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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/rust/minimal-lexical/tests/rounding_tests.rs | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/minimal-lexical/tests/rounding_tests.rs')
-rw-r--r-- | third_party/rust/minimal-lexical/tests/rounding_tests.rs | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/rust/minimal-lexical/tests/rounding_tests.rs b/third_party/rust/minimal-lexical/tests/rounding_tests.rs new file mode 100644 index 0000000000..794d696fb8 --- /dev/null +++ b/third_party/rust/minimal-lexical/tests/rounding_tests.rs @@ -0,0 +1,64 @@ +use minimal_lexical::extended_float::ExtendedFloat; +use minimal_lexical::rounding; + +#[test] +fn round_test() { + let mut fp = ExtendedFloat { + mant: 9223372036854776832, + exp: -10, + }; + rounding::round::<f64, _>(&mut fp, |f, s| { + f.mant >>= s; + f.exp += s; + }); + assert_eq!(fp.mant, 0); + assert_eq!(fp.exp, 1); + + let mut fp = ExtendedFloat { + mant: 9223372036854776832, + exp: -10, + }; + rounding::round::<f64, _>(&mut fp, |f, s| { + f.mant >>= s; + f.exp += s; + // Round-up. + f.mant += 1; + }); + assert_eq!(fp.mant, 1); + assert_eq!(fp.exp, 1); + + // Round-down + let mut fp = ExtendedFloat { + mant: 9223372036854776832, + exp: -10, + }; + rounding::round::<f64, _>(&mut fp, |f, s| { + rounding::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| { + is_above || (is_odd && is_halfway) + }); + }); + assert_eq!(fp.mant, 0); + assert_eq!(fp.exp, 1); + + // Round up + let mut fp = ExtendedFloat { + mant: 9223372036854778880, + exp: -10, + }; + rounding::round::<f64, _>(&mut fp, |f, s| { + rounding::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| { + is_above || (is_odd && is_halfway) + }); + }); + assert_eq!(fp.mant, 2); + assert_eq!(fp.exp, 1); + + // Round down + let mut fp = ExtendedFloat { + mant: 9223372036854778880, + exp: -10, + }; + rounding::round::<f64, _>(&mut fp, rounding::round_down); + assert_eq!(fp.mant, 1); + assert_eq!(fp.exp, 1); +} |