1 files changed, 18 insertions, 0 deletions
diff --git a/vendor/libm-0.1.4/src/math/fabs.rs b/vendor/libm-0.1.4/src/math/fabs.rs
new file mode 100644
index 000000000..52a9adcbf
--- /dev/null
+++ b/vendor/libm-0.1.4/src/math/fabs.rs
@@ -0,0 +1,18 @@
+use core::u64;
+
+/// Absolute value (magnitude) (f64)
+/// Calculates the absolute value (magnitude) of the argument `x`,
+/// by direct manipulation of the bit representation of `x`.
+#[inline]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn fabs(x: f64) -> f64 {
+    // On wasm32 we know that LLVM's intrinsic will compile to an optimized
+    // `f64.abs` native instruction, so we can leverage this for both code size
+    // and speed.
+    llvm_intrinsically_optimized! {
+        #[cfg(target_arch = "wasm32")] {
+            return unsafe { ::core::intrinsics::fabsf64(x) }
+        }
+    }
+    f64::from_bits(x.to_bits() & (u64::MAX / 2))
+}