[llvm-branch-commits] [llvm] [DirectX] Adding support for static samples is yaml2obj/obj2yaml (PR #139963)

[via llvm-branch-commits]

================
@@ -1157,3 +1157,49 @@ TEST(RootSignature, ParseDescriptorTable) {
     ASSERT_EQ(Range.OffsetInDescriptorsFromTableStart, -1);
   }
 }
+
+TEST(RootSignature, ParseStaticSamplers) {
+  {
+    uint8_t Buffer[] = {
+        0x44, 0x58, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+        0x90, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x52, 0x54, 0x53, 0x30, 0x4c, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+        0x18, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00,
+        0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
+        0xa4, 0x70, 0x9d, 0x3f, 0x14, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x85, 0xeb, 0x91, 0x40, 0x66, 0x66, 0x0e, 0x41,
+        0x1f, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 
0x00};
+    DXContainer C =
+        llvm::cantFail(DXContainer::create(getMemoryBuffer<133>(Buffer)));
+
+    auto MaybeRS = C.getRootSignature();
+    ASSERT_TRUE(MaybeRS.has_value());
+    const auto &RS = MaybeRS.value();
+    ASSERT_EQ(RS.getVersion(), 2u);
+    ASSERT_EQ(RS.getNumParameters(), 0u);
+    ASSERT_EQ(RS.getRootParametersOffset(), 0u);
+    ASSERT_EQ(RS.getNumStaticSamplers(), 1u);
+    ASSERT_EQ(RS.getStaticSamplersOffset(), 24u);
+    ASSERT_EQ(RS.getFlags(), 17u);
+
+    auto Sampler = *RS.samplers().begin();
+
+    ASSERT_EQ(Sampler.Filter, 10u);
+    ASSERT_EQ(Sampler.AddressU, 1u);
+    ASSERT_EQ(Sampler.AddressV, 2u);
+    ASSERT_EQ(Sampler.AddressW, 5u);
+    EXPECT_FLOAT_EQ(Sampler.MipLODBias, 1.23);
+    ASSERT_EQ(Sampler.MaxAnisotropy, 20u);
+    ASSERT_EQ(Sampler.ComparisonFunc, 4u);
+    ASSERT_EQ(Sampler.BorderColor, 0u);
+    EXPECT_FLOAT_EQ(Sampler.MinLOD, 4.56);
----------------
joaosaffran wrote:

`EXPECT_FLOAT_EQ` accounts for rounding errors, and make sure the floats are 
approximately equal instead of exactly equal, they consider an error within 4 
Units in the Last Place (ULPs), here is the documentation about it 
https://google.github.io/googletest/reference/assertions.html#EXPECT_FLOAT_EQ

https://github.com/llvm/llvm-project/pull/139963
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