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* [Bug math/18248] New: missing underflow for subnormal inputs in sin/sinh/tan/tanh/atanh/expm1/log1p/exp2
@ 2015-04-10 13:11 nszabolcs at gmail dot com
2015-04-10 16:43 ` [Bug math/18248] " jsm28 at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: nszabolcs at gmail dot com @ 2015-04-10 13:11 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=18248
Bug ID: 18248
Summary: missing underflow for subnormal inputs in
sin/sinh/tan/tanh/atanh/expm1/log1p/exp2
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: nszabolcs at gmail dot com
Created attachment 8238
--> https://sourceware.org/bugzilla/attachment.cgi?id=8238&action=edit
underflow tests
some functions don't raise the underflow flag for subnormal inputs (even though
the result is inexact subnormal)
attach code on x86_64 gives:
sin(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
sin(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
sinl(0x1p-16400L) = 0x0.0002p-16385 = 1.28254e-4937 did not underflow
sinl(-0x1p-16400L) = -0x0.0002p-16385 = -1.28254e-4937 did not underflow
sinh(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
sinh(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
sinhf(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
sinhf(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
sinhl(0x1p-16400L) = 0x0.0002p-16385 = 1.28254e-4937 did not underflow
sinhl(-0x1p-16400L) = -0x0.0002p-16385 = -1.28254e-4937 did not underflow
tan(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
tan(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
tanf(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
tanf(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
tanl(0x1p-16400L) = 0x0.0002p-16385 = 1.28254e-4937 did not underflow
tanl(-0x1p-16400L) = -0x0.0002p-16385 = -1.28254e-4937 did not underflow
tanh(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
tanh(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
tanhf(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
tanhf(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
tanhl(0x1p-16400L) = 0x0.0002p-16385 = 1.28254e-4937 did not underflow
tanhl(-0x1p-16400L) = -0x0.0002p-16385 = -1.28254e-4937 did not underflow
atanh(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
atanh(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
atanhf(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
atanhf(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
atanhl(0x1p-16400L) = 0x0.0002p-16385 = 1.28254e-4937 did not underflow
atanhl(-0x1p-16400L) = -0x0.0002p-16385 = -1.28254e-4937 did not underflow
expm1(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
expm1(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
expm1f(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
expm1f(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
log1p(0x1p-1030) = 0x8p-1033 = 8.69169e-311 did not underflow
log1p(-0x1p-1030) = -0x8p-1033 = -8.69169e-311 did not underflow
log1pf(0x1p-130f) = 0x8p-133 = 7.34684e-40 did not underflow
log1pf(-0x1p-130f) = -0x8p-133 = -7.34684e-40 did not underflow
exp2l(-16382.5) = 0x5.a827999fcef3242p-16385 = 2.37737e-4932 did not underflow
on aarch64 it gives:
sin(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
sin(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
sinf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
sinf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
sinl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
sinl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
sinh(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
sinh(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
sinhf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
sinhf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
sinhl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
sinhl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
tan(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
tan(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
tanf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
tanf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
tanl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
tanl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
tanh(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
tanh(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
tanhf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
tanhf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
tanhl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
tanhl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
atanh(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
atanh(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
atanhf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
atanhf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
atanhl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
atanhl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
expm1(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
expm1(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
expm1f(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
expm1f(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
log1p(0x1p-1030) = 0x1p-1030 = 8.69169e-311 did not underflow
log1p(-0x1p-1030) = -0x1p-1030 = -8.69169e-311 did not underflow
log1pf(0x1p-130f) = 0x1p-130 = 7.34684e-40 did not underflow
log1pf(-0x1p-130f) = -0x1p-130 = -7.34684e-40 did not underflow
log1pl(0x1p-16400L) = 0x0.00004p-16382 = 1.28254e-4937 did not underflow
log1pl(-0x1p-16400L) = -0x0.00004p-16382 = -1.28254e-4937 did not underflow
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* [Bug math/18248] missing underflow for subnormal inputs in sin/sinh/tan/tanh/atanh/expm1/log1p/exp2
2015-04-10 13:11 [Bug math/18248] New: missing underflow for subnormal inputs in sin/sinh/tan/tanh/atanh/expm1/log1p/exp2 nszabolcs at gmail dot com
@ 2015-04-10 16:43 ` jsm28 at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2015-04-10 16:43 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=18248
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Omnibus reports for lots of unrelated functions are unhelpful. This is a
duplicate of 16538 (sin), 16519 (sinh), 16517 (tan), 16520 (tanh), 16352
(atanh), 16353 (expm1), 16339 (log1p), 16521 (exp2).
*** This bug has been marked as a duplicate of bug 16339 ***
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2015-04-10 13:11 [Bug math/18248] New: missing underflow for subnormal inputs in sin/sinh/tan/tanh/atanh/expm1/log1p/exp2 nszabolcs at gmail dot com
2015-04-10 16:43 ` [Bug math/18248] " jsm28 at gcc dot gnu.org
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