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File _service:tar_scm:LoongArch-Add-ifunc-support-for-strcmp-aligned-lsx.patch of Package glibc
From e258cfcf92f5e31e902fa045b41652f00fcf2521 Mon Sep 17 00:00:00 2001 From: dengjianbo <dengjianbo@loongson.cn> Date: Thu, 24 Aug 2023 16:50:18 +0800 Subject: [PATCH 09/29] LoongArch: Add ifunc support for strcmp{aligned, lsx} Based on the glibc microbenchmark, strcmp-aligned implementation could reduce the runtime 0%-10% for aligned comparison, 10%-20% for unaligned comparison, strcmp-lsx implemenation could reduce the runtime 0%-50%. Signed-off-by: Peng Fan <fanpeng@loongson.cn> Signed-off-by: ticat_fp <fanpeng@loongson.cn> --- sysdeps/loongarch/lp64/multiarch/Makefile | 2 + .../lp64/multiarch/ifunc-impl-list.c | 7 + .../loongarch/lp64/multiarch/ifunc-strcmp.h | 38 ++++ .../loongarch/lp64/multiarch/strcmp-aligned.S | 179 ++++++++++++++++++ sysdeps/loongarch/lp64/multiarch/strcmp-lsx.S | 165 ++++++++++++++++ sysdeps/loongarch/lp64/multiarch/strcmp.c | 35 ++++ 6 files changed, 426 insertions(+) create mode 100644 sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h create mode 100644 sysdeps/loongarch/lp64/multiarch/strcmp-aligned.S create mode 100644 sysdeps/loongarch/lp64/multiarch/strcmp-lsx.S create mode 100644 sysdeps/loongarch/lp64/multiarch/strcmp.c diff --git a/sysdeps/loongarch/lp64/multiarch/Makefile b/sysdeps/loongarch/lp64/multiarch/Makefile index c4dd3143..d5a500de 100644 --- a/sysdeps/loongarch/lp64/multiarch/Makefile +++ b/sysdeps/loongarch/lp64/multiarch/Makefile @@ -12,6 +12,8 @@ sysdep_routines += \ strchrnul-aligned \ strchrnul-lsx \ strchrnul-lasx \ + strcmp-aligned \ + strcmp-lsx \ memcpy-aligned \ memcpy-unaligned \ memmove-unaligned \ diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c index 7cec0b77..9183b7da 100644 --- a/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c +++ b/sysdeps/loongarch/lp64/multiarch/ifunc-impl-list.c @@ -62,6 +62,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, IFUNC_IMPL_ADD (array, i, strchrnul, 1, __strchrnul_aligned) ) + IFUNC_IMPL (i, name, strcmp, +#if !defined __loongarch_soft_float + IFUNC_IMPL_ADD (array, i, strcmp, SUPPORT_LSX, __strcmp_lsx) +#endif + IFUNC_IMPL_ADD (array, i, strcmp, 1, __strcmp_aligned) + ) + IFUNC_IMPL (i, name, memcpy, #if !defined __loongarch_soft_float IFUNC_IMPL_ADD (array, i, memcpy, SUPPORT_LASX, __memcpy_lasx) diff --git a/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h b/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h new file mode 100644 index 00000000..ca26352b --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/ifunc-strcmp.h @@ -0,0 +1,38 @@ +/* Common definition for strcmp ifunc selection. + 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 (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_LSX) + return OPTIMIZE (lsx); + else +#endif + return OPTIMIZE (aligned); +} diff --git a/sysdeps/loongarch/lp64/multiarch/strcmp-aligned.S b/sysdeps/loongarch/lp64/multiarch/strcmp-aligned.S