From 7c88aff1a9317920eab412d2a11dd8fb3e13783b Mon Sep 17 00:00:00 2001
From: Rex Xu <rex.xu@amd.com>
Date: Wed, 11 Apr 2018 16:56:50 +0800
Subject: [PATCH] Specify SPV_AMD_gpu_shader_int16 extension string when
 frexp() takes 16-bit exp operand

---
 SPIRV/GlslangToSpv.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index 95b507b1..d2b2dee9 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -6126,6 +6126,11 @@ spv::Id TGlslangToSpvTraverser::createMiscOperation(glslang::TOperator op, spv::
             assert(builder.isPointerType(typeId1));
             typeId1 = builder.getContainedTypeId(typeId1);
             int width = builder.getScalarTypeWidth(typeId1);
+#ifdef AMD_EXTENSIONS
+            if (width == 16)
+                // Using 16-bit exp operand, enable extension SPV_AMD_gpu_shader_int16
+                builder.addExtension(spv::E_SPV_AMD_gpu_shader_int16);
+#endif
             if (builder.getNumComponents(operands[0]) == 1)
                 frexpIntType = builder.makeIntegerType(width, true);
             else