On Jun 1, 2011, at 7:37 AM, Ian Lance Taylor wrote:
>> One problem remains in the libgo testsuite: certain tests have to be
>> compiled with -mieee, otherwise FPE is generated for unordered values.
>> Any suggestions, where -mieee should be placed?
>
> That's an interesting question. I think that ideally we would like
> -mieee to become the default when using gccgo.
If the language spec requires it, then it should go into gcc/go. See
java_post_options:
static bool
java_post_options (const char **pfilename)
{
/* Excess precision other than "fast" requires front-end
support. */
if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
&& TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
sorry ("-fexcess-precision=standard for Java");
flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
so, you could check the setting and reset any flag that should be off or error
out on incompatible flags. I'd like to think we could get more milage out of
making a flag like -mieee be machine independent and then ports could just
check the base flag for validating machine specific flags. Certainly alpha
isn't the only port that has -mieee. There are likely to be very few flags
promoted because of this, ieee being the most obvious example.
