automatic import of glibcopeneuler20.03

1 files changed, 706 insertions, 0 deletions

diff --git a/Loongarch-Add-ifunc-support-for-strchr-aligned-lsx-l.patch b/Loongarch-Add-ifunc-support-for-strchr-aligned-lsx-l.patch
new file mode 100644
index 0000000..03e1299
--- /dev/null
+++ b/Loongarch-Add-ifunc-support-for-strchr-aligned-lsx-l.patch
@@ -0,0 +1,706 @@
+From aca7d7f0dde5f56344e8e58e5f6648c96bb1f1cc Mon Sep 17 00:00:00 2001
+From: dengjianbo <dengjianbo@loongson.cn>
+Date: Tue, 15 Aug 2023 09:08:11 +0800
+Subject: [PATCH 06/29] Loongarch: Add ifunc support for strchr{aligned, lsx,
+ lasx} and strchrnul{aligned, lsx, lasx}
+
+These implementations improve the time to run strchr{nul}
+microbenchmark in glibc as below:
+strchr-lasx       reduces the runtime about 50%-83%
+strchr-lsx        reduces the runtime about 30%-67%
+strchr-aligned    reduces the runtime about 10%-20%
+strchrnul-lasx    reduces the runtime about 50%-83%
+strchrnul-lsx     reduces the runtime about 36%-65%
+strchrnul-aligned reduces the runtime about 6%-10%
+
+Signed-off-by: Peng Fan <fanpeng@loongson.cn>
+Signed-off-by: ticat_fp <fanpeng@loongson.cn>
+---
+ sysdeps/loongarch/lp64/multiarch/Makefile     |  6 ++
+ .../lp64/multiarch/ifunc-impl-list.c          | 16 +++
+ .../loongarch/lp64/multiarch/ifunc-strchr.h   | 41 ++++++++
+ .../lp64/multiarch/ifunc-strchrnul.h          | 41 ++++++++
+ .../loongarch/lp64/multiarch/strchr-aligned.S | 99 +++++++++++++++++++
+ .../loongarch/lp64/multiarch/strchr-lasx.S    | 91 +++++++++++++++++
+ sysdeps/loongarch/lp64/multiarch/strchr-lsx.S | 73 ++++++++++++++
+ sysdeps/loongarch/lp64/multiarch/strchr.c     | 36 +++++++
+ .../lp64/multiarch/strchrnul-aligned.S        | 95 ++++++++++++++++++
+ .../loongarch/lp64/multiarch/strchrnul-lasx.S | 22 +++++
+ .../loongarch/lp64/multiarch/strchrnul-lsx.S  | 22 +++++
+ sysdeps/loongarch/lp64/multiarch/strchrnul.c  | 39 ++++++++
+ 12 files changed, 581 insertions(+)
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/ifunc-strchr.h
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/ifunc-strchrnul.h
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchr-aligned.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchr-lasx.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchr-lsx.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchr.c
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchrnul-aligned.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchrnul-lasx.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchrnul-lsx.S
+ create mode 100644 sysdeps/loongarch/lp64/multiarch/strchrnul.c
+
+diff --git a/sysdeps/loongarch/lp64/multiarch/Makefile b/sysdeps/loongarch/lp64/multiarch/Makefile
+index 76c506c9..110a8c5c 100644
+--- a/sysdeps/loongarch/lp64/multiarch/Makefile
++++ b/sysdeps/loongarch/lp64/multiarch/Makefile
+@@ -3,5 +3,11 @@ sysdep_routines += \
+   strlen-aligned \
+   strlen-lsx \
+   strlen-lasx \
++  strchr-aligned \
++  strchr-lsx \
++  strchr-lasx \
++  strchrnul-aligned \
++  strchrnul-lsx \
++  strchrnul-lasx \
+ # sysdep_routines
+ endif
+diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
+index 1a2a576f..c7164b45 100644
+--- a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
++++ b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
+@@ -37,5 +37,21 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
+ #endif
+ 	      IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_aligned)
+ 	      )
++
++  IFUNC_IMPL (i, name, strchr,
++#if !defined __loongarch_soft_float
++	      IFUNC_IMPL_ADD (array, i, strchr, SUPPORT_LASX, __strchr_lasx)
++	      IFUNC_IMPL_ADD (array, i, strchr, SUPPORT_LSX, __strchr_lsx)
++#endif
++	      IFUNC_IMPL_ADD (array, i, strchr, 1, __strchr_aligned)
++	      )
++
++  IFUNC_IMPL (i, name, strchrnul,
++#if !defined __loongarch_soft_float
++	      IFUNC_IMPL_ADD (array, i, strchrnul, SUPPORT_LASX, __strchrnul_lasx)
++	      IFUNC_IMPL_ADD (array, i, strchrnul, SUPPORT_LSX, __strchrnul_lsx)
++#endif
++	      IFUNC_IMPL_ADD (array, i, strchrnul, 1, __strchrnul_aligned)
++	      )
+   return i;
+ }
+diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-strchr.h b/sysdeps/loongarch/lp64/multiarch/ifunc-strchr.h
+new file mode 100644
+index 00000000..4494db79
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/ifunc-strchr.h
+@@ -0,0 +1,41 @@
++/* Common definition for strchr ifunc selections.
