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From: "dpozar at ecs dot umass.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/98201] CSQRT function gives bad resuts at runtime
Date: Tue, 08 Dec 2020 20:46:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98201

--- Comment #11 from dpozar at ecs dot umass.edu ---
Thomas,

that looks good. But I am not sure how to proceed ...

dave
________________________________
From: tkoenig at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
Sent: Tuesday, December 8, 2020 2:27 PM
To: David Pozar <dpozar@ecs.umass.edu>
Subject: [Bug fortran/98201] CSQRT function gives bad resuts at runtime

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98201

--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I don't have a working mingw system myself, but I dusted off my cygwin
system for this, using their cross-compiler to mingw.

With

$ x86_64-w64-mingw32-gfortran.exe -static -static-libgfortran csqrt.f90

this gave

          Argument                SquareRoot               SR squared
(-.1000E+02  0.1000E+00)   (0.1581E-01  0.3162E+01)   (-.1000E+02  0.1000E+=
00)
(-.1000E+03  0.1000E+00)   (0.5000E-02  0.1000E+02)   (-.1000E+03  0.1000E+=
00)
(-.1000E+04  0.1000E+00)   (0.1581E-02  0.3162E+02)   (-.1000E+04  0.1000E+=
00)
(-.1000E+05  0.1000E+00)   (0.5000E-03  0.1000E+03)   (-.1000E+05  0.1000E+=
00)
(-.1000E+06  0.1000E+00)   (0.1581E-03  0.3162E+03)   (-.1000E+06  0.1000E+=
00)
(-.1000E+07  0.1000E+00)   (0.5000E-04  0.1000E+04)   (-.1000E+07  0.1000E+=
00)
(-.1000E+08  0.1000E+00)   (0.1581E-04  0.3162E+04)   (-.1000E+08  0.1000E+=
00)
(-.1000E+09  0.1000E+00)   (0.5000E-05  0.1000E+05)   (-.1000E+09  0.1000E+=
00)
(-.1000E+10  0.1000E+00)   (0.1581E-05  0.3162E+05)   (-.1000E+10  0.1000E+=
00)

which is OK (I tried the program both from the cygwin command line and
the cmd prompt).

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