||||
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||||
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||||
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||||
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||||
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
#define STPCPY
|
||||||
|
#include "string_copy.S"
|
||||||
@ -25,169 +25,5 @@
|
|||||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
* SUCH DAMAGE.
|
* SUCH DAMAGE.
|
||||||
*/
|
*/
|
||||||
/* Copyright (c) 2014, Linaro Limited
|
#define STRCPY
|
||||||
All rights reserved.
|
#include "string_copy.S"
|
||||||
|
|
||||||
Redistribution and use in source and binary forms, with or without
|
|
||||||
modification, are permitted provided that the following conditions are met:
|
|
||||||
* Redistributions of source code must retain the above copyright
|
|
||||||
notice, this list of conditions and the following disclaimer.
|
|
||||||
* Redistributions in binary form must reproduce the above copyright
|
|
||||||
notice, this list of conditions and the following disclaimer in the
|
|
||||||
documentation and/or other materials provided with the distribution.
|
|
||||||
* Neither the name of the Linaro nor the
|
|
||||||
names of its contributors may be used to endorse or promote products
|
|
||||||
derived from this software without specific prior written permission.
|
|
||||||
|
|
||||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
||||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
||||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
||||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
||||||
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
||||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
||||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
||||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
||||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
||||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
||||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* Assumptions:
|
|
||||||
*
|
|
||||||
* ARMv8-a, AArch64
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <private/bionic_asm.h>
|
|
||||||
|
|
||||||
/* Arguments and results. */
|
|
||||||
#define dstin x0
|
|
||||||
#define src x1
|
|
||||||
|
|
||||||
/* Locals and temporaries. */
|
|
||||||
#define dst x2
|
|
||||||
#define data1 x3
|
|
||||||
#define data1_w w3
|
|
||||||
#define data2 x4
|
|
||||||
#define data2_w w4
|
|
||||||
#define has_nul1 x5
|
|
||||||
#define has_nul1_w w5
|
|
||||||
#define has_nul2 x6
|
|
||||||
#define tmp1 x7
|
|
||||||
#define tmp2 x8
|
|
||||||
#define tmp3 x9
|
|
||||||
#define tmp4 x10
|
|
||||||
#define zeroones x11
|
|
||||||
#define zeroones_w w11
|
|
||||||
#define pos x12
|
|
||||||
|
|
||||||
#define REP8_01 0x0101010101010101
|
|
||||||
#define REP8_7f 0x7f7f7f7f7f7f7f7f
|
|
||||||
#define REP8_80 0x8080808080808080
|
|
||||||
|
|
||||||
ENTRY(strcpy)
|
|
||||||
mov zeroones, #REP8_01
|
|
||||||
mov dst, dstin
|
|
||||||
ands tmp1, src, #15
|
|
||||||
b.ne .Lmisaligned
|
|
||||||
// NUL detection works on the principle that (X - 1) & (~X) & 0x80
|
|
||||||
// (=> (X - 1) & ~(X | 0x7f)) is non-zero iff a byte is zero, and
|
|
||||||
// can be done in parallel across the entire word.
|
|
||||||
// The inner loop deals with two Dwords at a time. This has a
|
|
||||||
// slightly higher start-up cost, but we should win quite quickly,
|
|
||||||
// especially on cores with a high number of issue slots per
|
|
||||||
// cycle, as we get much better parallelism out of the operations.
|
|
||||||
.Lloop:
|
|
||||||
ldp data1, data2, [src], #16
|
|
||||||
sub tmp1, data1, zeroones
|
|
||||||
orr tmp2, data1, #REP8_7f
|
|
||||||
bic has_nul1, tmp1, tmp2
|
|
||||||
cbnz has_nul1, .Lnul_in_data1
|
|
||||||
sub tmp3, data2, zeroones
|
|
||||||
orr tmp4, data2, #REP8_7f
|
|
||||||
bic has_nul2, tmp3, tmp4
|
|
||||||
cbnz has_nul2, .Lnul_in_data2
|
|
||||||
// No NUL in either register, copy it in a single instruction.
