paoda
/
zba
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

chore: change implementation of rotr

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-21 05:12:32 -03:00
parent 677eecad41
commit ed896d976d
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/util.zig
View File

@ -9,11 +9,12 @@ pub inline fn sext(comptime bits: comptime_int, value: u32) u32 {
} }
/// See https://godbolt.org/z/W3en9Eche /// See https://godbolt.org/z/W3en9Eche
pub inline fn rotr(comptime T: type, value: T, r: anytype) T { pub inline fn rotr(comptime T: type, x: T, r: anytype) T {
comptime std.debug.assert(@typeInfo(T).Int.signedness == .unsigned); if (@typeInfo(T).Int.signedness == .signed)
const ar = @truncate(Log2Int(T), r); @compileError("cannot rotate signed integer");
return value >> ar | value << @truncate(Log2Int(T), @typeInfo(T).Int.bits - @as(T, ar)); const ar = @intCast(Log2Int(T), @mod(r, @typeInfo(T).Int.bits));
return x >> ar | x << (1 +% ~ar);
} }
pub const FpsAverage = struct { pub const FpsAverage = struct {