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From 14032f7bbe18443af8492f5d0365f72b76701673 Mon Sep 17 00:00:00 2001
From: dengjianbo <dengjianbo@loongson.cn>
Date: Mon, 28 Aug 2023 10:08:38 +0800
Subject: [PATCH 17/29] LoongArch: Add ifunc support for memset{aligned,
unaligned, lsx, lasx}
According to glibc memset microbenchmark test results, for LSX and LASX
versions, A few cases with length less than 8 experience performace
degradation, overall, the LASX version could reduce the runtime about
15% - 75%, LSX version could reduce the runtime about 15%-50%.
The unaligned version uses unaligned memmory access to set data which
length is less than 64 and make address aligned with 8. For this part,
the performace is better than aligned version. Comparing with the generic
version, the performance is close when the length is larger than 128. When
the length is 8-128, the unaligned version could reduce the runtime about
30%-70%, the aligned version could reduce the runtime about 20%-50%.
Signed-off-by: Peng Fan <fanpeng@loongson.cn>
Signed-off-by: ticat_fp <fanpeng@loongson.cn>
---
sysdeps/loongarch/lp64/multiarch/Makefile | 4 +
.../lp64/multiarch/dl-symbol-redir-ifunc.h | 24 +++
.../lp64/multiarch/ifunc-impl-list.c | 10 +
.../loongarch/lp64/multiarch/memset-aligned.S | 174 ++++++++++++++++++
.../loongarch/lp64/multiarch/memset-lasx.S | 142 ++++++++++++++
sysdeps/loongarch/lp64/multiarch/memset-lsx.S | 135 ++++++++++++++
.../lp64/multiarch/memset-unaligned.S | 162 ++++++++++++++++
sysdeps/loongarch/lp64/multiarch/memset.c | 37 ++++
8 files changed, 688 insertions(+)
create mode 100644 sysdeps/loongarch/lp64/multiarch/dl-symbol-redir-ifunc.h
create mode 100644 sysdeps/loongarch/lp64/multiarch/memset-aligned.S
create mode 100644 sysdeps/loongarch/lp64/multiarch/memset-lasx.S
create mode 100644 sysdeps/loongarch/lp64/multiarch/memset-lsx.S
create mode 100644 sysdeps/loongarch/lp64/multiarch/memset-unaligned.S
create mode 100644 sysdeps/loongarch/lp64/multiarch/memset.c
diff --git a/sysdeps/loongarch/lp64/multiarch/Makefile b/sysdeps/loongarch/lp64/multiarch/Makefile
index 7b87bc90..216886c5 100644
--- a/sysdeps/loongarch/lp64/multiarch/Makefile
+++ b/sysdeps/loongarch/lp64/multiarch/Makefile
@@ -30,5 +30,9 @@ sysdep_routines += \
memrchr-generic \
memrchr-lsx \
memrchr-lasx \
+ memset-aligned \
+ memset-unaligned \
+ memset-lsx \
+ memset-lasx \
# sysdep_routines
endif
diff --git a/sysdeps/loongarch/lp64/multiarch/dl-symbol-redir-ifunc.h b/sysdeps/loongarch/lp64/multiarch/dl-symbol-redir-ifunc.h
new file mode 100644
index 00000000..e2723873
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/dl-symbol-redir-ifunc.h
@@ -0,0 +1,24 @@
+/* Symbol rediretion for loader/static initialization code.
