Add slang-test check for D3D11 double support (#6761)

Fixes #6171

This commit adds logic for reporting double support
to the d3d11 backend, for running tests on GPUs that
do not support D3D11_FEATURE_DOUBLES, and add checks
for that support to tests that require the feature.

7 files changed, 19 insertions, 6 deletions

diff --git a/tests/bugs/dxbc-double-problem.slang b/tests/bugs/dxbc-double-problem.slang
index 793a4b9d0..1cbf35f35 100644
--- a/tests/bugs/dxbc-double-problem.slang
+++ b/tests/bugs/dxbc-double-problem.slang
@@ -1,4 +1,4 @@
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -output-using-type -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -output-using-type -shaderobj -render-feature double
 //TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -output-using-type -shaderobj -render-feature double
 //TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
 //TEST(compute):COMPARE_COMPUTE_EX:-dx12 -compute -use-dxil -output-using-type -shaderobj
diff --git a/tests/bugs/frexp-double.slang b/tests/bugs/frexp-double.slang
index e85f23825..97b944a6a 100644
--- a/tests/bugs/frexp-double.slang
+++ b/tests/bugs/frexp-double.slang
@@ -1,4 +1,4 @@
-//TEST(smoke,compute):COMPARE_COMPUTE(filecheck-buffer=BUF):-output-using-type
+//TEST(smoke,compute):COMPARE_COMPUTE(filecheck-buffer=BUF):-output-using-type -render-feature double
 //TEST(smoke,compute):COMPARE_COMPUTE(filecheck-buffer=BUF):-dx12 -use-dxil -output-using-type
 //TEST(smoke,compute):COMPARE_COMPUTE(filecheck-buffer=BUF):-cpu -output-using-type
 //TEST(smoke,compute):COMPARE_COMPUTE(filecheck-buffer=BUF):-vk -output-using-type  -render-feature double
diff --git a/tests/compute/transcendental-double.slang b/tests/compute/transcendental-double.slang
index 025262429..dc35eb565 100644
--- a/tests/compute/transcendental-double.slang
+++ b/tests/compute/transcendental-double.slang
@@ -1,6 +1,6 @@
 //TEST(compute):COMPARE_COMPUTE:-cuda -output-using-type -shaderobj
 //TEST(compute):COMPARE_COMPUTE:-cpu -output-using-type -shaderobj
-//TEST(compute):COMPARE_COMPUTE: -output-using-type -shaderobj
+//TEST(compute):COMPARE_COMPUTE: -output-using-type -shaderobj -render-feature double
 
 // Cos values are all 0 on D3d12(!)
 //DISABLE_TEST(compute):COMPARE_COMPUTE: -dx12 -output-using-type -shaderobj
diff --git a/tests/hlsl-intrinsic/bit-cast-double.slang b/tests/hlsl-intrinsic/bit-cast-double.slang
index bacaaee03..4b1876a19 100644
--- a/tests/hlsl-intrinsic/bit-cast-double.slang
+++ b/tests/hlsl-intrinsic/bit-cast-double.slang
@@ -1,5 +1,5 @@
 //TEST(compute):COMPARE_COMPUTE_EX(filecheck-buffer=CHK):-slang -compute -cpu -shaderobj
-//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHK):-slang -compute -dx11 -shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHK):-slang -compute -dx11 -shaderobj -render-feature double
 //TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHK):-slang -compute -dx12 -shaderobj
 //TEST(compute, vulkan):COMPARE_COMPUTE_EX(filecheck-buffer=CHK):-slang -vk -compute -shaderobj -render-feature double
 //TEST(compute):COMPARE_COMPUTE_EX(filecheck-buffer=CHK):-slang -cuda -compute -shaderobj
diff --git a/tests/hlsl-intrinsic/classify-double.slang b/tests/hlsl-intrinsic/classify-double.slang
index 6cdc7dba5..839f54727 100644
--- a/tests/hlsl-intrinsic/classify-double.slang
+++ b/tests/hlsl-intrinsic/classify-double.slang
@@ -1,5 +1,5 @@
 //TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -shaderobj
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -render-feature double
 //TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -shaderobj
 //TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -render-feature double
 //TEST(compute, vulkan):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj
diff --git a/tests/hlsl-intrinsic/scalar-double-simple.slang b/tests/hlsl-intrinsic/scalar-double-simple.slang
index 1e9c25351..57049bbe7 100644
--- a/tests/hlsl-intrinsic/scalar-double-simple.slang
+++ b/tests/hlsl-intrinsic/scalar-double-simple.slang
@@ -2,7 +2,7 @@
 // For simplicity we are not going to use any intrinsics, and not use any resources that use double
 
 //TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -shaderobj
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -render-feature double
 //TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -shaderobj
 //TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -profile sm_6_0 -use-dxil -shaderobj
 //TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -render-feature double
diff --git a/tools/gfx/d3d11/d3d11-device.cpp b/tools/gfx/d3d11/d3d11-device.cpp
index ab4670a17..b101c6d13 100644
--- a/tools/gfx/d3d11/d3d11-device.cpp
+++ b/tools/gfx/d3d11/d3d11-device.cpp
@@ -267,6 +267,19 @@ SlangResult DeviceImpl::initialize(const Desc& desc)
 #endif
     }
 
+    // Check double precision support
+    {
+        D3D11_FEATURE_DATA_DOUBLES doublePrecisionFeature = {};
+        if (SUCCEEDED(m_device->CheckFeatureSupport(
+                D3D11_FEATURE_DOUBLES,
+                &doublePrecisionFeature,
+                sizeof(doublePrecisionFeature))) &&
+            doublePrecisionFeature.DoublePrecisionFloatShaderOps)
+        {
+            m_features.add("double");
+        }
+    }
+
     {
         // Create a TIMESTAMP_DISJOINT query object to query/update frequency info.
         D3D11_QUERY_DESC disjointQueryDesc = {};