|
|
||||||
stp data1, data2, [dst], #16
|
|
||||||
b .Lloop
|
|
||||||
|
|
||||||
.Lnul_in_data1:
|
|
||||||
rev has_nul1, has_nul1
|
|
||||||
clz pos, has_nul1
|
|
||||||
add tmp1, pos, #0x8
|
|
||||||
|
|
||||||
tbz tmp1, #6, 1f
|
|
||||||
str data1, [dst]
|
|
||||||
ret
|
|
||||||
1:
|
|
||||||
tbz tmp1, #5, 1f
|
|
||||||
str data1_w, [dst], #4
|
|
||||||
lsr data1, data1, #32
|
|
||||||
1:
|
|
||||||
tbz tmp1, #4, 1f
|
|
||||||
strh data1_w, [dst], #2
|
|
||||||
lsr data1, data1, #16
|
|
||||||
1:
|
|
||||||
tbz tmp1, #3, 1f
|
|
||||||
strb data1_w, [dst]
|
|
||||||
1:
|
|
||||||
ret
|
|
||||||
|
|
||||||
.Lnul_in_data2:
|
|
||||||
str data1, [dst], #8
|
|
||||||
rev has_nul2, has_nul2
|
|
||||||
clz pos, has_nul2
|
|
||||||
add tmp1, pos, #0x8
|
|
||||||
|
|
||||||
tbz tmp1, #6, 1f
|
|
||||||
str data2, [dst]
|
|
||||||
ret
|
|
||||||
1:
|
|
||||||
tbz tmp1, #5, 1f
|
|
||||||
str data2_w, [dst], #4
|
|
||||||
lsr data2, data2, #32
|
|
||||||
1:
|
|
||||||
tbz tmp1, #4, 1f
|
|
||||||
strh data2_w, [dst], #2
|
|
||||||
lsr data2, data2, #16
|
|
||||||
1:
|
|
||||||
tbz tmp1, #3, 1f
|
|
||||||
strb data2_w, [dst]
|
|
||||||
1:
|
|
||||||
ret
|
|
||||||
|
|
||||||
.Lmisaligned:
|
|
||||||
tbz src, #0, 1f
|
|
||||||
ldrb data1_w, [src], #1
|
|
||||||
strb data1_w, [dst], #1
|
|
||||||
cbnz data1_w, 1f
|
|
||||||
ret
|
|
||||||
1:
|
|
||||||
tbz src, #1, 1f
|
|
||||||
ldrb data1_w, [src], #1
|
|
||||||
strb data1_w, [dst], #1
|
|
||||||
cbz data1_w, .Ldone
|
|
||||||
ldrb data2_w, [src], #1
|
|
||||||
strb data2_w, [dst], #1
|
|
||||||
cbnz data2_w, 1f
|
|
||||||
.Ldone:
|
|
||||||
ret
|
|
||||||
1:
|
|
||||||
tbz src, #2, 1f
|
|
||||||
ldr data1_w, [src], #4
|
|
||||||
// Check for a zero.
|
|
||||||
sub has_nul1_w, data1_w, zeroones_w
|
|
||||||
bic has_nul1_w, has_nul1_w, data1_w
|
|
||||||
ands has_nul1_w, has_nul1_w, #0x80808080
|
|
||||||
b.ne .Lnul_in_data1
|
|
||||||
str data1_w, [dst], #4
|
|
||||||
1:
|
|
||||||
tbz src, #3, .Lloop
|
|
||||||
ldr data1, [src], #8
|
|
||||||
// Check for a zero.
|
|
||||||
sub tmp1, data1, zeroones
|
|
||||||
orr tmp2, data1, #REP8_7f
|
|
||||||
bics has_nul1, tmp1, tmp2
|
|
||||||
b.ne .Lnul_in_data1
|
|
||||||
str data1, [dst], #8
|
|
||||||
b .Lloop
|
|
||||||
END(strcpy)
|
|
||||||
|
|||||||
243
libc/arch-arm64/generic/bionic/string_copy.S
Normal file
243
libc/arch-arm64/generic/bionic/string_copy.S
Normal file
@ -0,0 +1,243 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (C) 2014 The Android Open Source Project
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* * Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* * Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in
|
||||||
|
* the documentation and/or other materials provided with the
|
||||||
|
* distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||||
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||||
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||||
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||||
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||||
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||||
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||||
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||||
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||||
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||||
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
/* Copyright (c) 2014, Linaro Limited
|
||||||
|
All rights reserved.
|
||||||
|
|
||||||
|
Redistribution and use in source and binary forms, with or without
|
||||||
|
modification, are permitted provided that the following conditions are met:
|
||||||
|
* Redistributions of source code must retain the above copyright
|
||||||
|
notice, this list of conditions and the following disclaimer.
|
||||||
|
* Redistributions in binary form must reproduce the above copyright
|
||||||
|
notice, this list of conditions and the following disclaimer in the
|
||||||
|
documentation and/or other materials provided with the distribution.
|
||||||
|
* Neither the name of the Linaro nor the
|
||||||
|
names of its contributors may be used to endorse or promote products
|
||||||
|
derived from this software without specific prior written permission.
