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After adding tests, the current implementation for fminimum fails when
provided a negative zero and NaN as inputs:
---- math::fminimum_fmaximum_num::tests::fmaximum_num_spec_tests_f64 stdout ----
thread 'math::fminimum_fmaximum_num::tests::fmaximum_num_spec_tests_f64' panicked at libm/src/math/fminimum_fmaximum_num.rs:240:13:
fmaximum_num(-0x0p+0, NaN)
l: NaN (0x7ff8000000000000)
r: -0.0 (0x8000000000000000)
---- math::fminimum_fmaximum_num::tests::fmaximum_num_spec_tests_f32 stdout ----
thread 'math::fminimum_fmaximum_num::tests::fmaximum_num_spec_tests_f32' panicked at libm/src/math/fminimum_fmaximum_num.rs:240:13:
fmaximum_num(-0x0p+0, NaN)
l: NaN (0x7fc00000)
r: -0.0 (0x80000000)
Add more thorough spec tests for these functions and correct the
implementations.
Canonicalization is also moved to a trait method to centralize
documentation about what it does and doesn't do.
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