+ 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/>. */
+
+#ifndef _DL_IFUNC_GENERIC_H
+#define _DL_IFUNC_GENERIC_H
+
+asm ("memset = __memset_aligned");
+
+#endif
diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
index 8bd5489e..37f60dde 100644
--- a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c
@@ -117,5 +117,15 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
#endif
IFUNC_IMPL_ADD (array, i, memrchr, 1, __memrchr_generic)
)
+
+ IFUNC_IMPL (i, name, memset,
+#if !defined __loongarch_soft_float
+ IFUNC_IMPL_ADD (array, i, memset, SUPPORT_LASX, __memset_lasx)
+ IFUNC_IMPL_ADD (array, i, memset, SUPPORT_LSX, __memset_lsx)
+#endif
+ IFUNC_IMPL_ADD (array, i, memset, SUPPORT_UAL, __memset_unaligned)
+ IFUNC_IMPL_ADD (array, i, memset, 1, __memset_aligned)
+ )
+
return i;
}
diff --git a/sysdeps/loongarch/lp64/multiarch/memset-aligned.S b/sysdeps/loongarch/lp64/multiarch/memset-aligned.S
new file mode 100644
index 00000000..1fce95b7
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/memset-aligned.S
@@ -0,0 +1,174 @@
+/* Optimized memset aligned 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 MEMSET_NAME __memset_aligned
+#else
+# define MEMSET_NAME memset
+#endif
+
+LEAF(MEMSET_NAME, 6)
+ move t0, a0
+ andi a3, a0, 0x7
+ li.w t6, 16
+ beqz a3, L(align)
+ bltu a2, t6, L(short_data)
+
+L(make_align):
+ li.w t8, 8
+ sub.d t2, t8, a3
+ pcaddi t1, 11
+ slli.d t3, t2, 2
+ sub.d t1, t1, t3
+ jr t1
+
+L(al7):
+ st.b a1, t0, 6
+L(al6):
+ st.b a1, t0, 5
+L(al5):
+ st.b a1, t0, 4
+L(al4):
+ st.b a1, t0, 3
+L(al3):
+ st.b a1, t0, 2
+L(al2):
+ st.b a1, t0, 1
+L(al1):
+ st.b a1, t0, 0
+L(al0):
+ add.d t0, t0, t2
+ sub.d a2, a2, t2
+
+L(align):
+ bstrins.d a1, a1, 15, 8
+ bstrins.d a1, a1, 31, 16
+ bstrins.d a1, a1, 63, 32
+ bltu a2, t6, L(less_16bytes)
+
+ andi a4, a2, 0x3f
+ beq a4, a2, L(less_64bytes)
+
+ sub.d t1, a2, a4
+ move a2, a4
+ add.d a5, t0, t1
+
+L(loop_64bytes):
+ addi.d t0, t0, 64
+ st.d a1, t0, -64
+ st.d a1, t0, -56
+ st.d a1, t0, -48
+ st.d a1, t0, -40
+
+ st.d a1, t0, -32
+ st.d a1, t0, -24
+ st.d a1, t0, -16
+ st.d a1, t0, -8
+ bne t0, a5, L(loop_64bytes)
+
+L(less_64bytes):
+ srai.d a4, a2, 5
+ beqz a4, L(less_32bytes)
+ addi.d a2, a2, -32
+ st.d a1, t0, 0
+
+ st.d a1, t0, 8
+ st.d a1, t0, 16
+ st.d a1, t0, 24
+ addi.d t0, t0, 32
+
+L(less_32bytes):
+ bltu a2, t6, L(less_16bytes)
+ addi.d a2, a2, -16
+ st.d a1, t0, 0
+ st.d a1, t0, 8
+ addi.d t0, t0, 16
+
+L(less_16bytes):
+ srai.d a4, a2, 3
+ beqz a4, L(less_8bytes)
+ addi.d a2, a2, -8
+ st.d a1, t0, 0
+ addi.d t0, t0, 8
+
+L(less_8bytes):
+ beqz a2, L(less_1byte)
+ srai.d a4, a2, 2
+ beqz a4, L(less_4bytes)
+ addi.d a2, a2, -4
+ st.w a1, t0, 0
+ addi.d t0, t0, 4
+
+L(less_4bytes):
+ srai.d a3, a2, 1
+ beqz a3, L(less_2bytes)
