#10285: Adding support to an ARM processor
----------------------+-----------------------------------------------------
Reporter: Snark | Owner: GeorgSWeber
Type: defect | Status: needs_info
Priority: major | Milestone:
Component: build | Keywords: ARM
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by dimpase):
Replying to [comment:35 Snark]:
> Gasp! I thought I already checked my -lm for correctness, but now I
tried :
>
> jpuydt@hecke:/tmp$ cat test.c
> #include <stdio.h>
> #include <math.h>
>
> int
> main (int argc,
> char* argv[])
> {
> long double x = 6.0;
> printf("tgammal (%.20Lf)=%.20Lf\n", x, tgammal(x));
> return 0;
> }
> jpuydt@hecke:/tmp$ ./test
> tgammal (6.00000000000000000000)=119.99999999999997157829
OK, so this is a libc bug -- well, assuming all the 53 bits of the
fractional part of the IEEE double should be correct in this case
(long double is the same as double on ARM, afaik). And we get only 34 bits
right.
Something to report upstream. Which version of libc do you run?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10285#comment:36>
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