Add basic f16 and f128 modules

Create empty modules so `rustdoc` has someplace to link to for these
types.

1 files changed, 11 insertions, 0 deletions

diff --git a/library/std/src/f16.rs b/library/std/src/f16.rs
new file mode 100644
index 00000000000..c36f9f5d4c6
--- /dev/null
+++ b/library/std/src/f16.rs
@@ -0,0 +1,11 @@
+//! Constants for the `f16` double-precision floating point type.
+//!
+//! *[See also the `f16` primitive type](primitive@f16).*
+//!
+//! Mathematically significant numbers are provided in the `consts` sub-module.
+
+#[cfg(test)]
+mod tests;
+
+#[unstable(feature = "f16", issue = "116909")]
+pub use core::f16::consts;