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Update autoconf archive macros

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This commit is contained in:
Anthony Green
2018-03-18 13:32:03 -04:00
parent 369ef49f71
commit 81d345b2cf
9 changed files with 189 additions and 121 deletions
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26
m4/ax_gcc_x86_cpuid.m4
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@@ -1,17 +1,19 @@
# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_gcc_x86_cpuid.html
# https://www.gnu.org/software/autoconf-archive/ax_gcc_x86_cpuid.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_GCC_X86_CPUID(OP)
# AX_GCC_X86_CPUID_COUNT(OP, COUNT)
#
# DESCRIPTION
#
# On Pentium and later x86 processors, with gcc or a compiler that has a
# compatible syntax for inline assembly instructions, run a small program
# that executes the cpuid instruction with input OP. This can be used to
# detect the CPU type.
# detect the CPU type. AX_GCC_X86_CPUID_COUNT takes an additional COUNT
# parameter that gets passed into register ECX before calling cpuid.
#
# On output, the values of the eax, ebx, ecx, and edx registers are stored
# as hexadecimal strings as "eax:ebx:ecx:edx" in the cache variable
@@ -28,6 +30,7 @@
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2008 Matteo Frigo
# Copyright (c) 2015 Michael Petch <mpetch@capp-sysware.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
@@ -40,7 +43,7 @@
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
# 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
@@ -55,18 +58,25 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 7
#serial 10
AC_DEFUN([AX_GCC_X86_CPUID],
[AX_GCC_X86_CPUID_COUNT($1, 0)
])
AC_DEFUN([AX_GCC_X86_CPUID_COUNT],
[AC_REQUIRE([AC_PROG_CC])
AC_LANG_PUSH([C])
AC_CACHE_CHECK(for x86 cpuid $1 output, ax_cv_gcc_x86_cpuid_$1,
[AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [
int op = $1, eax, ebx, ecx, edx;
int op = $1, level = $2, eax, ebx, ecx, edx;
FILE *f;
__asm__("cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "a" (op));
__asm__ __volatile__ ("xchg %%ebx, %1\n"
"cpuid\n"
"xchg %%ebx, %1\n"
: "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
: "a" (op), "2" (level));
f = fopen("conftest_cpuid", "w"); if (!f) return 1;
fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
fclose(f);