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Merge pull request #3082 from edyu/master

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Fix math/fixed floor/ceil/round
This commit is contained in:
Jeroen van Rijn
2024-01-17 19:13:22 +01:00
committed by GitHub
parent 90ac400ec5 7f6f971284
commit 1b83f4a18b
1 changed files with 7 additions and 5 deletions
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core/math/fixed/fixed.odin
+7 -5
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@@ -88,17 +88,19 @@ div_sat :: proc(x, y: $T/Fixed($Backing, $Fraction_Width)) -> (z: T) {
@(require_results) @(require_results)
floor :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing { floor :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing {
return x.i >> Fraction_Width if x.i >= 0 {
return x.i >> Fraction_Width
} else {
return (x.i - (1 << (Fraction_Width - 1)) + (1 << (Fraction_Width - 2))) >> Fraction_Width
}
} }
@(require_results) @(require_results)
ceil :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing { ceil :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing {
Integer :: 8*size_of(Backing) - Fraction_Width return (x.i + (1 << Fraction_Width - 1)) >> Fraction_Width
return (x.i + (1 << Integer-1)) >> Fraction_Width
} }
@(require_results) @(require_results)
round :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing { round :: proc(x: $T/Fixed($Backing, $Fraction_Width)) -> Backing {
Integer :: 8*size_of(Backing) - Fraction_Width return (x.i + (1 << (Fraction_Width - 1))) >> Fraction_Width
return (x.i + (1 << (Integer - 1))) >> Fraction_Width
} }