Add optional, external tests for floating point parsing.

Running these tests takes hours, so they are not run by @bors.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/etc/test-float-parse/subnorm.rs b/src/etc/test-float-parse/subnorm.rs
new file mode 100644
index 00000000000..70682c9b218
--- /dev/null
+++ b/src/etc/test-float-parse/subnorm.rs
@@ -0,0 +1,23 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+mod _common;
+
+use std::mem::transmute;
+use _common::validate;
+
+fn main() {
+    for bits in 0u32..(1 << 21) {
+        let single: f32 = unsafe { transmute(bits) };
+        validate(format!("{:e}", single));
+        let double: f64 = unsafe { transmute(bits as u64) };
+        validate(format!("{:e}", double));
+    }
+}