45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
AC_DEFUN_ONCE([_AX_GCC_X86_CPU_INIT],
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[AC_LANG_PUSH([C])
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AC_CACHE_CHECK([for gcc __builtin_cpu_init function],
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[ax_cv_gcc_check_x86_cpu_init],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([#include <stdlib.h>],
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[__builtin_cpu_init ();])
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],
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[ax_cv_gcc_check_x86_cpu_init=yes],
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[ax_cv_gcc_check_x86_cpu_init=no])])
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AC_LANG_POP([C])
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AS_IF([test "X$ax_cv_gcc_check_x86_cpu_init" = "Xno"],
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[AC_MSG_ERROR([Need GCC to support X86 CPU features tests])])
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])
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AC_DEFUN([AX_GCC_X86_CPU_SUPPORTS],
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[AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([_AX_GCC_X86_CPU_INIT])
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AC_LANG_PUSH([C])
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AS_VAR_PUSHDEF([gcc_x86_feature], [AS_TR_SH([ax_cv_gcc_x86_cpu_supports_$1])])
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AC_CACHE_CHECK([for x86 $1 instruction support],
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[gcc_x86_feature],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM( [#include <stdlib.h> ],
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[ __builtin_cpu_init ();
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if (__builtin_cpu_supports("$1"))
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return 0;
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return 1;
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])],
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[gcc_x86_feature=yes],
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[gcc_x86_feature=no]
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)]
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)
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AC_LANG_POP([C])
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AS_VAR_IF([gcc_x86_feature],[yes],
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[AC_DEFINE(
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AS_TR_CPP([HAVE_$1_INSTRUCTIONS]),
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[1],
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[Define if $1 instructions are supported])
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$2],
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[$3]
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)
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AS_VAR_POPDEF([gcc_x86_feature])
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])
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