+ addi.d a2, a2, -2
+ st.h a1, t0, 0
+ addi.d t0, t0, 2
+
+L(less_2bytes):
+ beqz a2, L(less_1byte)
+ st.b a1, t0, 0
+L(less_1byte):
+ jr ra
+
+L(short_data):
+ pcaddi t1, 19
+ slli.d t3, a2, 2
+ sub.d t1, t1, t3
+ jr t1
+L(short_15):
+ st.b a1, a0, 14
+L(short_14):
+ st.b a1, a0, 13
+L(short_13):
+ st.b a1, a0, 12
+L(short_12):
+ st.b a1, a0, 11
+L(short_11):
+ st.b a1, a0, 10
+L(short_10):
+ st.b a1, a0, 9
+L(short_9):
+ st.b a1, a0, 8
+L(short_8):
+ st.b a1, a0, 7
+L(short_7):
+ st.b a1, a0, 6
+L(short_6):
+ st.b a1, a0, 5
+L(short_5):
+ st.b a1, a0, 4
+L(short_4):
+ st.b a1, a0, 3
+L(short_3):
+ st.b a1, a0, 2
+L(short_2):
+ st.b a1, a0, 1
+L(short_1):
+ st.b a1, a0, 0
+L(short_0):
+ jr ra
+END(MEMSET_NAME)
+
+libc_hidden_builtin_def (MEMSET_NAME)
diff --git a/sysdeps/loongarch/lp64/multiarch/memset-lasx.S b/sysdeps/loongarch/lp64/multiarch/memset-lasx.S
new file mode 100644
index 00000000..041abbac
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/memset-lasx.S
@@ -0,0 +1,142 @@
+/* Optimized memset implementation using LoongArch LASX 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
+
+# define MEMSET __memset_lasx
+
+LEAF(MEMSET, 6)
+ li.d t1, 32
+ move a3, a0
+ xvreplgr2vr.b xr0, a1
+ add.d a4, a0, a2
+
+ bgeu t1, a2, L(less_32bytes)
+ li.d t3, 128
+ li.d t2, 64
+ blt t3, a2, L(long_bytes)
+
+L(less_128bytes):
+ bgeu t2, a2, L(less_64bytes)
+ xvst xr0, a3, 0
+ xvst xr0, a3, 32
+ xvst xr0, a4, -32
+
+ xvst xr0, a4, -64
+ jr ra
+L(less_64bytes):
+ xvst xr0, a3, 0
+ xvst xr0, a4, -32
+
+
+ jr ra
+L(less_32bytes):
+ srli.d t0, a2, 4
+ beqz t0, L(less_16bytes)
+ vst vr0, a3, 0
+
+ vst vr0, a4, -16
+ jr ra
+L(less_16bytes):
+ srli.d t0, a2, 3
+ beqz t0, L(less_8bytes)
+
+ vstelm.d vr0, a3, 0, 0
+ vstelm.d vr0, a4, -8, 0
+ jr ra
+L(less_8bytes):
+ srli.d t0, a2, 2
+
+ beqz t0, L(less_4bytes)
+ vstelm.w vr0, a3, 0, 0
+ vstelm.w vr0, a4, -4, 0
+ jr ra
+
+
+L(less_4bytes):
+ srli.d t0, a2, 1
+ beqz t0, L(less_2bytes)
+ vstelm.h vr0, a3, 0, 0
+ vstelm.h vr0, a4, -2, 0
+
+ jr ra
+L(less_2bytes):
+ beqz a2, L(less_1bytes)
+ st.b a1, a3, 0
+L(less_1bytes):
+ jr ra
+
+L(long_bytes):
+ xvst xr0, a3, 0
+ bstrins.d a3, zero, 4, 0
+ addi.d a3, a3, 32
+ sub.d a2, a4, a3
+
+ andi t0, a2, 0xff
+ beq t0, a2, L(long_end)
+ move a2, t0
+ sub.d t0, a4, t0
+
+
+L(loop_256):
+ xvst xr0, a3, 0
+ xvst xr0, a3, 32
+ xvst xr0, a3, 64
+ xvst xr0, a3, 96
+
+ xvst xr0, a3, 128
+ xvst xr0, a3, 160
+ xvst xr0, a3, 192
+ xvst xr0, a3, 224
+
+ addi.d a3, a3, 256
+ bne a3, t0, L(loop_256)
+L(long_end):
+ bltu a2, t3, L(end_less_128)
+ addi.d a2, a2, -128
+
+ xvst xr0, a3, 0
+ xvst xr0, a3, 32
+ xvst xr0, a3, 64
+ xvst xr0, a3, 96
+
+
+ addi.d a3, a3, 128
+L(end_less_128):
+ bltu a2, t2, L(end_less_64)
+ addi.d a2, a2, -64
+ xvst xr0, a3, 0
+
+ xvst xr0, a3, 32
