From 9280818a573d48890153154089bc7eb2c4203da0 Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Sat, 20 Apr 2019 21:24:02 +0100
Subject: [PATCH] [util] Implement fclamp for fp special cases

---
 src/util/util_math.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/util/util_math.h b/src/util/util_math.h
index 806a563ba..29e052f0b 100644
--- a/src/util/util_math.h
+++ b/src/util/util_math.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <cmath>
+
 namespace dxvk {
   
   constexpr size_t CACHE_LINE_SIZE = 64;
@@ -15,5 +17,13 @@ namespace dxvk {
   constexpr T align(T what, U to) {
     return (what + to - 1) & ~(to - 1);
   }
+
+  // Equivalent of std::clamp for use with floating point numbers
+  // Handles (-){INFINITY,NAN} cases.
+  // Will return min in cases of NAN, etc.
+  inline float fclamp(float value, float min, float max) {
+    return std::fmin(
+      std::fmax(value, min), max);
+  }
   
 }
\ No newline at end of file