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[Bug math/15359] New: Inaccurate cos for IBM long double
- From: "schwab at linux-m68k dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 11 Apr 2013 17:43:10 +0000
- Subject: [Bug math/15359] New: Inaccurate cos for IBM long double
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15359
Bug #: 15359
Summary: Inaccurate cos for IBM long double
Product: glibc
Version: 2.18
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: schwab@linux-m68k.org
Classification: Unclassified
Host: powerpc*-*-*
Failure: Test: cos (pi/2) == 1.082856673921913968223746169860580e-32
Result:
is: 1.08285667392191396822e-32 0x1.c1cd129024e088a67cc7p-107
should be: 1.08285667392191396822e-32 0x1.c1cd129024e088a67cc7p-107
difference: 5.71253355584909492648e-62 0x1.78000000000000000000p-204
ulp : 376.0000
max.ulp : 0.0000
Maximal error of `cos'
is : 376 ulp
accepted: 1 ulp
Failure: Test: sincos (pi/2, &sin_res, &cos_res) puts
1.082856673921913968223746169860580e-32 in cos_res
Result:
is: 1.08285667392191396822e-32 0x1.c1cd129024e088a67cc7p-107
should be: 1.08285667392191396822e-32 0x1.c1cd129024e088a67cc7p-107
difference: 5.71253355584909492648e-62 0x1.78000000000000000000p-204
ulp : 376.0000
max.ulp : 0.0000
Maximal error of `sincos'
is : 376 ulp
accepted: 1 ulp
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