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| author | Guillaume Bertholon | 2018-07-13 16:22:35 +0200 |
|---|---|---|
| committer | Pierre Roux | 2019-11-01 10:20:03 +0100 |
| commit | b0b3cc67e01b165272588b2d8bc178840ba83945 (patch) | |
| tree | 0fc62f69eb0b56a3cae6dd81f82ca869dac6fbc9 /kernel/uint63_31.ml | |
| parent | f93684a412f067622a5026c406bc76032c30b6e9 (diff) | |
Add primitive float computation in Coq kernel
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.
Diffstat (limited to 'kernel/uint63_31.ml')
| -rw-r--r-- | kernel/uint63_31.ml | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/uint63_31.ml b/kernel/uint63_31.ml index b8eccd19fb..76d768e20a 100644 --- a/kernel/uint63_31.ml +++ b/kernel/uint63_31.ml @@ -26,6 +26,10 @@ let mask63 i = Int64.logand i maxuint63 let of_int i = Int64.of_int i let to_int2 i = (Int64.to_int (Int64.shift_right_logical i 31), Int64.to_int i) let of_int64 i = i + +let of_float f = mask63 (Int64.of_float f) +let to_float = Int64.to_float + let hash i = let (h,l) = to_int2 i in (*Hashset.combine h l*) |