Opened 6 years ago

Closed 6 years ago

#12209 closed Bugs (fixed)

cpp_bin_float: Subtraction of negative infinity from negative number produces negative infinity

Reported by: Michael Shatz Owned by: John Maddock
Milestone: Boost 1.62.0 Component: multiprecision
Version: Boost Development Trunk Severity: Problem
Keywords: Cc:

Description

cpp_bin_float: subtraction of negative infinity from negative number produces negative infinity instead of positive infinity.

Platform: Mingw, gcc 5.3.0, x64. All optimization levels. Library version: newest files from github 1.60.0 also produces wrong result, but there it is nan rather than -inf

Attachments (1)

inf_test.cpp​ (449 bytes ) - added by Michael Shatz 6 years ago.
cpp_bin_float: -42 - -inf => -inf

Download all attachments as: .zip

Change History (2)

by Michael Shatz, 6 years ago

Attachment: inf_test.cpp​ added

cpp_bin_float: -42 - -inf => -inf

comment:1 by John Maddock, 6 years ago

Milestone: To Be Determined → Boost 1.62.0
Resolution: → fixed
Status: new → closed

Many thanks for catching these!

Fixed in ​https://github.com/boostorg/multiprecision/commit/aaeb4d737eea9058d3daeab0f0fc10974fe0970f

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