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Re: libm to-do list addition


On 05/09/2013 04:00 PM, Richard Henderson wrote:
> On 05/09/2013 12:23 PM, Joseph S. Myers wrote:
>>  static const long double c[] = {
>> +/* 113 bits of pi/2 */
>>  #define PI_2_1 c[0]
>> + 0x1.921fb54442d18469898cc51701b8p+0L,
> 
> Putting compile-time constants into static data variables, as is done here, is
> probably self-defeating.  If we use the literals directly, gcc ought to be
> putting them into mergable .rodata sections.  Then common constants like PI/2
> can be shared between math object files.
> 
> Whether this increases the code size for symbol lookup is target-specific.  But
> I would hope that most targets would do well with got- or pc-relative relocations.

Add it to the master todo list? 

With whatever notes you think appropriate.

http://sourceware.org/glibc/wiki/Development_Todo/Master

Cheers,
Carlos.


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