math: Add asin, acos & atan

Wallbraker · Wallbraker · commit c865f66dd5d0 · 2019-11-09T23:23:12.000Z
diff --git a/src/watt/math/floating.volt b/src/watt/math/floating.volt
@@ -21,6 +21,15 @@ extern(C) fn sinf(f32) f32;
 alias sin = sinf;
 //! @}
 
+/*!
+ * Calculate the arc sine function of a number.
+ * @{
+ */
+extern(C) fn asin(f64) f64;
+extern(C) fn asinf(f32) f32;
+alias asin = asinf;
+//! @}
+
 /*!
  * Calculate the cosine function of a number.
  * @{
@@ -30,6 +39,15 @@ extern(C) fn cosf(f32) f32;
 alias cos = cosf;
 //! @}
 
+/*!
+ * Calculate the arc cosine function of a number.
+ * @{
+ */
+extern(C) fn acos(f64) f64;
+extern(C) fn acosf(f32) f32;
+alias acos = acosf;
+//! @}
+
 /*!
  * Calculate the tangent function of a number.
  * @{
@@ -39,6 +57,15 @@ extern(C) fn tanf(f32) f32;
 alias tan = tanf;
 //! @}
 
+/*!
+ * Calculate the arc tangent function of a number.
+ * @{
+ */
+extern(C) fn atan(f64) f64;
+extern(C) fn atanf(f32) f32;
+alias atan = atanf;
+//! @}
+
 /*!
  * Calculate the square root of a number.
  * @{