new file mode 100644 index 00000000..f5f4f336 --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/strcmp-aligned.S @@ -0,0 +1,179 @@ +/* Optimized strcmp 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 STRCMP_NAME __strcmp_aligned +#else +# define STRCMP_NAME strcmp +#endif + +LEAF(STRCMP_NAME, 6) + lu12i.w a4, 0x01010 + andi a2, a0, 0x7 + ori a4, a4, 0x101 + andi a3, a1, 0x7 + + bstrins.d a4, a4, 63, 32 + li.d t7, -1 + li.d t8, 8 + slli.d a5, a4, 7 + + bne a2, a3, L(unaligned) + bstrins.d a0, zero, 2, 0 + bstrins.d a1, zero, 2, 0 + ld.d t0, a0, 0 + + ld.d t1, a1, 0 + slli.d t3, a2, 3 + sll.d t2, t7, t3 + orn t0, t0, t2 + + + orn t1, t1, t2 + sub.d t2, t0, a4 + andn t3, a5, t0 + and t2, t2, t3 + + bne t0, t1, L(al_end) +L(al_loop): + bnez t2, L(ret0) + ldx.d t0, a0, t8 + ldx.d t1, a1, t8 + + addi.d t8, t8, 8 + sub.d t2, t0, a4 + andn t3, a5, t0 + and t2, t2, t3 + + beq t0, t1, L(al_loop) +L(al_end): + xor t3, t0, t1 + or t2, t2, t3 + ctz.d t3, t2 + + + bstrins.d t3, zero, 2, 0 + srl.d t0, t0, t3 + srl.d t1, t1, t3 + andi t0, t0, 0xff + + andi t1, t1, 0xff + sub.d a0, t0, t1 + jr ra + nop + +L(ret0): + move a0, zero + jr ra + nop + nop + +L(unaligned): + slt a6, a3, a2 + xor t0, a0, a1 + maskeqz t0, t0, a6 + xor a0, a0, t0 + + + xor a1, a1, t0 + andi a2, a0, 0x7 + andi a3, a1, 0x7 + bstrins.d a0, zero, 2, 0 + + bstrins.d a1, zero, 2, 0 + ld.d t4, a0, 0 + ld.d t1, a1, 0 + slli.d a2, a2, 3 + + slli.d a3, a3, 3 + srl.d t0, t4, a2 + srl.d t1, t1, a3 + srl.d t5, t7, a3 + + orn t0, t0, t5 + orn t1, t1, t5 + bne t0, t1, L(not_equal) + sll.d t5, t7, a2 + + + sub.d a3, a2, a3 + orn t4, t4, t5 + sub.d a2, zero, a3 + sub.d t2, t4, a4 + + andn t3, a5, t4 + and t2, t2, t3 + bnez t2, L(find_zero) +L(un_loop): + srl.d t5, t4, a3 + + ldx.d t4, a0, t8 + ldx.d t1, a1, t8 + addi.d t8, t8, 8 + sll.d t0, t4, a2 + + or t0, t0, t5 + bne t0, t1, L(not_equal) + sub.d t2, t4, a4 + andn t3, a5, t4 + + + and t2, t2, t3 + beqz t2, L(un_loop) +L(find_zero): + sub.d t2, t0, a4 + andn t3, a5, t0 + + and t2, t2, t3 + bnez t2, L(ret0) + ldx.d t1, a1, t8 + srl.d t0, t4, a3 + +L(not_equal): + sub.d t2, t0, a4 + andn t3, a5, t0 + and t2, t2, t3 + xor t3, t0, t1 + + or t2, t2, t3 +L(un_end): + ctz.d t3, t2 + bstrins.d t3, zero, 2, 0 + srl.d t0, t0, t3 + + + srl.d t1, t1, t3 + andi t0, t0, 0xff + andi t1, t1, 0xff + sub.d t2, t0, t1 + + + sub.d t3, t1, t0 + masknez t0, t2, a6 + maskeqz t1, t3, a6 + or a0, t0, t1 + + jr ra +END(STRCMP_NAME) + +libc_hidden_builtin_def (STRCMP_NAME) diff --git a/sysdeps/loongarch/lp64/multiarch/strcmp-lsx.S b/sysdeps/loongarch/lp64/multiarch/strcmp-lsx.S new file mode 100644 index 00000000..2e177a38 --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/strcmp-lsx.S @@ -0,0 +1,165 @@ +/* Optimized strcmp 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 STRCMP __strcmp_lsx + +LEAF(STRCMP, 6) + pcalau12i t0, %pc_hi20(L(INDEX)) + andi a2, a0, 0xf + vld vr2, t0, %pc_lo12(L(INDEX)) + andi a3, a1, 0xf + + bne