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From: "mlwmohawk at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/101953] New: bug on the default cast operator from double to
 unsigned short
Date: Tue, 17 Aug 2021 22:19:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101953

            Bug ID: 101953
           Summary: bug on the default cast operator from double to
                    unsigned short
           Product: gcc
           Version: 8.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mlwmohawk at gmail dot com
  Target Milestone: ---

markw@snoopy:~$ gcc --version
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
markw@snoopy:~$ ./badpi
-32000 vs -32000

On Raspberry PI:
pi@raspberrypi:~ $ gcc --version
gcc (Raspbian 8.3.0-6+rpi1) 8.3.0
pi@raspberrypi:~ $ ./badpi
0 vs -32000

This is the code:
#include <stdio.h>
#include <stdint.h>
#include <math.h>

int main(int argc, char **argv)
{
    uint32_t foo;
    int bar;
    double val =3D -32000;

    bar =3D ceil(val);
    foo =3D ceil(val);

    printf("%d vs %d\n", foo, bar);
}

gcc -Wall -o badpi badpi.c -lm=