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[Bug math/15899] New: exp2f() is not monotonic
- From: "bagnara at cs dot unipr.it" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 27 Aug 2013 08:28:42 +0000
- Subject: [Bug math/15899] New: exp2f() is not monotonic
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=15899
Bug ID: 15899
Summary: exp2f() is not monotonic
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: bagnara at cs dot unipr.it
exp2f() is almost monotonic. The only "unexpected decreases" are the ones
below:
round-near:
exp2f(-0x1.93c0c2p-10) = 0x1.ff7424p-1 < 0x1.ff7426p-1 = exp2f(-0x1.93c0c4p-10)
round-down:
exp2f(-0x1.ed062ep-10) = 0x1.ff553cp-1 < 0x1.ff553ep-1 = exp2f(-0x1.ed063p-10)
exp2f(-0x1.8c90d4p-10) = 0x1.ff76ap-1 < 0x1.ff76a2p-1 = exp2f(-0x1.8c90d6p-10)
round-up:
exp2f(-0x1.fbda98p-10) = 0x1.ff501cp-1 < 0x1.ff501ep-1 = exp2f(-0x1.fbda9ap-10)
exp2f(-0x1.e2082cp-10) = 0x1.ff590cp-1 < 0x1.ff590ep-1 = exp2f(-0x1.e2082ep-10)
exp2f(-0x1.90fd16p-10) = 0x1.ff751ap-1 < 0x1.ff751cp-1 = exp2f(-0x1.90fd18p-10)
round-zero:
exp2f(-0x1.d4d40ap-10) = 0x1.ff5d9cp-1 < 0x1.ff5d9ep-1 = exp2f(-0x1.d4d40cp-10)
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