[Bug libstdc++/11706] std::pow(T, int) implementation pessimizes code

["bkoz at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From bkoz at gcc dot gnu dot org  2003-12-05 23:52 -------

Can you provide a patch for this, or give current status? Have you asked Roger
Sayle about this, who seems to be the guru of builtin math functions? There also
are changes to std_cmath.h for pow, see:

2003-11-15  Roger Sayle  <roger@eyesopen.com>

	* include/c_std/std_cmath.h: Don't import C99's float transcendentals
	into the __gnu_cxx::__c99_binding namespace.
	(acos, asin, atan, atan2, ceil, cosh, exp, floor, fmod, frexp,
	ldexp, log, log10, modf, pow, sinh, tan, tanh): Implement using
	GCC's math builtins, i.e. __builtin_foo.
	* libmath/stubs.c (acosf, acosl, asinf, asinl, atanf, atanl,
	ceilf, ceill, floorf, floorl, fmodf, fmodl, frexpf, frexpl,
	ldexpf, ldexpl, modff, modfl): Provide stub implementations.


Can we get this resolved, folks? I think all that needs to be done now is
examine cmath.tcc for inline-ability (ie, is __cmath_power to be inlined now?)
Please let me know how I can help.

best,
benjamin

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11706