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cpu instruction spin wait for arm32/64

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David Carlier 2020-04-27 20:28:17 +01:00 committed by David Goldblatt
parent 27f29e424b
commit 33372cbd40
1 changed files with 10 additions and 0 deletions
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10
configure.ac
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@ -416,6 +416,16 @@ case "${host_cpu}" in
fi fi
fi fi
;; ;;
aarch64|arm*)
HAVE_CPU_SPINWAIT=1
AC_CACHE_VAL([je_cv_yield],
[JE_COMPILABLE([yield instruction], [],
[[__asm__ volatile("yield"); return 0;]],
[je_cv_yield])])
if test "x${je_cv_yield}" = "xyes" ; then
CPU_SPINWAIT='__asm__ volatile("yield")'
fi
;;
*) *)
HAVE_CPU_SPINWAIT=0 HAVE_CPU_SPINWAIT=0
;; ;;