1 files changed, 23 insertions, 0 deletions
diff --git a/vendor/libm/src/math/fdim.rs b/vendor/libm/src/math/fdim.rs
new file mode 100644
index 000000000..06edc9960
--- /dev/null
+++ b/vendor/libm/src/math/fdim.rs
@@ -0,0 +1,23 @@
+use core::f64;
+
+/// Positive difference (f64)
+///
+/// Determines the positive difference between arguments, returning:
+/// * x - y	if x > y, or
+/// * +0	if x <= y, or
+/// * NAN	if either argument is NAN.
+///
+/// A range error may occur.
+#[inline]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn fdim(x: f64, y: f64) -> f64 {
+    if x.is_nan() {
+        x
+    } else if y.is_nan() {
+        y
+    } else if x > y {
+        x - y
+    } else {
+        0.0
+    }
+}