On Mon, Jun 12, 2017 at 09:08:00AM -0700, H.J. Lu wrote: > On Mon, Jun 12, 2017 at 9:06 AM, Koval, Julia <julia.ko...@intel.com> wrote: > > I would like to, but as far as I know the only testcase possible is below, > > and as far as I know there is no possibility to use dg-error for runtime > > exceptions(Sorry, if I'm wrong). There are only 2 versions of the flag > > exception or no exception and the error is, when they are combined in CSE. > > Can you use > > if (wrong) > abort (); > > in testcase?
Where wrong can also be if (__builtin_fabsf (somefloatval - expectedval) < epsilon) or similar if needed. Also, the testcase contains many unnecessary includes, if you use __builtin_abort, I'd hope you only need x86intrin.h and nothing else. And, main can be just int main (), argc and argv aren't used. > > >> -----Original Message----- > >> From: H.J. Lu [mailto:hjl.to...@gmail.com] > >> Sent: Monday, June 12, 2017 3:43 PM > >> To: Koval, Julia <julia.ko...@intel.com> > >> Cc: GCC Patches <gcc-patches@gcc.gnu.org>; Uros Bizjak > >> <ubiz...@gmail.com>; Kirill Yukhin <kirill.yuk...@gmail.com> > >> Subject: Re: [PATCH][X86] Fix rounding pattern similar to PR73350 > >> > >> On Mon, Jun 12, 2017 at 6:21 AM, Koval, Julia <julia.ko...@intel.com> > >> wrote: > >> > This is the same issue as PR73350 and PR80862 for disabling FP > >> > exceptions. > >> > > >> > gcc -O0 -mavx512f -mavx512er returns exception > >> > gcc -O2 -mavx512f -mavx512er returns nan > >> > > >> > For this code: > >> > > >> > #include <stdio.h> > >> > #include <math.h> > >> > #include <x86intrin.h> > >> > #include <limits.h> > >> > #include <float.h> > >> > > >> > int main(int argc, char *argv[]) { > >> > __m512 a = _mm512_set1_ps((float) -1); > >> > __m512 b = _mm512_set1_ps((float) -1); > >> > _mm_setcsr( _MM_MASK_MASK &~ > >> > > >> (_MM_MASK_OVERFLOW|_MM_MASK_INVALID|_MM_MASK_DIV_ZERO) ); > >> > __m512 result1 = _mm512_rsqrt28_round_ps(a, _MM_FROUND_NO_EXC ); > >> > printf("%d %d\n", _MM_FROUND_CUR_DIRECTION, > >> _MM_FROUND_NO_EXC); > >> > __m512 result2 = _mm512_rsqrt28_round_ps(a, > >> _MM_FROUND_CUR_DIRECTION); > >> > > >> > printf("%g\n", result1[0] - result2[0]); > >> > > >> > return 0; > >> > } Jakub
