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authorJoseph Myers <joseph@codesourcery.com>2015-05-14 23:38:07 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-05-14 23:38:07 +0000
commit0b7a5f920163d03806d7c5d9d1c83b16942c9496 (patch)
treea108347db6f5f094bf917214f562b9a3a7ae8b04 /NEWS
parent95b07fbcc702a83b421cb5d0488ba2817d3123c1 (diff)
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Fix log1p missing underflows (bug 16339).
Similar to various other bugs in this area, some log1p implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. (The ldbl-128ibm implementation doesn't currently need any change as it already generates this exception, albeit through code that would generate spurious exceptions in other cases; special code for this issue will only be needed there when fixing the spurious exceptions.) Tested for x86_64, x86, powerpc and mips64. [BZ #16339] * sysdeps/i386/fpu/s_log1p.S (dbl_min): New object. (__log1p): Force underflow exception for results with small absolute value. * sysdeps/i386/fpu/s_log1pf.S (flt_min): New object. (__log1pf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/dbl-64/s_log1p.c: Include <float.h>. (__log1p): Force underflow exception for results with small absolute value. * sysdeps/ieee754/flt-32/s_log1pf.c: Include <float.h>. (__log1pf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128/s_log1pl.c: Include <float.h>. (__log1pl): Force underflow exception for results with small absolute value. * math/auto-libm-test-in: Do not allow missing underflow exceptions from log1p. * math/auto-libm-test-out: Regenerated.
Diffstat (limited to 'NEWS')
-rw-r--r--NEWS2
1 files changed, 1 insertions, 1 deletions
diff --git a/NEWS b/NEWS
index 91027bd83b..a9b0138b3e 100644
--- a/NEWS
+++ b/NEWS
@@ -9,7 +9,7 @@ Version 2.22
* The following bugs are resolved with this release:
- 4719, 6792, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969,
+ 4719, 6792, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969, 16339,
16351, 16512, 16560, 16783, 16850, 17090, 17195, 17269, 17523, 17542,
17569, 17588, 17596, 17620, 17621, 17628, 17631, 17692, 17711, 17715,
17776, 17779, 17792, 17836, 17912, 17916, 17930, 17932, 17944, 17949,