|
||||||
|
|
||||||
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||||
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||||
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||||
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||||
|
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||||
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||||
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||||
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||||
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||||
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||||
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Assumptions:
|
||||||
|
*
|
||||||
|
* ARMv8-a, AArch64
|
||||||
|
*/
|
||||||
|
|
||||||
|
#if !defined(STPCPY) && !defined(STRCPY)
|
||||||
|
#error "Either STPCPY or STRCPY must be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <private/bionic_asm.h>
|
||||||
|
|
||||||
|
/* Arguments and results. */
|
||||||
|
#if defined(STPCPY)
|
||||||
|
#define dst x0
|
||||||
|
#elif defined(STRCPY)
|
||||||
|
#define dstin x0
|
||||||
|
#endif
|
||||||
|
#define src x1
|
||||||
|
|
||||||
|
/* Locals and temporaries. */
|
||||||
|
#if defined(STRCPY)
|
||||||
|
#define dst x2
|
||||||
|
#endif
|
||||||
|
#define data1 x3
|
||||||
|
#define data1_w w3
|
||||||
|
#define data2 x4
|
||||||
|
#define data2_w w4
|
||||||
|
#define has_nul1 x5
|
||||||
|
#define has_nul1_w w5
|
||||||
|
#define has_nul2 x6
|
||||||
|
#define tmp1 x7
|
||||||
|
#define tmp2 x8
|
||||||
|
#define tmp3 x9
|
||||||
|
#define tmp4 x10
|
||||||
|
#define zeroones x11
|
||||||
|
#define zeroones_w w11
|
||||||
|
#define pos x12
|
||||||
|
|
||||||
|
#define REP8_01 0x0101010101010101
|
||||||
|
#define REP8_7f 0x7f7f7f7f7f7f7f7f
|
||||||
|
#define REP8_80 0x8080808080808080
|
||||||
|
|
||||||
|
#if defined(STPCPY)
|
||||||
|
ENTRY(stpcpy)
|
||||||
|
#elif defined(STRCPY)
|
||||||
|
ENTRY(strcpy)
|
||||||
|
#endif
|
||||||
|
mov zeroones, #REP8_01
|
||||||
|
#if defined(STRCPY)
|
||||||
|
mov dst, dstin
|
||||||
|
#endif
|
||||||
|
ands tmp1, src, #15
|
||||||
|
b.ne .Lmisaligned
|
||||||
|
// NUL detection works on the principle that (X - 1) & (~X) & 0x80
|
||||||
|
// (=> (X - 1) & ~(X | 0x7f)) is non-zero iff a byte is zero, and
|
||||||
|
// can be done in parallel across the entire word.
|
||||||
|
// The inner loop deals with two Dwords at a time. This has a
|
||||||
|
// slightly higher start-up cost, but we should win quite quickly,
|
||||||
|
// especially on cores with a high number of issue slots per
|
||||||
|
// cycle, as we get much better parallelism out of the operations.
|
||||||
|
.Lloop:
|
||||||
|
ldp data1, data2, [src], #16
|
||||||
|
sub tmp1, data1, zeroones
|
||||||
|
orr tmp2, data1, #REP8_7f
|
||||||
|
bic has_nul1, tmp1, tmp2
|
||||||
|
cbnz has_nul1, .Lnul_in_data1
|
||||||
|
sub tmp3, data2, zeroones
|
||||||
|
orr tmp4, data2, #REP8_7f
|
||||||
|
bic has_nul2, tmp3, tmp4
|
||||||
|
cbnz has_nul2, .Lnul_in_data2
|
||||||
|
// No NUL in either register, copy it in a single instruction.
|
||||||
|
stp data1, data2, [dst], #16
|
||||||
|
b .Lloop
|
||||||
|
|
||||||
|
.Lnul_in_data1:
|
||||||
|
rev has_nul1, has_nul1
|
||||||
|
clz pos, has_nul1
|
||||||
|
add tmp1, pos, #0x8
|
||||||
|
|
||||||
|
tbz tmp1, #6, 1f
|
||||||
|
#if defined(STPCPY)
|
||||||
|
str data1, [dst], #7
|
||||||
|
#elif defined(STRCPY)
|
||||||
|
str data1, [dst]
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
1:
|
||||||
|
tbz tmp1, #5, 1f
|
||||||
|
str data1_w, [dst], #4
|
||||||
|
lsr data1, data1, #32
|
||||||
|
1:
|
||||||
|
tbz tmp1, #4, 1f
|
||||||
|
strh data1_w, [dst], #2
|
||||||
|
lsr data1, data1, #16
|
||||||
|
1:
|
||||||
|
tbz tmp1, #3, 1f
|
||||||
|
strb data1_w, [dst]
|
||||||
|
#if defined(STPCPY)
|
||||||
|
ret
|
||||||
|
#endif
|
||||||
|
1:
|
||||||
|
#if defined(STPCPY)
|
||||||
|
// Back up one so that dst points to the '\0' string terminator.
