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Dynamically detect avx2 capabilities (#877)
* Install scipy via pip rather than system package manager * Dynamically detect AVX2 capability * Simplify build on TravisCI
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Lucas Hosseini
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Jun 28, 2019
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| @@ -0,0 +1,104 @@ | ||
| # ============================================================================ | ||
| # https://www.gnu.org/software/autoconf-archive/ax_gcc_x86_cpu_supports.html | ||
| # ============================================================================ | ||
| # | ||
| # SYNOPSIS | ||
| # | ||
| # AX_GCC_X86_CPU_SUPPORTS(X86-INSTRUCTION-SET, | ||
| # [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND]) | ||
| # | ||
| # DESCRIPTION | ||
| # | ||
| # Checks if the host cpu supports X86-INSTRUCTION-SET. The instruction set | ||
| # that can be tested are "mmx, popcnt, sse, sse2, sse3, sse4.1, sse4.2, | ||
| # sse4a, avx, avx2, avx512f, fma, fma4, bmi, bmi2". If the instruction set | ||
| # is supported by the host cpu, the C preprocessor macro | ||
| # HAVE_XXX_INSTRUCTIONS is set to 1. The XXX is up-cased instruction case | ||
| # with dot replaced by underscore. For example, the test for "sse4.2" | ||
| # would export HAVE_SSE4_2_INSTRUCTIONS=1. This macro requires gcc | ||
| # extended builtin function "__builtin_cpu_init" and | ||
| # "__builtin_cpu_supports" to detect the cpu features. It will error out | ||
| # if the compiler doesn't has these builtins. | ||
| # | ||
| # If the test for the instruction set succeeded, the hook ACTION-IF-FOUND | ||
| # would run. Otherwise the hook ACTION-IF-NOT-FOUND would run if | ||
| # specified. | ||
| # | ||
| # See also AX_CHECK_X86_FEATURES, which checks all the possible | ||
| # instruction set and export the corresponding CFLAGS. | ||
| # | ||
| # LICENSE | ||
| # | ||
| # Copyright (c) 2016 Felix Chern <idryman@gmail.com> | ||
| # | ||
| # This program is free software; you can redistribute it and/or modify it | ||
| # under the terms of the GNU General Public License as published by the | ||
| # Free Software Foundation; either version 2 of the License, or (at your | ||
| # option) any later version. | ||
| # | ||
| # This program 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 General | ||
| # Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License along | ||
| # with this program. If not, see <https://www.gnu.org/licenses/>. | ||
| # | ||
| # As a special exception, the respective Autoconf Macro's copyright owner | ||
| # gives unlimited permission to copy, distribute and modify the configure | ||
| # scripts that are the output of Autoconf when processing the Macro. You | ||
| # need not follow the terms of the GNU General Public License when using | ||
| # or distributing such scripts, even though portions of the text of the | ||
| # Macro appear in them. The GNU General Public License (GPL) does govern | ||
| # all other use of the material that constitutes the Autoconf Macro. | ||
| # | ||
| # This special exception to the GPL applies to versions of the Autoconf | ||
| # Macro released by the Autoconf Archive. When you make and distribute a | ||
| # modified version of the Autoconf Macro, you may extend this special | ||
| # exception to the GPL to apply to your modified version as well. | ||
|
|
||
| #serial 3 | ||
|
|
||
| AC_DEFUN_ONCE([_AX_GCC_X86_CPU_INIT], | ||
| [AC_LANG_PUSH([C]) | ||
| AC_CACHE_CHECK([for gcc __builtin_cpu_init function], | ||
| [ax_cv_gcc_check_x86_cpu_init], | ||
| [AC_RUN_IFELSE( | ||
| [AC_LANG_PROGRAM([#include <stdlib.h>], | ||
| [__builtin_cpu_init ();]) | ||
| ], | ||
| [ax_cv_gcc_check_x86_cpu_init=yes], | ||
| [ax_cv_gcc_check_x86_cpu_init=no])]) | ||
| AS_IF([test "X$ax_cv_gcc_check_x86_cpu_init" = "Xno"], | ||
| [AC_MSG_ERROR([Need GCC to support X86 CPU features tests])]) | ||
| ]) | ||
|
|
||
| AC_DEFUN([AX_GCC_X86_CPU_SUPPORTS], | ||
| [AC_REQUIRE([AC_PROG_CC]) | ||
| AC_REQUIRE([_AX_GCC_X86_CPU_INIT]) | ||
| AC_LANG_PUSH([C]) | ||
| AS_VAR_PUSHDEF([gcc_x86_feature], [AS_TR_SH([ax_cv_gcc_x86_cpu_supports_$1])]) | ||
| AC_CACHE_CHECK([for x86 $1 instruction support], | ||
| [gcc_x86_feature], | ||
| [AC_RUN_IFELSE( | ||
| [AC_LANG_PROGRAM( [#include <stdlib.h> ], | ||
| [ __builtin_cpu_init (); | ||
| if (__builtin_cpu_supports("$1")) | ||
| return 0; | ||
| return 1; | ||
| ])], | ||
| [gcc_x86_feature=yes], | ||
| [gcc_x86_feature=no] | ||
| )] | ||
| ) | ||
| AC_LANG_POP([C]) | ||
| AS_VAR_IF([gcc_x86_feature],[yes], | ||
| [AC_DEFINE( | ||
| AS_TR_CPP([HAVE_$1_INSTRUCTIONS]), | ||
| [1], | ||
| [Define if $1 instructions are supported]) | ||
| $2], | ||
| [$3] | ||
| ) | ||
| AS_VAR_POPDEF([gcc_x86_feature]) | ||
| ]) |
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