Greetings, and thanks for the feedback!
#include <stdio.h>
typedef union {
float f;
int i;
} U;
static void t(double d) {
printf("%e\n",d);
}
int main() {
U u;
u.i=1;
printf("%he\n",u.f);
t((double)u.f);
return 0;
}
./tt
Good:
1.401298e-45
1.401298e-45
Bad:
2.652495e-315
2.652495e-315
uname -a
Linux alf 2.6.17.11 #2 Wed Aug 30 10:01:12 CEST 2006 alpha GNU/Linux
cc -v
Using built-in specs.
Target: alpha-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu
--enable-libstdcxx-debug --enable-mpfr --enable-checking=release alpha-linux-gnu
Thread model: posix
gcc version 4.1.2 20060901 (prerelease) (Debian 4.1.1-13)
-mieee does not help. In gdb, u.f is the right number, but gets
corrupted on function call.
Take care,
Falk Hueffner <[EMAIL PROTECTED]> writes:
> Camm Maguire <[EMAIL PROTECTED]> writes:
>
> > Casting the smallest denormalized shortfloat to a double in a function
> > argument is destroying the number in the callee. Do you know of a
> > workaround?
>
> What kind of machine is this on? Might also be a kernel bug. Do you
> have a stand-alone testcase?
>
> --
> Falk
>
>
>
--
Camm Maguire [EMAIL PROTECTED]
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