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Add math.signbit; Add math.gamma based on http://netlib.sandia.gov/cephes/cprob/gamma.c

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gingerBill
2021-11-16 15:23:19 +00:00
parent b530ca9a5e
commit 2b546a598c
2 changed files with 248 additions and 0 deletions
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core/math/math.odin
+22
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@@ -1642,6 +1642,28 @@ nextafter :: proc{
nextafter_f64, nextafter_f64le, nextafter_f64be,
}
signbit_f16 :: proc "contextless" (x: f16) -> bool {
return (transmute(u16)x)&(1<<15) != 0
}
signbit_f32 :: proc "contextless" (x: f32) -> bool {
return (transmute(u32)x)&(1<<31) != 0
}
signbit_f64 :: proc "contextless" (x: f64) -> bool {
return (transmute(u64)x)&(1<<63) != 0
}
signbit_f16le :: proc "contextless" (x: f16le) -> bool { return signbit_f16(f16(x)) }
signbit_f32le :: proc "contextless" (x: f32le) -> bool { return signbit_f32(f32(x)) }
signbit_f64le :: proc "contextless" (x: f64le) -> bool { return signbit_f64(f64(x)) }
signbit_f16be :: proc "contextless" (x: f16be) -> bool { return signbit_f16(f16(x)) }
signbit_f32be :: proc "contextless" (x: f32be) -> bool { return signbit_f32(f32(x)) }
signbit_f64be :: proc "contextless" (x: f64be) -> bool { return signbit_f64(f64(x)) }
signbit :: proc{
signbit_f16, signbit_f16le, signbit_f16be,
signbit_f32, signbit_f32le, signbit_f32be,
signbit_f64, signbit_f64le, signbit_f64be,
}
F16_DIG :: 3
F16_EPSILON :: 0.00097656