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If a small number or zero is passed in, fp64_exp could be very
negative (-1000 for example). The intent of the line is to evaluate to
zero in these cases, but what it actually did was bitshift right by
1000, which is undefined behavior (according to ubsan) that so happens
to result in 0 on GCC/most architectures. This commit changes the code
to check for cases where the bitshift is larger than the width of the
integer.
Change-Id: I8de4bd8ad170f0321d54689460de449b7f8fb60a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21859
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
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This patch updates fputils to the latest revision (0721843) from the
upstream repository (github.com/andysan/fputils). This effectively
only updates the license of the library to match gem5's 3-clause BSD
license.
Change-Id: I46d8a5dfac2f4a95e66ee82a15288ac424d7df90
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/22125
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
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This patch updates fputils to the latest revision (6a47fd8358) from
the upstream repository (github.com/andysan/fputils). Most notably,
this includes changes that export a limited set of 64-bit float
manipulation and avoids a warning about unused 64-bit floats in clang.
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This changeset updates the external library to git revision
52b6190b4e. This update includes changes that fix compilation errors
on old gcc versions and fixes to test a case that affect ICC.
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This changeset includes libfputils from revision bbf0d61d75. This
library can be used to convert to and from 80-bit floats and query the
type of an 80-bit float, which is needed to support the x87 FPU.
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