mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
x86: Add defines / utilities for making ISA specific x86 builds
1. Factor out some of the ISA level defines in isa-level.c to
standalone header isa-level.h
2. Add new headers with ISA level dependent macros for handling
ifuncs.
Note, this file does not change any code.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
This commit is contained in:
Noah Goldstein
parent
464d189b96
commit
703f434108
@ -19,7 +19,9 @@
|
||||
#include <ifunc-init.h>
|
||||
#include <isa.h>
|
||||
|
||||
#ifndef __x86_64__
|
||||
#ifdef __x86_64__
|
||||
# include <isa-ifunc-macros.h>
|
||||
#else
|
||||
/* Due to the reordering and the other nifty extensions in i686, it is
|
||||
not really good to use heavily i586 optimized code on an i686. It's
|
||||
better to use i486 code if it isn't an i586. */
|
||||
|
||||
70
sysdeps/x86/isa-ifunc-macros.h
Normal file
70
sysdeps/x86/isa-ifunc-macros.h
Normal file
@ -0,0 +1,70 @@
|
||||
/* Common ifunc selection utils
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 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/>. */
|
||||
|
||||
#ifndef _ISA_IFUNC_MACROS_H
|
||||
#define _ISA_IFUNC_MACROS_H 1
|
||||
|
||||
#include <isa-level.h>
|
||||
#include <sys/cdefs.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
/* Only include at the level of the minimum build ISA or higher. I.e
|
||||
if built with ISA=V1, then include all implementations. On the
|
||||
other hand if built with ISA=V3 only include V3/V4
|
||||
implementations. If there is no implementation at or above the
|
||||
minimum build ISA level, then include the highest ISA level
|
||||
implementation. */
|
||||
#if MINIMUM_X86_ISA_LEVEL <= 4
|
||||
# define X86_IFUNC_IMPL_ADD_V4(...) IFUNC_IMPL_ADD (__VA_ARGS__)
|
||||
#endif
|
||||
#if MINIMUM_X86_ISA_LEVEL <= 3
|
||||
# define X86_IFUNC_IMPL_ADD_V3(...) IFUNC_IMPL_ADD (__VA_ARGS__)
|
||||
#endif
|
||||
#if MINIMUM_X86_ISA_LEVEL <= 2
|
||||
# define X86_IFUNC_IMPL_ADD_V2(...) IFUNC_IMPL_ADD (__VA_ARGS__)
|
||||
#endif
|
||||
#if MINIMUM_X86_ISA_LEVEL <= 1
|
||||
# define X86_IFUNC_IMPL_ADD_V1(...) IFUNC_IMPL_ADD (__VA_ARGS__)
|
||||
#endif
|
||||
|
||||
#ifndef X86_IFUNC_IMPL_ADD_V4
|
||||
# define X86_IFUNC_IMPL_ADD_V4(...)
|
||||
#endif
|
||||
#ifndef X86_IFUNC_IMPL_ADD_V3
|
||||
# define X86_IFUNC_IMPL_ADD_V3(...)
|
||||
#endif
|
||||
#ifndef X86_IFUNC_IMPL_ADD_V2
|
||||
# define X86_IFUNC_IMPL_ADD_V2(...)
|
||||
#endif
|
||||
#ifndef X86_IFUNC_IMPL_ADD_V1
|
||||
# define X86_IFUNC_IMPL_ADD_V1(...)
|
||||
#endif
|
||||
|
||||
#define X86_ISA_CPU_FEATURE_CONST_CHECK_ENABLED(name) \
|
||||
((name##_X86_ISA_LEVEL) <= MINIMUM_X86_ISA_LEVEL)
|
||||
|
||||
#define X86_ISA_CPU_FEATURE_USABLE_P(ptr, name) \
|
||||
(X86_ISA_CPU_FEATURE_CONST_CHECK_ENABLED (name) \
|
||||
|| CPU_FEATURE_USABLE_P (ptr, name))
|
||||
|
||||
#define X86_ISA_CPU_FEATURES_ARCH_P(ptr, name) \
|
||||
(X86_ISA_CPU_FEATURE_CONST_CHECK_ENABLED (name) \
|
||||
|| CPU_FEATURES_ARCH_P (ptr, name))
|
||||
|
||||
#endif
|
||||
@ -26,38 +26,31 @@
|
||||
<https://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <elf.h>
|
||||
|
||||
#include <sysdeps/x86/isa-level.h>
|
||||
/* ELF program property for x86 ISA level. */
|
||||
#ifdef INCLUDE_X86_ISA_LEVEL
|
||||
# if defined __SSE__ && defined __SSE2__
|
||||
# if MINIMUM_X86_ISA_LEVEL >= 1
|
||||
/* NB: ISAs, excluding MMX, in x86-64 ISA level baseline are used. */
|
||||
# define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE
|
||||
# else
|
||||
# define ISA_BASELINE 0
|
||||
# endif
|
||||
|
||||
