[PATCH][libm] Replace global constants with preprocessor defines

[Florian Weimer]

On 12/26/2012 08:45 AM, Siddhesh Poyarekar wrote:

> A lot of constants (including 1.0 and 0.0) are encoded as `struct
> number`.  This adds an extra dereference in the code and hence makes
> it slower.

This might have been done to cut down constant pool references on RISC 
CPUs (ppc64 might qualify).  Hopefully, current GCC can perform this 
optimization where beneficial.

-- 
Florian Weimer / Red Hat Product Security Team