Add temporary fma for d32f

Author: mborland

include/boost/decimal/detail/cmath/fma.hpp

@@ -157,6 +157,11 @@ constexpr auto fmad128(decimal128 x, decimal128 y, decimal128 z) noexcept -> dec
     return x * y + z;
 }
 
+constexpr auto fmad32f(decimal32_fast x, decimal32_fast y, decimal32_fast z) noexcept -> decimal32_fast
+{
+    return x * y + z;
+}
+
 BOOST_DECIMAL_EXPORT constexpr auto fma(decimal32 x, decimal32 y, decimal32 z) noexcept -> decimal32
 {
     return fmad32(x, y, z);
@@ -172,6 +177,11 @@ BOOST_DECIMAL_EXPORT constexpr auto fma(decimal128 x, decimal128 y, decimal128 z
     return fmad128(x, y, z);
 }
 
+BOOST_DECIMAL_EXPORT constexpr auto fma(decimal32_fast x, decimal32_fast y, decimal32_fast z) noexcept -> decimal32_fast
+{
+    return fmad32f(x, y, z);
+}
+
 } //namespace decimal
 } //namespace boost