Hi Joseph, On 12/30/22 19:50, Joseph Myers wrote:
On Fri, 30 Dec 2022, Alejandro Colomar via Libc-alpha wrote:I expect to implement these functions in due course for glibc (not GCC, since these are library functions, with the usual requirements for definitions with external linkage, though most would also have inline header implementations based on existing longstanding built-in functions).Is there any builtin for stdc_bit_ceil()? I've tried to search for it, but didn't find it. I came to the conclusion that I need to write the ugly code around __builtin_clz().I don't think there's such a built-in function, so yes, the inline function would need to use __builtin_clz. (Even the stdc_leading_zeros inline functions will need to do more than just call __builtin_clz - they need to check for zero, since the standard functions have a defined result for a zero argument whereas __builtin_clz doesn't.)
Thanks for confirming. That was my guess :| Cheers, Alex
-- <http://www.alejandro-colomar.es/>
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