diff options
Diffstat (limited to 'std/math/frexp.zig')
| -rw-r--r-- | std/math/frexp.zig | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/std/math/frexp.zig b/std/math/frexp.zig index 35eec315d9..2759cd6492 100644 --- a/std/math/frexp.zig +++ b/std/math/frexp.zig @@ -1,8 +1,8 @@ -// Special Cases: +// Ported from musl, which is licensed under the MIT license: +// https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT // -// - frexp(+-0) = +-0, 0 -// - frexp(+-inf) = +-inf, 0 -// - frexp(nan) = nan, undefined +// https://git.musl-libc.org/cgit/musl/tree/src/math/frexpf.c +// https://git.musl-libc.org/cgit/musl/tree/src/math/frexp.c const std = @import("../std.zig"); const math = std.math; @@ -17,6 +17,13 @@ fn frexp_result(comptime T: type) type { pub const frexp32_result = frexp_result(f32); pub const frexp64_result = frexp_result(f64); +/// Breaks x into a normalized fraction and an integral power of two. +/// f == frac * 2^exp, with |frac| in the interval [0.5, 1). +/// +/// Special Cases: +/// - frexp(+-0) = +-0, 0 +/// - frexp(+-inf) = +-inf, 0 +/// - frexp(nan) = nan, undefined pub fn frexp(x: var) frexp_result(@typeOf(x)) { const T = @typeOf(x); return switch (T) { |