Bruce Evans fe72622ebe Fixed tanh(-0.0) on ia64 and optimizeed tanh(x) for 2**-55 <= |x| < ... 2**-28 as a side effect, by merging with the float precision version of tanh() and the double precision version of sinh(). For tiny x, tanh(x) ~= x, and we used the expression x*(one+x) to return this value (x) and set the inexact flag iff x != 0. This doesn't work on ia64 since gcc -O does the dubious optimization x*(one+x) = x+x*x so as to use fma, so the sign of -0.0 was lost. Instead, handle tiny x in the same as sinh(), although this is imperfect: - return x directly and set the inexact flag in a less efficient way. - increased the threshold for non-tinyness from 2**-55 to 2**-28 so that many more cases are optimized than are pessimized. Updated some comments and fixed bugs in others (ranges for half-open intervals mostly had the open end backwards, and there were nearby style bugs).		2006-07-05 22:59:33 +00:00
..
alpha	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
amd64	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
arm	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
bsdsrc	Removed an unused declaration which was so old that it wasn't a prototype	2005-11-18 05:03:12 +00:00
i387	Removed the optimized asm versions of scalb() and scalbf(). These	2006-07-05 20:06:42 +00:00
ia64	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
man	s/5.5/6.0/ in HISTORY section.	2005-11-24 09:25:10 +00:00
powerpc	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
sparc64	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
src	Fixed tanh(-0.0) on ia64 and optimizeed tanh(x) for 2**-55 <= |x| <	2006-07-05 22:59:33 +00:00
Makefile	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00
Symbol.map	Add symbol versioning to libm.	2006-03-27 23:59:45 +00:00