From 8e5bce47661cbe1540077c6507c6e21910dbe383 Mon Sep 17 00:00:00 2001
From: Boris Zanin <boris.zanin@mobica.com>
Date: Tue, 27 Nov 2018 12:54:43 +0100
Subject: [PATCH] Allow coarse derivatives to be calced by fine func

OpDPdxCoarse (OpDPdyCoarse) are allowed to be calculated by same
formulas as OpDPdxFine (OpDPdyFine).  Also due to OpFwidthCoarse
is described as sum of OpDPdxCoarse, OpDPdyCoarse allow it to be
calculated by OpFwidthFine.

Components: vulkan

VK-GL-CTS issue: 1452

Affects: dEQP-VK.spirv_assembly.instruction.graphics.float16.derivative_*.opdpdxcoarse

Change-Id: Ib91d813626e579309d3d9176d52b0954efa920d4
---
 .../modules/vulkan/spirv_assembly/vktSpvAsmInstructionTests.cpp     | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/external/vulkancts/modules/vulkan/spirv_assembly/vktSpvAsmInstructionTests.cpp b/external/vulkancts/modules/vulkan/spirv_assembly/vktSpvAsmInstructionTests.cpp
index 94e7d7e..a0a6799 100644
--- a/external/vulkancts/modules/vulkan/spirv_assembly/vktSpvAsmInstructionTests.cpp
+++ b/external/vulkancts/modules/vulkan/spirv_assembly/vktSpvAsmInstructionTests.cpp
@@ -10318,9 +10318,9 @@ tcu::TestCaseGroup* createDerivativeTests (tcu::TestContext& testCtx)
 		{ "OpDPdxFine"		,	float16InputX	,	compareDerivative<R, N, 1, getFDxFine		>	},
 		{ "OpDPdyFine"		,	float16InputY	,	compareDerivative<R, N, 1, getFDyFine		>	},
 		{ "OpFwidthFine"	,	float16InputW	,	compareDerivative<R, N, 1, getFWidthFine	>	},
-		{ "OpDPdxCoarse"	,	float16InputX	,	compareDerivative<R, N, 2, getFDxCoarse	>	},
-		{ "OpDPdyCoarse"	,	float16InputY	,	compareDerivative<R, N, 2, getFDyCoarse	>	},
-		{ "OpFwidthCoarse"	,	float16InputW	,	compareDerivative<R, N, 4, getFWidthCoarse	>	},
+		{ "OpDPdxCoarse"	,	float16InputX	,	compareDerivative<R, N, 3, getFDx			>	},
+		{ "OpDPdyCoarse"	,	float16InputY	,	compareDerivative<R, N, 3, getFDy			>	},
+		{ "OpFwidthCoarse"	,	float16InputW	,	compareDerivative<R, N, 5, getFWidth		>	},
 		{ "OpDPdx"			,	float16InputX	,	compareDerivative<R, N, 3, getFDx			>	},
 		{ "OpDPdy"			,	float16InputY	,	compareDerivative<R, N, 3, getFDy			>	},
 		{ "OpFwidth"		,	float16InputW	,	compareDerivative<R, N, 5, getFWidth		>	},
-- 
2.7.4