|
||||||
|
sub dst, dst, #1
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
|
||||||
|
.Lnul_in_data2:
|
||||||
|
str data1, [dst], #8
|
||||||
|
rev has_nul2, has_nul2
|
||||||
|
clz pos, has_nul2
|
||||||
|
add tmp1, pos, #0x8
|
||||||
|
|
||||||
|
tbz tmp1, #6, 1f
|
||||||
|
#if defined(STPCPY)
|
||||||
|
str data2, [dst], #7
|
||||||
|
#elif defined(STRCPY)
|
||||||
|
str data2, [dst]
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
1:
|
||||||
|
tbz tmp1, #5, 1f
|
||||||
|
str data2_w, [dst], #4
|
||||||
|
lsr data2, data2, #32
|
||||||
|
1:
|
||||||
|
tbz tmp1, #4, 1f
|
||||||
|
strh data2_w, [dst], #2
|
||||||
|
lsr data2, data2, #16
|
||||||
|
1:
|
||||||
|
tbz tmp1, #3, 1f
|
||||||
|
strb data2_w, [dst]
|
||||||
|
#if defined(STPCPY)
|
||||||
|
ret
|
||||||
|
#endif
|
||||||
|
1:
|
||||||
|
#if defined(STPCPY)
|
||||||
|
// Back up one so that dst points to the '\0' string terminator.
|
||||||
|
sub dst, dst, #1
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
|
||||||
|
.Lmisaligned:
|
||||||
|
tbz src, #0, 1f
|
||||||
|
ldrb data1_w, [src], #1
|
||||||
|
strb data1_w, [dst], #1
|
||||||
|
cbnz data1_w, 1f
|
||||||
|
#if defined(STPCPY)
|
||||||
|
// Back up one so that dst points to the '\0' string terminator.
|
||||||
|
sub dst, dst, #1
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
1:
|
||||||
|
tbz src, #1, 1f
|
||||||
|
ldrb data1_w, [src], #1
|
||||||
|
strb data1_w, [dst], #1
|
||||||
|
cbz data1_w, .Ldone
|
||||||
|
ldrb data2_w, [src], #1
|
||||||
|
strb data2_w, [dst], #1
|
||||||
|
cbnz data2_w, 1f
|
||||||
|
.Ldone:
|
||||||
|
#if defined(STPCPY)
|
||||||
|
// Back up one so that dst points to the '\0' string terminator.
|
||||||
|
sub dst, dst, #1
|
||||||
|
#endif
|
||||||
|
ret
|
||||||
|
1:
|
||||||
|
tbz src, #2, 1f
|
||||||
|
ldr data1_w, [src], #4
|
||||||
|
// Check for a zero.
|
||||||
|
sub has_nul1_w, data1_w, zeroones_w
|
||||||
|
bic has_nul1_w, has_nul1_w, data1_w
|
||||||
|
ands has_nul1_w, has_nul1_w, #0x80808080
|
||||||
|
b.ne .Lnul_in_data1
|
||||||
|
str data1_w, [dst], #4
|
||||||
|
1:
|
||||||
|
tbz src, #3, .Lloop
|
||||||
|
ldr data1, [src], #8
|
||||||
|
// Check for a zero.
|
||||||
|
sub tmp1, data1, zeroones
|
||||||
|
orr tmp2, data1, #REP8_7f
|
||||||
|
bics has_nul1, tmp1, tmp2
|
||||||
|
b.ne .Lnul_in_data1
|
||||||
|
str data1, [dst], #8
|
||||||
|
b .Lloop
|
||||||
|
#if defined(STPCPY)
|
||||||
|
END(stpcpy)
|
||||||
|
#elif defined(STRCPY)
|
||||||
|
END(strcpy)
|
||||||
|
#endif
|
||||||
@ -3,6 +3,7 @@ libc_bionic_src_files_arm64 += \
|
|||||||
arch-arm64/generic/bionic/memcpy.S \
|
arch-arm64/generic/bionic/memcpy.S \
|
||||||
arch-arm64/generic/bionic/memmove.S \
|
arch-arm64/generic/bionic/memmove.S \
|
||||||
arch-arm64/generic/bionic/memset.S \
|
arch-arm64/generic/bionic/memset.S \
|
||||||
|
arch-arm64/generic/bionic/stpcpy.S \
|
||||||
arch-arm64/generic/bionic/strchr.S \
|
arch-arm64/generic/bionic/strchr.S \
|
||||||
arch-arm64/generic/bionic/strcmp.S \
|
arch-arm64/generic/bionic/strcmp.S \
|
||||||
arch-arm64/generic/bionic/strcpy.S \
|
arch-arm64/generic/bionic/strcpy.S \
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user