Added fma implementation based on std::fma #969

g-truc · Nov 6, 2019 · 95b1cdb · 95b1cdb
1 parent 338bdea
commit 95b1cdb
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Showing 2 changed files with 10 additions and 5 deletions.
diff --git a/glm/detail/func_common.inl b/glm/detail/func_common.inl
@@ -737,11 +737,15 @@ namespace detail
 		return reinterpret_cast<vec<L, float, Q>&>(const_cast<vec<L, uint, Q>&>(v));
 	}
 
-	template<typename genType>
-	GLM_FUNC_QUALIFIER genType fma(genType const& a, genType const& b, genType const& c)
-	{
-		return a * b + c;
-	}
+#	if GLM_HAS_CXX11_STL
+		using std::fma;
+#	else
+		template<typename genType>
+		GLM_FUNC_QUALIFIER genType fma(genType const& a, genType const& b, genType const& c)
+		{
+			return a * b + c;
+		}
+#	endif
 
 	template<typename genType>
 	GLM_FUNC_QUALIFIER genType frexp(genType x, int& exp)

diff --git a/readme.md b/readme.md
@@ -57,6 +57,7 @@ glm::mat4 camera(float Translate, glm::vec2 const& Rotate)
 #### Improvements:
 - Improved Neon support with more functions optimized #950
 - Added CMake GLM interface #963
+- Added fma implementation based on std::fma #969
 
 #### Fixes:
 - Fixed equal ULP variation when using negative sign #965