++   All versions must be listed in ifunc-impl-list.c.
++   Copyright (C) 2023 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 <ldsodefs.h>
++#include <ifunc-init.h>
++
++#if !defined __loongarch_soft_float
++extern __typeof (REDIRECT_NAME) OPTIMIZE (lasx) attribute_hidden;
++extern __typeof (REDIRECT_NAME) OPTIMIZE (lsx) attribute_hidden;
++#endif
++
++extern __typeof (REDIRECT_NAME) OPTIMIZE (aligned) attribute_hidden;
++
++static inline void *
++IFUNC_SELECTOR (void)
++{
++#if !defined __loongarch_soft_float
++  if (SUPPORT_LASX)
++    return OPTIMIZE (lasx);
++  else if (SUPPORT_LSX)
++    return OPTIMIZE (lsx);
++  else
++#endif
++    return OPTIMIZE (aligned);
++}
+diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-strchrnul.h b/sysdeps/loongarch/lp64/multiarch/ifunc-strchrnul.h
+new file mode 100644
+index 00000000..8a925120
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/ifunc-strchrnul.h
+@@ -0,0 +1,41 @@
++/* Common definition for strchrnul ifunc selections.
++   All versions must be listed in ifunc-impl-list.c.
++   Copyright (C) 2023 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 <ldsodefs.h>
++#include <ifunc-init.h>
++
++#if !defined __loongarch_soft_float
++extern __typeof (REDIRECT_NAME) OPTIMIZE (lasx) attribute_hidden;
++extern __typeof (REDIRECT_NAME) OPTIMIZE (lsx) attribute_hidden;
++#endif
++
++extern __typeof (REDIRECT_NAME) OPTIMIZE (aligned) attribute_hidden;
++
++static inline void *
++IFUNC_SELECTOR (void)
++{
++#if !defined __loongarch_soft_float
++  if (SUPPORT_LASX)
++    return OPTIMIZE (lasx);
++  else if (SUPPORT_LSX)
++    return OPTIMIZE (lsx);
++  else
++#endif
++    return OPTIMIZE (aligned);
++}
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchr-aligned.S b/sysdeps/loongarch/lp64/multiarch/strchr-aligned.S
+new file mode 100644
+index 00000000..5fb01806
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchr-aligned.S
+@@ -0,0 +1,99 @@
++/* Optimized strchr implementation using basic Loongarch instructions.
