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Main changes to CompCert outside of Flocq are as follows:
- Minimal supported version of Coq is now 8.7, due to Flocq requirements.
- Most modifications are due to Z2R being dropped in favor of IZR and to
the way Flocq now handles NaNs.
- CompCert now correctly handles NaNs for the Risc-V architecture
(hopefully).
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We were previously at 2.5.2. Quoting the NEWS from upstream:
Version 2.6.1:
- ensured compatibility from Coq 8.4 to 8.8
Version 2.6.0:
- ensured compatibility from Coq 8.4 to 8.7
- removed some hypotheses on some lemmas of Fcore_ulp
- added lemmas to Fprop_plus_error
- improved examples
Also: in preparation for Coq 8.8, silence warning "compatibility-notation"
when building Flocq, because this warning is on by default in 8.8,
and Flocq triggers it a lot.
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This commit is mainly a squash of the relevant compatibility commits from
Flocq's master. Most of the changes are meant to make the proofs oblivious
to the way constants such as 0, 1, 2, and -1 are represented.
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Note: this version of Flocq is compatible with both Coq 8.4 and 8.5.
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More precise modeling of NaNs.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2303 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1939 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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