Fcalva/OpenLibm
1
0
Fork 0
mirror of https://git.planet-casio.com/Lephenixnoir/OpenLibm.git synced 2025-01-01 06:23:39 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

more accurate comment for the x==1.0 hack

Browse source
This commit is contained in:
Jeff Bezanson 2013-12-14 15:49:02 -05:00
parent 9bc257a323
commit 89d232d114
1 changed files with 4 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/e_exp.c
View file

@ -125,8 +125,10 @@ __ieee754_exp(double x) /* default IEEE double exp */
if(x < u_threshold) return twom1000*twom1000; /* underflow */
}
/* by pure bad luck, this implementation's error for x==1.0 is
unusually large, although still within 1 ulp. */
/* this implementation gives 2.7182818284590455 for exp(1.0),
which is well within the allowable error. however,
2.718281828459045 is closer to the true value so we prefer that
answer, given that 1.0 is such an important argument value. */
if (x == 1.0)
return 2.718281828459045235360;