Zig 0.17.0-dev (Split by item)

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mod

udivmod.mod

inline fn mod(a: i128, b: i128) i128

File

lib/compiler_rt/udivmod.zig:46

Code

inline fn mod(a: i128, b: i128) i128 {
    const s_a = a >> (128 - 1); // s = a < 0 ? -1 : 0
    const s_b = b >> (128 - 1); // s = b < 0 ? -1 : 0

    const an = (a ^ s_a) -% s_a; // negate if s == -1
    const bn = (b ^ s_b) -% s_b; // negate if s == -1

    var r: u128 = undefined;
    _ = udivmod(u128, @as(u128, @bitCast(an)), @as(u128, @bitCast(bn)), &r);
    return (@as(i128, @bitCast(r)) ^ s_a) -% s_a; // negate if s == -1
}