[PATCH][BZ #5768 fix SIGFPE in isnan(0 for SNaN

[Daniel Jacobowitz]

On Mon, Feb 18, 2008 at 05:27:05PM -0600, Steven Munroe wrote:
> The attached patch fixes a problem we found in PPC where GCC4.1+ code
> motion rearranges the inline asm macros for isnan(). GCC moves the
> (x==x) after the original fpscr (with FE_INVALID enabled) is restored.
> If a Signaling NaN is passed we will get a SIGFPE.

Isn't moving a potentially trapping computation across a volatile asm
a gcc bug?

-- 
Daniel Jacobowitz
CodeSourcery