[LLVMbugs] [Bug 7931] New: __floatsidf output is wrong with INT_MIN as input

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7931

           Summary: __floatsidf output is wrong with INT_MIN as input
           Product: compiler-rt
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: quickslyver at free.fr
                CC: llvmbugs at cs.uiuc.edu


$cat test.c
#include <assert.h>
#include <stdio.h>
#include <limits.h>

double __floatsidf(int);
int main()
{
  double b=(double)INT_MIN;
  double a=__floatsidf(INT_MIN);
  printf("a=%f\n",a);
  printf("b=%f\n",b);
  printf("a=%x%x\n",*((int*)&a+1),*(int*)&a);
  printf("b=%x%x\n",*((int*)&b+1),*(int*)&b);
  assert(a==b);
}
---------------------------------
$./a.out
a=-536870912.000000
b=-2147483648.000000
a=c1c000000
b=c1e000000
a.out: test2.c:14: main: Assertion `a==b' failed.
Aborted

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