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Add CPU "pause" intrinsic for MSVC

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rustyx 2016-01-30 13:41:09 +01:00 committed by Jason Evans
parent bc49863fb5
commit 90c7269c05
1 changed files with 16 additions and 6 deletions
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10
configure.ac
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@ -218,6 +218,15 @@ dnl CPU-specific settings.
CPU_SPINWAIT="" CPU_SPINWAIT=""
case "${host_cpu}" in case "${host_cpu}" in
i686|x86_64) i686|x86_64)
if test "x${je_cv_msvc}" = "xyes" ; then
AC_CACHE_VAL([je_cv_pause_msvc],
[JE_COMPILABLE([pause instruction MSVC], [],
[[_mm_pause(); return 0;]],
[je_cv_pause_msvc])])
if test "x${je_cv_pause_msvc}" = "xyes" ; then
CPU_SPINWAIT='_mm_pause()'
fi
else
AC_CACHE_VAL([je_cv_pause], AC_CACHE_VAL([je_cv_pause],
[JE_COMPILABLE([pause instruction], [], [JE_COMPILABLE([pause instruction], [],
[[__asm__ volatile("pause"); return 0;]], [[__asm__ volatile("pause"); return 0;]],
@ -225,6 +234,7 @@ case "${host_cpu}" in
if test "x${je_cv_pause}" = "xyes" ; then if test "x${je_cv_pause}" = "xyes" ; then
CPU_SPINWAIT='__asm__ volatile("pause")' CPU_SPINWAIT='__asm__ volatile("pause")'
fi fi
fi
;; ;;
powerpc) powerpc)
AC_DEFINE_UNQUOTED([HAVE_ALTIVEC], [ ]) AC_DEFINE_UNQUOTED([HAVE_ALTIVEC], [ ])