phil@DECWRL.DEC.COM (Phil Hochstetler) (07/14/89)
Version of GNU CC: gcc version 1.35
Input file:
#ifdef COMMENT
In GNU C on Symmetry, converting an unsigned quantity to a float/double, if
the high bit in that quantity is set, causes a floating exception.
#endif
main()
{
unsigned t;
double x;
t = 2400000000;
x = t;
printf("%f\n",x);
}
Compiled via: gcc -o foo foo.c
tm.h and md file: md -> config/i386.md
tm.h -> config/tm-seq386.h
type of machine: Sequent SYMMETRY
OS name and version: DYNIX(R) V3.0.15
Bad behavior: Running compiled program gets a
floating point exception.phil@DECWRL.DEC.COM (Phil Hochstetler) (07/14/89)
Version of GNU CC: gcc version 1.35
Input file:
#ifdef COMMENT
When GNU C compiles the following program on the Symmetry, the resulting
executable core dumps in the printf:
According to the originator of this bug (which has since been fixed on
PCC and ATS CC) the incorrect code is generated since "the trunc instruction
connot convert a number greater than the signed maximum." (At least that's
what it happened on those two compilers.
#endif
/* 04521.c - make sure that this program doesn't bomb on the printf
* dmose 7/13/89
*/
#include <stdio.h>
main()
{
double d;
unsigned bogus = 1;
d = ((double) bogus);
printf("%e\n", d); /*works*/
fflush();
printf("%e\n", ((double) bogus)); /*core dumps in printf*/
}
Compiled via: gcc -o foo foo.c
tm.h and md file: md -> config/i386.md
tm.h -> config/tm-seq386.h
type of machine: Sequent SYMMETRY
OS name and version: DYNIX(R) V3.0.15
Bad behavior: Running compiled program gets a
floating point exception in printf.