diff options
| author | hryx <codroid@gmail.com> | 2019-05-12 02:00:49 -0700 |
|---|---|---|
| committer | hryx <codroid@gmail.com> | 2019-05-12 02:00:49 -0700 |
| commit | 3787f3428625e830fd852a8f5a40c7d8a2d429f6 (patch) | |
| tree | 23fb493b9d2f07c7abe57955874682959936319a /std/math/frexp.zig | |
| parent | 16aee1f58a80295f7599a8290d764a5c7040c373 (diff) | |
| parent | edcc7c72d1a684a8a16ca23ad26689f2cce4e803 (diff) | |
| download | zig-3787f3428625e830fd852a8f5a40c7d8a2d429f6.tar.gz zig-3787f3428625e830fd852a8f5a40c7d8a2d429f6.zip | |
Merge branch 'master' into rebased
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) { |