[Bug target/101104] test case gcc.c-torture/execute/ieee/cdivchkld.c fails
segher at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Jul 20 22:46:06 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101104
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |segher at gcc dot gnu.org
Component|testsuite |target
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Patrick McGehearty from comment #1)
> I identified the root cause as not fully understanding the IBM native
> format. The gcc internal representation uses KF mode for IBM 128-bit
> floating point.
KFmode is IEEE QP float. IFmode is double-double, "IBM extended double",
a pair of DP float numbers (with some rules, not every pair is valid).
TFmode is one of those.
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