+ addi.d a3, a3, 64
+L(end_less_64):
+ bltu a2, t1, L(end_less_32)
+ xvst xr0, a3, 0
+
+L(end_less_32):
+ xvst xr0, a4, -32
+ jr ra
+END(MEMSET)
+
+libc_hidden_builtin_def (MEMSET)
+#endif
diff --git a/sysdeps/loongarch/lp64/multiarch/memset-lsx.S b/sysdeps/loongarch/lp64/multiarch/memset-lsx.S
new file mode 100644
index 00000000..3d3982aa
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/memset-lsx.S
@@ -0,0 +1,135 @@
+/* Optimized memset implementation using LoongArch LSX 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
+
+# define MEMSET __memset_lsx
+
+LEAF(MEMSET, 6)
+ li.d t1, 16
+ move a3, a0
+ vreplgr2vr.b vr0, a1
+ add.d a4, a0, a2
+
+ bgeu t1, a2, L(less_16bytes)
+ li.d t3, 64
+ li.d t2, 32
+ bgeu a2, t3, L(long_bytes)
+
+L(less_64bytes):
+ bgeu t2, a2, L(less_32bytes)
+ vst vr0, a3, 0
+ vst vr0, a3, 16
+ vst vr0, a4, -32
+
+ vst vr0, a4, -16
+ jr ra
+L(less_32bytes):
+ vst vr0, a3, 0
+ vst vr0, a4, -16
+
+
+ jr ra
+L(less_16bytes):
+ srli.d t0, a2, 3
+ beqz t0, L(less_8bytes)
+ vstelm.d vr0, a3, 0, 0
+
+ vstelm.d vr0, a4, -8, 0
+ jr ra
+L(less_8bytes):
+ srli.d t0, a2, 2
+ beqz t0, L(less_4bytes)
+
+ vstelm.w vr0, a3, 0, 0
+ vstelm.w vr0, a4, -4, 0
+ jr ra
+L(less_4bytes):
+ srli.d t0, a2, 1
+
+ beqz t0, L(less_2bytes)
+ vstelm.h vr0, a3, 0, 0
+ vstelm.h vr0, a4, -2, 0
+ jr ra
+
+
+L(less_2bytes):
+ beqz a2, L(less_1bytes)
+ vstelm.b vr0, a3, 0, 0
+L(less_1bytes):
+ jr ra
+L(long_bytes):
+ vst vr0, a3, 0
+
+ bstrins.d a3, zero, 3, 0
+ addi.d a3, a3, 16
+ sub.d a2, a4, a3
+ andi t0, a2, 0x7f
+
+ beq t0, a2, L(long_end)
+ move a2, t0
+ sub.d t0, a4, t0
+
+L(loop_128):
+ vst vr0, a3, 0
+
+ vst vr0, a3, 16
+ vst vr0, a3, 32
+ vst vr0, a3, 48
+ vst vr0, a3, 64
+
+
+ vst vr0, a3, 80
+ vst vr0, a3, 96
+ vst vr0, a3, 112
+ addi.d a3, a3, 128
+
+ bne a3, t0, L(loop_128)
+L(long_end):
+ bltu a2, t3, L(end_less_64)
+ addi.d a2, a2, -64
+ vst vr0, a3, 0
+
+ vst vr0, a3, 16
+ vst vr0, a3, 32
+ vst vr0, a3, 48
+ addi.d a3, a3, 64
+
+L(end_less_64):
+ bltu a2, t2, L(end_less_32)
+ addi.d a2, a2, -32
+ vst vr0, a3, 0
+ vst vr0, a3, 16
+
+ addi.d a3, a3, 32
+L(end_less_32):
+ bltu a2, t1, L(end_less_16)
+ vst vr0, a3, 0
+
+L(end_less_16):
+ vst vr0, a4, -16
+ jr ra
+END(MEMSET)
+
+libc_hidden_builtin_def (MEMSET)
+#endif
diff --git a/sysdeps/loongarch/lp64/multiarch/memset-unaligned.S b/sysdeps/loongarch/lp64/multiarch/memset-unaligned.S
new file mode 100644
index 00000000..f7d32039
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/memset-unaligned.S
@@ -0,0 +1,162 @@
+/* Optimized memset unaligned 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 MEMSET_NAME __memset_unaligned
+
+#define ST_128(n) \
+ st.d a1, a0, n; \
+ st.d a1, a0, n+8 ; \
+ st.d a1, a0, n+16 ; \
+ st.d a1, a0, n+24 ; \
+ st.d a1, a0, n+32 ; \
