On Wed, 2004-10-27 at 20:17, Michael Fedrowitz wrote:
> On Wed, 2004-10-27 at 12:56 -0400, Steve M. Robbins wrote:
> > The M68k buildd machine fails the test suite (see below for log
> > URL) and it appears that the underlying problem is that the machine
> > doesn't support IEEE-754 floating point.
>
> This might be the old excess precision problem.
>
> > Is there a mechanism (compiler args?) to enable IEEE-754? Or is
> > it not possible on this platform?
>
> Try -ffloat-store.
And/or set the precision yourself: there are definitions in
<fpu_control.h> to change the precision (the same definitions exist on
the x86):
/* precision control */
#define _FPU_EXTENDED 0x00 /* RECOMMENDED */
#define _FPU_DOUBLE 0x80
#define _FPU_SINGLE 0x40 /* DO NOT USE */
/* Type of the control word. */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
/* Macros for accessing the hardware control word. */
#define _FPU_GETCW(cw) __asm__ ("fmove%.l %!, %0" : "=dm" (cw))
#define _FPU_SETCW(cw) __asm__ volatile ("fmove%.l %0, %!" : : "dm" (cw))
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
Kind regards,
Kars.
