1 files changed, 51 insertions, 0 deletions
diff --git a/vendor/libm-0.1.4/src/math/ceil.rs b/vendor/libm-0.1.4/src/math/ceil.rs
new file mode 100644
index 000000000..59883a8a7
--- /dev/null
+++ b/vendor/libm-0.1.4/src/math/ceil.rs
@@ -0,0 +1,51 @@
+use core::f64;
+
+const TOINT: f64 = 1. / f64::EPSILON;
+
+/// Ceil (f64)
+///
+/// Finds the nearest integer greater than or equal to `x`.
+#[inline]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn ceil(x: f64) -> f64 {
+    // On wasm32 we know that LLVM's intrinsic will compile to an optimized
+    // `f64.ceil` native instruction, so we can leverage this for both code size
+    // and speed.
+    llvm_intrinsically_optimized! {
+        #[cfg(target_arch = "wasm32")] {
+            return unsafe { ::core::intrinsics::ceilf64(x) }
+        }
+    }
+    let u: u64 = x.to_bits();
+    let e: i64 = (u >> 52 & 0x7ff) as i64;
+    let y: f64;
+
+    if e >= 0x3ff + 52 || x == 0. {
+        return x;
+    }
+    // y = int(x) - x, where int(x) is an integer neighbor of x
+    y = if (u >> 63) != 0 {
+        x - TOINT + TOINT - x
+    } else {
+        x + TOINT - TOINT - x
+    };
+    // special case because of non-nearest rounding modes
+    if e < 0x3ff {
+        force_eval!(y);
+        return if (u >> 63) != 0 { -0. } else { 1. };
+    }
+    if y < 0. {
+        x + y + 1.
+    } else {
+        x + y
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn sanity_check() {
+        assert_eq!(super::ceil(1.1), 2.0);
+        assert_eq!(super::ceil(2.9), 3.0);
+    }
+}