Matrix tests and assorted bug tests (#1814)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Some test around matrix layout.

* A test for problem with C++ code output.

* Default should be column major CPU/CUDA tests confused this.

* Added column-major test

* Small fixes around tabs/comments

* Diagnostic problem for init of vector type with inappropriate params.

* Test demonstrating inconsistency between GPU and 'CPU-like' non square matrices.

* Added column major non square test.

* Remove vector mismatch - because ambiguity is arguably reasonable because float can silently promote to a vector.

* Small typo fixes for non-square-column-major.slang

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/compute/default-major.slang b/tests/compute/default-major.slang
new file mode 100644
index 000000000..743dbe656
--- /dev/null
+++ b/tests/compute/default-major.slang
@@ -0,0 +1,32 @@
+// default-major.slang
+
+// The default layout should be column. Unfortunately CPU and CUDA only work with row layout, so they have to be disabled here.
+
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -compile-arg -O3 -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -output-using-type -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -output-using-type -dx12 -shaderobj
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -output-using-type -shaderobj
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -output-using-type -shaderobj
+
+// This data is in column major layout order.... 
+//TEST_INPUT:cbuffer(data=[1.0 0.0 0.0 10.0  0.0 1.0 0.0 20.0  0.0 0.0 1.0 30.0  0.0 0.0 0.0 1.0]):name matrixBuffer
+
+ConstantBuffer<float4x4> matrixBuffer;
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name output
+RWStructuredBuffer<float> output;
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 tid : SV_DispatchThreadID)
+{
+    float4 v = float4(1, 2, 3, 1);
+
+    float4x4 M = matrixBuffer;
+    
+    float4 r = mul(v, M);
+
+    output[0] = r.x;
+    output[1] = r.y;
+    output[2] = r.z;
+    output[3] = r.w;
+}