snan

Returns a signalling NaN representation for a floating point Type.

TODO: LLVM is known to miscompile on some architectures to quiet NaN - this is tracked by https://github.com/ziglang/zig/issues/14366

Function parameters

Parameters

Type:type

Functions in this namespace

Functions

FloatRepr
floatExponentBits: Returns the number of bits in the exponent of floating point type T.
floatMantissaBits: Returns the number of bits in the mantissa of floating point type T.
floatFractionalBits: Returns the number of fractional bits in the mantissa of floating point type T.
floatExponentMin: Returns the minimum exponent that can represent
floatExponentMax: Returns the maximum exponent that can represent
floatTrueMin: Returns the smallest subnormal number representable in floating point type T.
floatMin: Returns the smallest normal number representable in floating point type T.
floatMax: Returns the largest normal number representable in floating point type T.
floatEps: Returns the machine epsilon of floating point type T.
floatEpsAt: Returns the local epsilon of floating point type T.
inf: Returns the inf value for a floating point `Type`.
nan: Returns the canonical quiet NaN representation for a floating point `Type`.
snan: Returns a signalling NaN representation for a floating point `Type`.

Source

Implementation

pub inline fn snan(comptime Type: type) Type {
    const RuntimeType = switch (Type) {
        else => Type,
        comptime_float => f128, // any float type will do
    };
    return reconstructFloat(
        RuntimeType,
        floatExponentMax(RuntimeType) + 1,
        mantissaOne(RuntimeType) | 1 << (floatFractionalBits(RuntimeType) - 2),
    );
}