Hi Kelvin,
On Fri, Apr 28, 2017 at 11:48:03AM -0600, Kelvin Nilsen wrote:
> --- gcc/config/rs6000/rs6000.h (revision 247069)
> +++ gcc/config/rs6000/rs6000.h (working copy)
> @@ -2717,6 +2717,7 @@ extern int frame_pointer_needed;
> aren't in target_flags. */
> #define RS6000_BTM_ALWAYS 0 /* Always enabled. */
> #define RS6000_BTM_ALTIVEC MASK_ALTIVEC /* VMX/altivec vectors. */
> +#define RS6000_BTM_CMPB MASK_CMPB /* ISA 2.05: cmopare
> bytes. */
Typo ("compare"). And line too long?
> --- gcc/doc/extend.texi (revision 247069)
> +++ gcc/doc/extend.texi (working copy)
> @@ -15107,6 +15107,22 @@ Similar to @code{__builtin_nans}, except the retur
> @end table
>
> The following built-in functions are available for the PowerPC family
> +of processors, starting with ISA 2.05 or later (@option{-mcpu=power6}
> +or @option{-mcmpb}):
> +@smallexample
> +long long __builtin_cmpb (long long, long long);
> +int __builtin_cmpb_32 (int, int);
> +@end smallexample
Is __builtin_cmpb_32 required by the ABI? If not, why do we need it,
can't __builtin_cmpb simply do the SI version if its arguments do not
need bigger?
[ We talked about this elsewhere, but for the record :-) ].
Segher
