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Change hashing rules for float-like types to make 0 == -0

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This commit is contained in:
gingerBill
2025-04-16 10:52:35 +01:00
parent 990cc56974
commit 3dcc22fa6d
5 changed files with 132 additions and 4 deletions
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base/runtime/dynamic_map_internal.odin
+29
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@@ -1029,3 +1029,32 @@ default_hasher_cstring :: proc "contextless" (data: rawptr, seed: uintptr) -> ui
h &= HASH_MASK
return uintptr(h) | uintptr(uintptr(h) == 0)
}
default_hasher_f64 :: proc "contextless" (f: f64, seed: uintptr) -> uintptr {
f := f
buf: [size_of(f)]u8
if f == 0 {
return default_hasher(&buf, seed, size_of(buf))
}
if f != f {
// TODO(bill): What should the logic be for NaNs?
return default_hasher(&f, seed, size_of(f))
}
return default_hasher(&f, seed, size_of(f))
}
default_hasher_complex128 :: proc "contextless" (x, y: f64, seed: uintptr) -> uintptr {
seed := seed
seed = default_hasher_f64(x, seed)
seed = default_hasher_f64(y, seed)
return seed
}
default_hasher_quaternion256 :: proc "contextless" (x, y, z, w: f64, seed: uintptr) -> uintptr {
seed := seed
seed = default_hasher_f64(x, seed)
seed = default_hasher_f64(y, seed)
seed = default_hasher_f64(z, seed)
seed = default_hasher_f64(w, seed)
return seed
}