Add missing fast functions to API documentation

Author: stijnh

docs/build_api.py

@@ -189,13 +189,14 @@ def build_index_page(groups):
             "sin",
             "sinh",
             ("sqrt", "sqrt(const V&)"),
+            "rsqrt",
             "tan",
             "tanh",
             "tgamma",
-            "trunc",
+            "rcp",
             "rint",
-            "rsqrt",
             "round",
+            "trunc",
             "signbit",
             "isinf",
             "isnan",
@@ -206,6 +207,9 @@ def build_index_page(groups):
                 "fast_cos",
                 "fast_sin",
                 "fast_tan",
+                "fast_rcp",
+                "fast_sqrt",
+                "fast_rsqrt",
                 "fast_div",
         ],
         "Conditional": [