a2, a3, L(unaligned) + bstrins.d a0, zero, 3, 0 + bstrins.d a1, zero, 3, 0 + vld vr0, a0, 0 + + vld vr1, a1, 0 + vreplgr2vr.b vr3, a2 + vslt.b vr2, vr2, vr3 + vseq.b vr3, vr0, vr1 + + vmin.bu vr3, vr0, vr3 + vor.v vr3, vr3, vr2 + vsetanyeqz.b fcc0, vr3 + bcnez fcc0, L(al_out) + + +L(al_loop): + vld vr0, a0, 16 + vld vr1, a1, 16 + addi.d a0, a0, 16 + addi.d a1, a1, 16 + + vseq.b vr3, vr0, vr1 + vmin.bu vr3, vr0, vr3 + vsetanyeqz.b fcc0, vr3 + bceqz fcc0, L(al_loop) + +L(al_out): + vseqi.b vr3, vr3, 0 + vfrstpi.b vr3, vr3, 0 + vshuf.b vr0, vr0, vr0, vr3 + vshuf.b vr1, vr1, vr1, vr3 + + vpickve2gr.bu t0, vr0, 0 + vpickve2gr.bu t1, vr1, 0 + sub.d a0, t0, t1 + jr ra + + +L(unaligned): + slt a4, a3, a2 + xor t0, a0, a1 + maskeqz t0, t0, a4 + xor a0, a0, t0 + + xor a1, a1, t0 + andi a2, a0, 0xf + andi a3, a1, 0xf + bstrins.d a0, zero, 3, 0 + + bstrins.d a1, zero, 3, 0 + vld vr3, a0, 0 + vld vr1, a1, 0 + vreplgr2vr.b vr4, a2 + + vreplgr2vr.b vr5, a3 + vslt.b vr7, vr2, vr5 + vsub.b vr5, vr5, vr4 + vaddi.bu vr6, vr2, 16 + + + vsub.b vr6, vr6, vr5 + vshuf.b vr0, vr3, vr3, vr6 + vor.v vr0, vr0, vr7 + vor.v vr1, vr1, vr7 + + vseq.b vr5, vr0, vr1 + vsetanyeqz.b fcc0, vr5 + bcnez fcc0, L(not_equal) + vslt.b vr4, vr2, vr4 + + vor.v vr0, vr3, vr4 + vsetanyeqz.b fcc0, vr0 + bcnez fcc0, L(find_zero) + nop + +L(un_loop): + vld vr3, a0, 16 + vld vr1, a1, 16 + addi.d a0, a0, 16 + addi.d a1, a1, 16 + + + vshuf.b vr0, vr3, vr0, vr6 + vseq.b vr5, vr0, vr1 + vsetanyeqz.b fcc0, vr5 + bcnez fcc0, L(not_equal) + + vsetanyeqz.b fcc0, vr3 + vor.v vr0, vr3, vr3 + bceqz fcc0, L(un_loop) +L(find_zero): + vmin.bu vr5, vr1, vr5 + + vsetanyeqz.b fcc0, vr5 + bcnez fcc0, L(ret0) + vld vr1, a1, 16 + vshuf.b vr0, vr3, vr3, vr6 + + vseq.b vr5, vr0, vr1 +L(not_equal): + vmin.bu vr5, vr0, vr5 +L(un_end): + vseqi.b vr5, vr5, 0 + vfrstpi.b vr5, vr5, 0 + + + vshuf.b vr0, vr0, vr0, vr5 + vshuf.b vr1, vr1, vr1, vr5 + vpickve2gr.bu t0, vr0, 0 + vpickve2gr.bu t1, vr1, 0 + + sub.d t3, t0, t1 + sub.d t4, t1, t0 + masknez t0, t3, a4 + maskeqz t1, t4, a4 + + or a0, t0, t1 + jr ra +L(ret0): + move a0, zero + jr ra +END(STRCMP) + + .section .rodata.cst16,"M",@progbits,16 + .align 4 +L(INDEX): + .dword 0x0706050403020100 + .dword 0x0f0e0d0c0b0a0908 + +libc_hidden_builtin_def (STRCMP) +#endif diff --git a/sysdeps/loongarch/lp64/multiarch/strcmp.c b/sysdeps/loongarch/lp64/multiarch/strcmp.c new file mode 100644 index 00000000..6f249c0b --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/strcmp.c @@ -0,0 +1,35 @@ +/* Multiple versions of strcmp. + 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 strcmp __redirect_strcmp +# include <string.h> +# undef strcmp + +# define SYMBOL_NAME strcmp +# include "ifunc-strcmp.h" + +libc_ifunc_redirected (__redirect_strcmp, strcmp, IFUNC_SELECTOR ()); + +# ifdef SHARED +__hidden_ver1 (strcmp, __GI_strcmp, __redirect_strcmp) + __attribute__ ((visibility ("hidden"))) __attribute_copy__ (strcmp); +# endif +#endif -- 2.33.0
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