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re PR target/66326 (Floating point exception with -mfpmath=387 and -fcilkplus.)

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libcilkrts/

2015-11-09  Igor Zamyatin  <igor.zamyatin@intel.com>

	PR target/66326
	* runtime/config/x86/os-unix-sysdep.c (sysdep_save_fp_ctrl_state):
	Use fnstcw instead fnstsw.


gcc/testsuite

2015-11-09  Igor Zamyatin  <igor.zamyatin@intel.com>

	PR target/66326
	* g++.dg/cilk-plus/CK/pr66326.cc: New test.

From-SVN: r230008
This commit is contained in:
Igor Zamyatin 2015-11-09 10:12:34 +00:00 • committed by Ilya Enkovich
parent 00402c9415
commit a42062b176
4 changed files with 45 additions and 1 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-11-09 Igor Zamyatin <igor.zamyatin@intel.com>
PR target/66326
* g++.dg/cilk-plus/CK/pr66326.cc: New test.
2015-11-09 Richard Henderson <rth@redhat.com>
* gcc.target/i386/addr-space-1.c: New test.

33
gcc/testsuite/g++.dg/cilk-plus/CK/pr66326.cc Normal file
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@ -0,0 +1,33 @@
/* { dg-options "-fcilkplus" } */
/* { dg-do run { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-fcilkplus -lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
#include <cilk/cilk.h>
#include <vector>
#include <random>
template <class T>
void do_not_optimize_away(T&& x) {
asm volatile("" : "+r"(x));
}
const int N = 1'000'000;
auto compute() {
std::vector<double> v(N);
auto rng = std::mt19937{std::random_device{}()};
std::uniform_real_distribution<double> dist(0, 1);
for (int i = 0; i < N; ++i) v[i] = std::log(std::sqrt(dist(rng)));
return v;
}
int main() {
std::vector<double> v1, v2, v3;
cilk_spawn [&] { v1 = compute(); }();
cilk_spawn [&] { v2 = compute(); }();
v3 = compute();
do_not_optimize_away(v1.data());
do_not_optimize_away(v2.data());
do_not_optimize_away(v3.data());
return 0;
}

6
libcilkrts/ChangeLog
View file

@ -1,3 +1,9 @@
2015-11-09 Igor Zamyatin <igor.zamyatin@intel.com>
PR target/66326
* runtime/config/x86/os-unix-sysdep.c (sysdep_save_fp_ctrl_state):
Use fnstcw instead fnstsw.
2015-05-13 Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>
* Makefile.in: Regenerated with automake-1.11.6.

2
libcilkrts/runtime/config/x86/os-unix-sysdep.c
View file

@ -135,7 +135,7 @@ void sysdep_save_fp_ctrl_state(__cilkrts_stack_frame *sf)
{
__asm__ ("stmxcsr %0" : "=m" (sf->mxcsr));
}
__asm__ ("fnstsw %0" : "=m" (sf->fpcsr));
__asm__ ("fnstcw %0" : "=m" (sf->fpcsr));
}
#endif
}