# if ISA_BASELINE && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \
|
||||
&& defined HAVE_X86_LAHF_SAHF && defined __POPCNT__ \
|
||||
&& defined __SSE3__ && defined __SSSE3__ && defined __SSE4_1__ \
|
||||
&& defined __SSE4_2__
|
||||
# if MINIMUM_X86_ISA_LEVEL >= 2
|
||||
/* NB: ISAs in x86-64 ISA level v2 are used. */
|
||||
# define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2
|
||||
# else
|
||||
# define ISA_V2 0
|
||||
# endif
|
||||
|
||||
# if ISA_V2 && defined __AVX__ && defined __AVX2__ && defined __F16C__ \
|
||||
&& defined __FMA__ && defined __LZCNT__ && defined HAVE_X86_MOVBE \
|
||||
&& defined __BMI__ && defined __BMI2__
|
||||
# if MINIMUM_X86_ISA_LEVEL >= 3
|
||||
/* NB: ISAs in x86-64 ISA level v3 are used. */
|
||||
# define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3
|
||||
# else
|
||||
# define ISA_V3 0
|
||||
# endif
|
||||
|
||||
# if ISA_V3 && defined __AVX512F__ && defined __AVX512BW__ \
|
||||
&& defined __AVX512CD__ && defined __AVX512DQ__ \
|
||||
&& defined __AVX512VL__
|
||||
# if MINIMUM_X86_ISA_LEVEL >= 4
|
||||
/* NB: ISAs in x86-64 ISA level v4 are used. */
|
||||
# define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4
|
||||
# else
|
||||
|
||||
102
sysdeps/x86/isa-level.h
Normal file
102
sysdeps/x86/isa-level.h
Normal file
@ -0,0 +1,102 @@
|
||||
/* Header defining the minimum x86 ISA level
|
||||
Copyright (C) 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.
|
||||
|
||||
In addition to the permissions in the GNU Lesser General Public
|
||||
License, the Free Software Foundation gives you unlimited
|
||||
permission to link the compiled version of this file with other
|
||||
programs, and to distribute those programs without any restriction
|
||||
coming from the use of this file. (The Lesser General Public
|
||||
License restrictions do apply in other respects; for example, they
|
||||
cover modification of the file, and distribution when not linked
|
||||
into another program.)
|
||||
|
||||
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 _ISA_LEVEL_H
|
||||
#define _ISA_LEVEL_H
|
||||
|
||||
#if defined __SSE__ && defined __SSE2__
|
||||
/* NB: ISAs, excluding MMX, in x86-64 ISA level baseline are used. */
|
||||
# define __X86_ISA_V1 1
|
||||
#else
|
||||
# define __X86_ISA_V1 0
|
||||
#endif
|
||||
|
||||
#if __X86_ISA_V1 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \
|
||||
&& defined HAVE_X86_LAHF_SAHF && defined __POPCNT__ && defined __SSE3__ \
|
||||
&& defined __SSSE3__ && defined __SSE4_1__ && defined __SSE4_2__
|
||||
/* NB: ISAs in x86-64 ISA level v2 are used. */
|
||||
# define __X86_ISA_V2 1
|
||||
#else
|
||||
# define __X86_ISA_V2 0
|
||||
#endif
|
||||
|
||||
#if __X86_ISA_V2 && defined __AVX__ && defined __AVX2__ && defined __F16C__ \
|
||||
&& defined __FMA__ && defined __LZCNT__ && defined HAVE_X86_MOVBE \
|
||||
&& defined __BMI__ && defined __BMI2__
|
||||
/* NB: ISAs in x86-64 ISA level v3 are used. */
|
||||
# define __X86_ISA_V3 1
|
||||
#else
|
||||
# define __X86_ISA_V3 0
|
||||
#endif
|
||||
|
||||
#if __X86_ISA_V3 && defined __AVX512F__ && defined __AVX512BW__ \
|
||||
&& defined __AVX512CD__ && defined __AVX512DQ__ && defined __AVX512VL__
|
||||
/* NB: ISAs in x86-64 ISA level v4 are used. */
|
||||
# define __X86_ISA_V4 1
|
||||
#else
|
||||
# define __X86_ISA_V4 0
|
||||
#endif
|
||||
|
||||
#define MINIMUM_X86_ISA_LEVEL \
|
||||
(__X86_ISA_V1 + __X86_ISA_V2 + __X86_ISA_V3 + __X86_ISA_V4)
|
||||
|
||||
|
||||
/*
|
||||
* CPU Features that are hard coded as enabled depending on ISA build
|
||||
* level.