++   Copyright (C) 2023 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>
++#include <sys/regdef.h>
++#include <sys/asm.h>
++
++#if IS_IN (libc)
++# define STRCHR_NAME __strchr_aligned
++#else
++# define STRCHR_NAME strchr
++#endif
++
++LEAF(STRCHR_NAME, 6)
++    slli.d      t1, a0, 3
++    bstrins.d   a0, zero, 2, 0
++    lu12i.w     a2, 0x01010
++    ld.d        t2, a0, 0
++
++    ori         a2, a2, 0x101
++    andi        a1, a1, 0xff
++    bstrins.d   a2, a2, 63, 32
++    li.w        t0, -1
++
++    mul.d       a1, a1, a2
++    sll.d       t0, t0, t1
++    slli.d      a3, a2, 7
++    orn         t2, t2, t0
++
++    sll.d       t3, a1, t1
++    xor         t4, t2, t3
++    sub.d       a4, t2, a2
++    sub.d       a5, t4, a2
++
++
++    andn        a4, a4, t2
++    andn        a5, a5, t4
++    or          t0, a4, a5
++    and         t0, t0, a3
++
++    bnez        t0, L(end)
++    addi.d      a0, a0, 8
++L(loop):
++    ld.d        t4, a0, 0
++    xor         t2, t4, a1
++
++    sub.d       a4, t4, a2
++    sub.d       a5, t2, a2
++    andn        a4, a4, t4
++    andn        a5, a5, t2
++
++    or          t0, a4, a5
++    and         t0, t0, a3
++    bnez        t0, L(end)
++    ld.d        t4, a0, 8
++
++
++    addi.d      a0, a0, 16
++    xor         t2, t4, a1
++    sub.d       a4, t4, a2
++    sub.d       a5, t2, a2
++
++    andn        a4, a4, t4
++    andn        a5, a5, t2
++    or          t0, a4, a5
++    and         t0, t0, a3
++
++    beqz        t0, L(loop)
++    addi.d      a0, a0, -8
++L(end):
++    and         t0, a5, a3
++    and         t1, a4, a3
++
++    ctz.d       t0, t0
++    ctz.d       t1, t1
++    srli.w      t2, t0, 3
++    sltu        t3, t1, t0
++
++
++    add.d       a0, a0, t2
++    masknez     a0, a0, t3
++    jr          ra
++END(STRCHR_NAME)
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchr-lasx.S b/sysdeps/loongarch/lp64/multiarch/strchr-lasx.S
+new file mode 100644
+index 00000000..254402da
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchr-lasx.S
+@@ -0,0 +1,91 @@
++/* Optimized strchr implementation using loongarch LASX SIMD instructions.
++   Copyright (C) 2023 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>
++#include <sys/regdef.h>
++#include <sys/asm.h>
++
++#if IS_IN (libc) && !defined __loongarch_soft_float
++
++#ifndef AS_STRCHRNUL
++# define STRCHR __strchr_lasx
++#endif
++
++LEAF(STRCHR, 6)
++    andi            t1, a0, 0x1f
++    bstrins.d       a0, zero, 4, 0
++    xvld            xr0, a0, 0
++    li.d            t2, -1
++
++    xvreplgr2vr.b   xr1, a1
++    sll.d           t1, t2, t1
++    xvxor.v         xr2, xr0, xr1
++    xvmin.bu        xr0, xr0, xr2
++
++    xvmsknz.b       xr0, xr0
++    xvpickve.w      xr3, xr0, 4
++    vilvl.h         vr0, vr3, vr0
++    movfr2gr.s      t0, fa0
++
++    orn             t0, t0, t1
++    bne             t0, t2, L(end)
++    addi.d          a0, a0, 32
++    nop
++
++
++L(loop):
++    xvld            xr0, a0, 0
++    xvxor.v         xr2, xr0, xr1
++    xvmin.bu        xr0, xr0, xr2
++    xvsetanyeqz.b   fcc0, xr0
++
++    bcnez           fcc0, L(loop_end)
++    xvld            xr0, a0, 32
++    addi.d          a0, a0, 64
++    xvxor.v         xr2, xr0, xr1
++
++    xvmin.bu        xr0, xr0, xr2
++    xvsetanyeqz.b   fcc0, xr0
++    bceqz           fcc0, L(loop)
++    addi.d          a0, a0, -32
++
++L(loop_end):
++    xvmsknz.b       xr0, xr0
++    xvpickve.w      xr1, xr0, 4
++    vilvl.h         vr0, vr1, vr0
++    movfr2gr.s      t0, fa0
++
++
++L(end):
++    cto.w           t0, t0
++    add.d           a0, a0, t0
++#ifndef AS_STRCHRNUL
++    vreplgr2vr.b    vr0, t0
++    xvpermi.q       xr3, xr2, 1
++
++    vshuf.b         vr0, vr3, vr2, vr0
++    vpickve2gr.bu   t0, vr0, 0
++    masknez         a0, a0, t0
++#endif
++    jr              ra
++
++END(STRCHR)
++
++libc_hidden_builtin_def(STRCHR)
++#endif
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S b/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S
+new file mode 100644
+index 00000000..dae98b0a
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S
+@@ -0,0 +1,73 @@
++/* Optimized strlen implementation using loongarch LSX SIMD instructions.