+ st.d a1, a0, n+40 ; \
+ st.d a1, a0, n+48 ; \
+ st.d a1, a0, n+56 ; \
+ st.d a1, a0, n+64 ; \
+ st.d a1, a0, n+72 ; \
+ st.d a1, a0, n+80 ; \
+ st.d a1, a0, n+88 ; \
+ st.d a1, a0, n+96 ; \
+ st.d a1, a0, n+104; \
+ st.d a1, a0, n+112; \
+ st.d a1, a0, n+120;
+
+LEAF(MEMSET_NAME, 6)
+ bstrins.d a1, a1, 15, 8
+ add.d t7, a0, a2
+ bstrins.d a1, a1, 31, 16
+ move t0, a0
+
+ bstrins.d a1, a1, 63, 32
+ srai.d t8, a2, 4
+ beqz t8, L(less_16bytes)
+ srai.d t8, a2, 6
+
+ bnez t8, L(more_64bytes)
+ srai.d t8, a2, 5
+ beqz t8, L(less_32bytes)
+
+ st.d a1, a0, 0
+ st.d a1, a0, 8
+ st.d a1, a0, 16
+ st.d a1, a0, 24
+
+ st.d a1, t7, -32
+ st.d a1, t7, -24
+ st.d a1, t7, -16
+ st.d a1, t7, -8
+
+ jr ra
+
+L(less_32bytes):
+ st.d a1, a0, 0
+ st.d a1, a0, 8
+ st.d a1, t7, -16
+ st.d a1, t7, -8
+
+ jr ra
+
+L(less_16bytes):
+ srai.d t8, a2, 3
+ beqz t8, L(less_8bytes)
+ st.d a1, a0, 0
+ st.d a1, t7, -8
+
+ jr ra
+
+L(less_8bytes):
+ srai.d t8, a2, 2
+ beqz t8, L(less_4bytes)
+ st.w a1, a0, 0
+ st.w a1, t7, -4
+
+ jr ra
+
+L(less_4bytes):
+ srai.d t8, a2, 1
+ beqz t8, L(less_2bytes)
+ st.h a1, a0, 0
+ st.h a1, t7, -2
+
+ jr ra
+
+L(less_2bytes):
+ beqz a2, L(less_1bytes)
+ st.b a1, a0, 0
+
+ jr ra
+
+L(less_1bytes):
+ jr ra
+
+L(more_64bytes):
+ srli.d a0, a0, 3
+ slli.d a0, a0, 3
+ addi.d a0, a0, 0x8
+ st.d a1, t0, 0
+
+ sub.d t2, t0, a0
+ add.d a2, t2, a2
+ addi.d a2, a2, -0x80
+ blt a2, zero, L(end_unalign_proc)
+
+L(loop_less):
+ ST_128(0)
+ addi.d a0, a0, 0x80
+ addi.d a2, a2, -0x80
+ bge a2, zero, L(loop_less)
+
+L(end_unalign_proc):
+ addi.d a2, a2, 0x80
+ pcaddi t1, 20
+ andi t5, a2, 0x78
+ srli.d t5, t5, 1
+
+ sub.d t1, t1, t5
+ jr t1
+
+ st.d a1, a0, 112
+ st.d a1, a0, 104
+ st.d a1, a0, 96
+ st.d a1, a0, 88
+ st.d a1, a0, 80
+ st.d a1, a0, 72
+ st.d a1, a0, 64
+ st.d a1, a0, 56
+ st.d a1, a0, 48
+ st.d a1, a0, 40
+ st.d a1, a0, 32
+ st.d a1, a0, 24
+ st.d a1, a0, 16
+ st.d a1, a0, 8
+ st.d a1, a0, 0
+ st.d a1, t7, -8
+
+ move a0, t0
+ jr ra
+END(MEMSET_NAME)
+
+libc_hidden_builtin_def (MEMSET_NAME)
+#endif
diff --git a/sysdeps/loongarch/lp64/multiarch/memset.c b/sysdeps/loongarch/lp64/multiarch/memset.c
new file mode 100644
index 00000000..3ff60d8a
--- /dev/null
+++ b/sysdeps/loongarch/lp64/multiarch/memset.c
@@ -0,0 +1,37 @@
+/* Multiple versions of memset.
+ 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 memset __redirect_memset
+# include <string.h>
+# undef memset
+
+# define SYMBOL_NAME memset
+# include "ifunc-lasx.h"
+
+libc_ifunc_redirected (__redirect_memset, memset,
+ IFUNC_SELECTOR ());
+
+# ifdef SHARED
+__hidden_ver1 (memset, __GI_memset, __redirect_memset)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (memset);
+# endif
+
+#endif
--
2.33.0
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