|
||||
* - Values > 0 features are always ENABLED if:
|
||||
* Value >= MINIMUM_X86_ISA_LEVEL
|
||||
*/
|
||||
|
||||
|
||||
/* ISA level >= 4 guaranteed includes. */
|
||||
#define AVX512VL_X86_ISA_LEVEL 4
|
||||
#define AVX512BW_X86_ISA_LEVEL 4
|
||||
|
||||
/* ISA level >= 3 guaranteed includes. */
|
||||
#define AVX2_X86_ISA_LEVEL 3
|
||||
#define BMI2_X86_ISA_LEVEL 3
|
||||
|
||||
/*
|
||||
* NB: This may not be fully assumable for ISA level >= 3. From
|
||||
* looking over the architectures supported in cpu-features.h the
|
||||
* following CPUs may have an issue with this being default set:
|
||||
* - AMD Excavator
|
||||
*/
|
||||
#define AVX_Fast_Unaligned_Load_X86_ISA_LEVEL 3
|
||||
|
||||
/*
|
||||
* KNL (the only cpu that sets this supported in cpu-features.h)
|
||||
* builds with ISA V1 so this shouldn't harm any architectures.
|
||||
*/
|
||||
#define Prefer_No_VZEROUPPER_X86_ISA_LEVEL 3
|
||||
|
||||
#define ISA_SHOULD_BUILD(isa_build_level) \
|
||||
(MINIMUM_X86_ISA_LEVEL <= (isa_build_level) && IS_IN (libc)) \
|
||||
|| defined ISA_DEFAULT_IMPL
|
||||
|
||||
#endif
|
||||
49
sysdeps/x86_64/isa-default-impl.h
Normal file
49
sysdeps/x86_64/isa-default-impl.h
Normal file
@ -0,0 +1,49 @@
|
||||
/* Utility for including proper default function based on ISA level
|
||||
Copyright (C) 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 <isa-level.h>
|
||||
|
||||
#ifndef DEFAULT_IMPL_V1
|
||||
# error "Must have at least ISA V1 Version"
|
||||
#endif
|
||||
|
||||
#ifndef DEFAULT_IMPL_V2
|
||||
# define DEFAULT_IMPL_V2 DEFAULT_IMPL_V1
|
||||
#endif
|
||||
|
||||
#ifndef DEFAULT_IMPL_V3
|
||||
# define DEFAULT_IMPL_V3 DEFAULT_IMPL_V2
|
||||
#endif
|
||||
|
||||
#ifndef DEFAULT_IMPL_V4
|
||||
# define DEFAULT_IMPL_V4 DEFAULT_IMPL_V3
|
||||
#endif
|
||||
|
||||
#if MINIMUM_X86_ISA_LEVEL == 1
|
||||
# define ISA_DEFAULT_IMPL DEFAULT_IMPL_V1
|
||||
#elif MINIMUM_X86_ISA_LEVEL == 2
|
||||
# define ISA_DEFAULT_IMPL DEFAULT_IMPL_V2
|
||||
#elif MINIMUM_X86_ISA_LEVEL == 3
|
||||
# define ISA_DEFAULT_IMPL DEFAULT_IMPL_V3
|
||||
#elif MINIMUM_X86_ISA_LEVEL == 4
|
||||
# define ISA_DEFAULT_IMPL DEFAULT_IMPL_V4
|
||||
#else
|
||||
# error "Unsupported ISA Level!"
|
||||
#endif
|
||||
|
||||
#include ISA_DEFAULT_IMPL
|
||||
Loading…
Reference in New Issue
Block a user