++   Copyright (C) 2023 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>
++#include <sys/regdef.h>
++#include <sys/asm.h>
++
++#if IS_IN (libc) && !defined __loongarch_soft_float
++
++#ifndef AS_STRCHRNUL
++# define STRCHR __strchr_lsx
++#endif
++
++LEAF(STRCHR, 6)
++    andi            t1, a0, 0xf
++    bstrins.d       a0, zero, 3, 0
++    vld             vr0, a0, 0
++    li.d            t2, -1
++
++    vreplgr2vr.b    vr1, a1
++    sll.d           t3, t2, t1
++    vxor.v          vr2, vr0, vr1
++    vmin.bu         vr0, vr0, vr2
++
++    vmsknz.b        vr0, vr0
++    movfr2gr.s      t0, fa0
++    ext.w.h         t0, t0
++    orn             t0, t0, t3
++
++    beq             t0, t2, L(loop)
++L(found):
++    cto.w           t0, t0
++    add.d           a0, a0, t0
++#ifndef AS_STRCHRNUL
++    vreplve.b       vr2, vr2, t0
++    vpickve2gr.bu   t1, vr2, 0
++    masknez         a0, a0, t1
++#endif
++    jr              ra
++
++
++L(loop):
++    vld             vr0, a0, 16
++    addi.d          a0, a0, 16
++    vxor.v          vr2, vr0, vr1
++    vmin.bu         vr0, vr0, vr2
++
++    vsetanyeqz.b    fcc0, vr0
++    bceqz           fcc0, L(loop)
++    vmsknz.b        vr0, vr0
++    movfr2gr.s      t0, fa0
++
++    b               L(found)
++END(STRCHR)
++
++libc_hidden_builtin_def (STRCHR)
++#endif
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchr.c b/sysdeps/loongarch/lp64/multiarch/strchr.c
+new file mode 100644
+index 00000000..404e97bd
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchr.c
+@@ -0,0 +1,36 @@
++/* Multiple versions of strchr.
++   All versions must be listed in ifunc-impl-list.c.
++   Copyright (C) 2023 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/>.  */
++
++/* Define multiple versions only for the definition in libc.  */
++#if IS_IN (libc)
++# define strchr __redirect_strchr
++# include <string.h>
++# undef strchr
++
++# define SYMBOL_NAME strchr
++# include "ifunc-strchr.h"
++
++libc_ifunc_redirected (__redirect_strchr, strchr, IFUNC_SELECTOR ());
++weak_alias(strchr, index)
++# ifdef SHARED
++__hidden_ver1 (strchr, __GI_strchr, __redirect_strchr)
++  __attribute__ ((visibility ("hidden"))) __attribute_copy__ (strchr);
++# endif
++
++#endif
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchrnul-aligned.S b/sysdeps/loongarch/lp64/multiarch/strchrnul-aligned.S
+new file mode 100644
+index 00000000..1c01a023
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchrnul-aligned.S
+@@ -0,0 +1,95 @@
++/* Optimized strchrnul implementation using basic Loongarch instructions.
