COMPMID-1104 Add fast math hint in the graph API

Change-Id: I83db135fa94c6884e080f0229a9b6430d908c029
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/129823
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/graph/TypePrinter.h b/arm_compute/graph/TypePrinter.h
index 0ecd57d..6babd39 100644
--- a/arm_compute/graph/TypePrinter.h
+++ b/arm_compute/graph/TypePrinter.h
@@ -295,6 +295,24 @@
     return os;
 }
 
+/** Formatted output of the FastMathHint type. */
+inline ::std::ostream &operator<<(::std::ostream &os, const FastMathHint &hint)
+{
+    switch(hint)
+    {
+        case FastMathHint::ENABLED:
+            os << "ENABLED";
+            break;
+        case FastMathHint::DISABLED:
+            os << "DISABLED";
+            break;
+        default:
+            ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
+    }
+
+    return os;
+}
+
 /** Formatted output of the DepthwiseConvolutionMethod type. */
 inline ::std::ostream &operator<<(::std::ostream &os, const DepthwiseConvolutionMethod &method)
 {