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Add headers to a few files which were missing them.
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* Fix the implementations and add tests
* Change shift from int63 to Z (was always used as a Z)
* Update FloatLemmas.v accordingly
Co-authored-by: Erik Martin-Dorel <erik.martin-dorel@irit.fr>
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Flag -fexcess-precision=standard is not enough on x86_32
where -msse2 -mfpmath=sse is required (-msse is not enough)
to avoid double rounding issues in the VM.
Most floating-point operation are now implemented in C because OCaml
is suffering double rounding issues on x86_32 with 80 bits extended
precision registers used for floating-point values, causing double
rounding making floating-point arithmetic incorrect with respect to
its specification.
Add a runtime test for double roundings.
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Beware of 0. = -0. issue for primitive floats
The IEEE 754 declares that 0. and -0. are treated equal but we cannot
say that this is true with Leibniz equality.
Therefore we must patch the equality and the total comparison inside the
kernel to prevent inconsistency.
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- remove the architecture component (we don't do anything
arch-specific so it was just a rewording of int_size)
- have configure tell the make build system about int_size instead of
reimplementing cp
As a bonus, add the copyright header to uint63.mli.
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