New upstream version 1.52.1+dfsg1

[rustc.git] / vendor / packed_simd / src / api / math / float / sqrte.rs

diff --git a/vendor/packed_simd/src/api/math/float/sqrte.rs b/vendor/packed_simd/src/api/math/float/sqrte.rs
new file mode 100644 (file)
index 0000000..f7ffad7
--- /dev/null
+++ b/vendor/packed_simd/src/api/math/float/sqrte.rs
@@ -0,0 +1,44 @@
+//! Implements vertical (lane-wise) floating-point `sqrte`.
+
+macro_rules! impl_math_float_sqrte {
+    ([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => {
+        impl $id {
+            /// Square-root estimate.
+            ///
+            /// FIXME: The precision of the estimate is currently unspecified.
+            #[inline]
+            pub fn sqrte(self) -> Self {
+                use crate::codegen::math::float::sqrte::Sqrte;
+                Sqrte::sqrte(self)
+            }
+        }
+
+        test_if!{
+            $test_tt:
+            paste::item! {
+                pub mod [<$id _math_sqrte>] {
+                    use super::*;
+                    #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+                    fn sqrte() {
+                        use crate::$elem_ty::consts::SQRT_2;
+                        let tol = $id::splat(2.4e-4 as $elem_ty);
+
+                        let z = $id::splat(0 as $elem_ty);
+                        let error = (z - z.sqrte()).abs();
+                        assert!(error.le(tol).all());
+
+                        let o = $id::splat(1 as $elem_ty);
+                        let error = (o - o.sqrte()).abs();
+                        assert!(error.le(tol).all());
+
+                        let t = $id::splat(2 as $elem_ty);
+                        let e = $id::splat(SQRT_2 as $elem_ty);
+                        let error = (e - t.sqrte()).abs();
+
+                        assert!(error.le(tol).all());
+                    }
+                }
+            }
+        }
+    };
+}