On Tue, Apr 12, 2011 at 11:59:29PM +0200, Aurelien Jarno wrote:
> Given that float32_*() functions are IEEE754 compliant, the efscmp*()
> functions are correctly implemented, while efstst*() are not. This
> patch reverse the implementation of this two groups of functions and
> fix the comments. It also use float32_eq() instead of float32_eq_quiet()
> as qNaNs should not be ignored.
Thanks for addressing this; the E500 emulation in QEMU is more like how
we wish the hardware acted, rather than how it actually acts. :)
It's late here, but I think this change:
> -static inline uint32_t efscmplt(uint32_t op1, uint32_t op2)
> +static inline uint32_t efststlt(uint32_t op1, uint32_t op2)
> {
> - /* XXX: TODO: test special values (NaN, infinites, ...) */
> + /* XXX: TODO: ignore special values (NaN, infinites, ...) */
> return efststlt(op1, op2);
> }
is not correct, as you've just turned this into an infinite (inlined!)
loop. You'd want to change the efststlt call into an efscmplt call.
Similarly for efstst{gt,eq}.
-Nathan
