Searched hist:160122 (Results 1 - 1 of 1) sorted by relevance
| /freebsd-11.0-release/lib/msun/src/ | ||
| H A D | s_tanh.c | diff 160122 Wed Jul 05 22:59:33 MDT 2006 bde 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). |
Completed in 58 milliseconds