add roundUp assertion
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@ -1,4 +1,5 @@
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const std = @import("std");
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const assert = std.debug.assert;
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// rounds up a u12 to the nearest factor of 4 and returns the difference
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// (padding)
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@ -8,6 +9,7 @@ pub fn roundUpPadding(comptime T: type, comptime nbits: u8, n: T) T {
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// rounds up a u12 to the nearest factor of 4.
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pub fn roundUp(comptime T: type, comptime nbits: u8, n: T) T {
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comptime assert(nbits < @bitSizeOf(T));
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const factor = comptime (1 << nbits) - 1;
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return ((n + factor) & ~@as(T, factor));
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}
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