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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libquadmath/99202] New: Undefined behaviour in libquadmath file rem_pio2q.c function __quadmath_rem_pio2q
Date: Mon, 22 Feb 2021 15:55:16 +0000 [thread overview]
Message-ID: <bug-99202-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99202
Bug ID: 99202
Summary: Undefined behaviour in libquadmath file rem_pio2q.c
function __quadmath_rem_pio2q
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libquadmath
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
Target Milestone: ---
! from dec_math.f90
! must be compiled and run
! gfortran compiler needs not be sanitized
! must load sanitized libquadmath.so.0 as in ldd a.out -> libquadmath.so.0 =>
/home/vitti/local/gcc-150221-undefined/lib64/libquadmath.so.0
! ../../../gcc-150221/libquadmath/math/rem_pio2q.c:562:26: runtime error: left
shift of 4612846647631955497 by 23 places cannot be represented in type 'long
int'
! rem_pio2q.c:562 -> "tx [2] = (double)(((ix << 23) | (lx >> 41)) & 0xffffff);"
real(16) :: q_i1, q_oa
q_i1 = 34.3774677078493908766176900826395_16
q_oa = cotan (q_i1)
end
next reply other threads:[~2021-02-22 15:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 15:55 zeccav at gmail dot com [this message]
2021-02-23 9:01 ` [Bug libquadmath/99202] " marxin at gcc dot gnu.org
2021-02-23 16:12 ` zeccav at gmail dot com
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