zig/test/behavior/muladd.zig

const expect = @import("std").testing.expect;

test "@mulAdd" {
    comptime testMulAdd();
    testMulAdd();
}

fn testMulAdd() void {
    {
        var a: f16 = 5.5;
        var b: f16 = 2.5;
        var c: f16 = 6.25;
        expect(@mulAdd(f16, a, b, c) == 20);
    }
    {
        var a: f32 = 5.5;
        var b: f32 = 2.5;
        var c: f32 = 6.25;
        expect(@mulAdd(f32, a, b, c) == 20);
    }
    {
        var a: f64 = 5.5;
        var b: f64 = 2.5;
        var c: f64 = 6.25;
        expect(@mulAdd(f64, a, b, c) == 20);
    }
    // Awaits implementation in libm.zig
    //{
    //    var a: f16 = 5.5;
    //    var b: f128 = 2.5;
    //    var c: f128 = 6.25;
    //    expect(@mulAdd(f128, a, b, c) == 20);
    //}
}