++   Copyright (C) 2023 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>
++#include <sys/regdef.h>
++#include <sys/asm.h>
++
++#if IS_IN (libc)
++# define STRCHRNUL_NAME __strchrnul_aligned
++#else
++# define STRCHRNUL_NAME __strchrnul
++#endif
++
++LEAF(STRCHRNUL_NAME, 6)
++    slli.d      t1, a0, 3
++    bstrins.d   a0, zero, 2, 0
++    lu12i.w     a2, 0x01010
++    ld.d        t2, a0, 0
++
++    ori         a2, a2, 0x101
++    andi        a1, a1, 0xff
++    bstrins.d   a2, a2, 63, 32
++    li.w        t0, -1
++
++    mul.d       a1, a1, a2
++    sll.d       t0, t0, t1
++    slli.d      a3, a2, 7
++    orn         t2, t2, t0
++
++    sll.d       t3, a1, t1
++    xor         t4, t2, t3
++    sub.d       a4, t2, a2
++    sub.d       a5, t4, a2
++
++
++    andn        a4, a4, t2
++    andn        a5, a5, t4
++    or          t0, a4, a5
++    and         t0, t0, a3
++
++    bnez        t0, L(end)
++    addi.d      a0, a0, 8
++L(loop):
++    ld.d        t4, a0, 0
++    xor         t2, t4, a1
++
++    sub.d       a4, t4, a2
++    sub.d       a5, t2, a2
++    andn        a4, a4, t4
++    andn        a5, a5, t2
++
++    or          t0, a4, a5
++    and         t0, t0, a3
++    bnez        t0, L(end)
++    ld.d        t4, a0, 8
++
++
++    addi.d      a0, a0, 16
++    xor         t2, t4, a1
++    sub.d       a4, t4, a2
++    sub.d       a5, t2, a2
++
++    andn        a4, a4, t4
++    andn        a5, a5, t2
++    or          t0, a4, a5
++    and         t0, t0, a3
++
++    beqz        t0, L(loop)
++    addi.d      a0, a0, -8
++L(end):
++    ctz.d       t0, t0
++    srli.w      t0, t0, 3
++
++
++    add.d       a0, a0, t0
++    jr          ra
++END(STRCHRNUL_NAME)
++
++libc_hidden_builtin_def (STRCHRNUL_NAME)
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchrnul-lasx.S b/sysdeps/loongarch/lp64/multiarch/strchrnul-lasx.S
+new file mode 100644
+index 00000000..d45495e4
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchrnul-lasx.S
+@@ -0,0 +1,22 @@
++/* Optimized strchrnul implementation using loongarch LASX SIMD instructions.
++   Copyright (C) 2023 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/>.  */
++
++#define STRCHR __strchrnul_lasx
++#define AS_STRCHRNUL
++#include "strchr-lasx.S"
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchrnul-lsx.S b/sysdeps/loongarch/lp64/multiarch/strchrnul-lsx.S
+new file mode 100644
+index 00000000..07d793ae
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchrnul-lsx.S
+@@ -0,0 +1,22 @@
++/* Optimized strchrnul implementation using loongarch LSX SIMD instructions.
++   Copyright (C) 2023 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/>.  */
++
++#define STRCHR __strchrnul_lsx
++#define AS_STRCHRNUL
++#include "strchr-lsx.S"
+diff --git a/sysdeps/loongarch/lp64/multiarch/strchrnul.c b/sysdeps/loongarch/lp64/multiarch/strchrnul.c
+new file mode 100644
+index 00000000..f3b8296e
+--- /dev/null
++++ b/sysdeps/loongarch/lp64/multiarch/strchrnul.c
+@@ -0,0 +1,39 @@
++/* Multiple versions of strchrnul.
++   All versions must be listed in ifunc-impl-list.c.
++   Copyright (C) 2023 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
++   <http://www.gnu.org/licenses/>.  */
++
++/* Define multiple versions only for the definition in libc.  */
++
++#if IS_IN (libc)
++# define strchrnul __redirect_strchrnul
++# define __strchrnul __redirect___strchrnul
++# include <string.h>
++# undef __strchrnul
++# undef strchrnul
++
++# define SYMBOL_NAME strchrnul
++# include "ifunc-strchrnul.h"
++
++libc_ifunc_redirected (__redirect_strchrnul, __strchrnul,
++                       IFUNC_SELECTOR ());
++weak_alias (__strchrnul, strchrnul)
++# ifdef SHARED
++__hidden_ver1 (__strchrnul, __GI___strchrnul, __redirect_strchrnul)
++  __attribute__((visibility ("hidden"))) __attribute_copy__ (strchrnul);
++# endif
++#endif
+-- 
+2.33.0
+