From cc51dc56604763485dfe07e78b8fead5c43737ee Mon Sep 17 00:00:00 2001
From: Jeannette Yu <jeannette.yu@unity3d.com>
Date: Tue, 27 Apr 2021 10:21:28 -0700
Subject: [PATCH 1/2] Ensure broader support by overriding half into min16float
 when unified model is enabled

---
 .../ShaderLibrary/Common.hlsl                 | 27 ++++++++++---------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl b/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl
index 3fd7994b294..477049d43f0 100644
--- a/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl
+++ b/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl
@@ -87,6 +87,20 @@
 #define REAL_IS_HALF 0
 #endif // Do we have half?
 
+#if REAL_IS_HALF || (defined(UNITY_UNIFIED_SHADER_PRECISION_MODEL) && (defined(UNITY_COMPILER_HLSL) || defined(UNITY_COMPILER_DXC)))
+#define half min16float
+#define half2 min16float2
+#define half3 min16float3
+#define half4 min16float4
+#define half2x2 min16float2x2
+#define half2x3 min16float2x3
+#define half3x2 min16float3x2
+#define half3x3 min16float3x3
+#define half3x4 min16float3x4
+#define half4x3 min16float4x3
+#define half4x4 min16float4x4
+#endif
+
 #if REAL_IS_HALF
 #define real half
 #define real2 half2
@@ -102,19 +116,6 @@
 #define real4x3 half4x3
 #define real4x4 half4x4
 
-#define half min16float
-#define half2 min16float2
-#define half3 min16float3
-#define half4 min16float4
-
-#define half2x2 min16float2x2
-#define half2x3 min16float2x3
-#define half3x2 min16float3x2
-#define half3x3 min16float3x3
-#define half3x4 min16float3x4
-#define half4x3 min16float4x3
-#define half4x4 min16float4x4
-
 #define REAL_MIN HALF_MIN
 #define REAL_MAX HALF_MAX
 #define REAL_EPS HALF_EPS

From 9307ec9d635492b66fe9da023bf2f19b871b56d9 Mon Sep 17 00:00:00 2001
From: Jeannette Yu <jeannette.yu@unity3d.com>
Date: Tue, 27 Apr 2021 22:35:32 -0700
Subject: [PATCH 2/2] Changelog

---
 com.unity.render-pipelines.core/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/com.unity.render-pipelines.core/CHANGELOG.md b/com.unity.render-pipelines.core/CHANGELOG.md
index fad9159d4b6..10ec9ad3cdd 100644
--- a/com.unity.render-pipelines.core/CHANGELOG.md
+++ b/com.unity.render-pipelines.core/CHANGELOG.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed normal bias field of reference volume being wrong until the profile UI was displayed.
 - Fixed L2 for Probe Volumes.
 - Fixed assertion on compression of L1 coefficients for Probe Volume.
+- Explicit half precision not working even when Unified Shader Precision Model is enabled.
 
 ### Added
 - Support for the PlayStation 5 platform has been added.