vlib/math: Add a pure V backend for vlib/math (#11267)

vlib/math/floor.js.v

@@ -0,0 +1,34 @@
+module math
+
+fn JS.Math.ceil(x f64) f64
+
+fn JS.Math.floor(x f64) f64
+
+fn JS.Math.round(x f64) f64
+
+fn JS.Math.trunc(x f64) f64
+
+// ceil returns the nearest f64 greater or equal to the provided value.
+[inline]
+pub fn ceil(x f64) f64 {
+	return JS.Math.ceil(x)
+}
+
+// floor returns the nearest f64 lower or equal of the provided value.
+[inline]
+pub fn floor(x f64) f64 {
+	return JS.Math.floor(x)
+}
+
+// round returns the integer nearest to the provided value.
+[inline]
+pub fn round(x f64) f64 {
+	return JS.Math.round(x)
+}
+
+// trunc rounds a toward zero, returning the nearest integral value that is not
+// larger in magnitude than a.
+[inline]
+pub fn trunc(x f64) f64 {
+	return JS.Math.trunc(x)
+}