diff --git a/tests/d3d12_descriptors.c b/tests/d3d12_descriptors.c
index 73493770..8f9265cd 100644
--- a/tests/d3d12_descriptors.c
+++ b/tests/d3d12_descriptors.c
@@ -5118,4 +5118,168 @@ void test_uav_3d_sliced_view(void)
     ID3D12PipelineState_Release(pso_poison);
     ID3D12DescriptorHeap_Release(heap);
     destroy_test_context(&context);
-}
\ No newline at end of file
+}
+
+void test_root_descriptor_offset_sign(void)
+{
+    /* Exploratory test in nature. Will likely crash GPU if not on native drivers. Tweak ifdef to run it. */
+#if 1
+    skip("Skipping exploratory test for root descriptor over/underflow test.\n");
+#else
+    ID3D12RootSignature *root_signature;
+    D3D12_ROOT_PARAMETER root_params[3];
+    D3D12_ROOT_SIGNATURE_DESC rs_desc;
+    ID3D12Resource *output_buffer;
+    ID3D12Resource *input_buffer;
+    struct resource_readback rb;
+    struct test_context context;
+    ID3D12PipelineState *pso;
+    uint32_t values[4];
+    unsigned int i;
+
+    static const BYTE cs_code_dxil[] =
+    {
+#if 0
+        RWStructuredBuffer<uint4> RW : register(u0);
+        StructuredBuffer<uint> R0 : register(t0);
+        ByteAddressBuffer R1 : register(t1);
+
+        [numthreads(1, 1, 1)]
+        void main()
+        {
+                uint a = R0[-1];       // Negative index
+                uint b = R0[1u << 30]; // offset 4 GB. Does it overflow back to 0?
+                uint c = R1.Load(-4);  // Negative offset
+                uint d = R1.Load(0);
+                RW[0] = uint4(a, b, c, d);
+        }
+#endif
+        0x44, 0x58, 0x42, 0x43, 0xac, 0xbf, 0xf4, 0x1f, 0x2f, 0x84, 0x34, 0x51, 0x10, 0xd2, 0xe1, 0x21, 0x95, 0x3b, 0xc5, 0x21, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x07, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
+        0x38, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00, 0x68, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x1c, 0x01, 0x00, 0x00, 0x53, 0x46, 0x49, 0x30, 0x08, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x49, 0x53, 0x47, 0x31, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x4f, 0x53, 0x47, 0x31, 0x08, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x50, 0x53, 0x56, 0x30, 0x90, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+        0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x48, 0x41, 0x53, 0x48, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe5, 0x8f, 0xa6, 0x7e, 0x5d, 0xa7, 0xe6, 0xd6, 0x02, 0xac, 0xbd, 0xbf, 0x6f, 0x1b, 0xee, 0xc4, 0x44, 0x58, 0x49, 0x4c,
+        0xe8, 0x05, 0x00, 0x00, 0x60, 0x00, 0x05, 0x00, 0x7a, 0x01, 0x00, 0x00, 0x44, 0x58, 0x49, 0x4c, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0xd0, 0x05, 0x00, 0x00, 0x42, 0x43, 0xc0, 0xde,
+        0x21, 0x0c, 0x00, 0x00, 0x71, 0x01, 0x00, 0x00, 0x0b, 0x82, 0x20, 0x00, 0x02, 0x00, 0x00, 0x00, 0x13, 0x00, 0x00, 0x00, 0x07, 0x81, 0x23, 0x91, 0x41, 0xc8, 0x04, 0x49, 0x06, 0x10, 0x32, 0x39,
+        0x92, 0x01, 0x84, 0x0c, 0x25, 0x05, 0x08, 0x19, 0x1e, 0x04, 0x8b, 0x62, 0x80, 0x14, 0x45, 0x02, 0x42, 0x92, 0x0b, 0x42, 0xa4, 0x10, 0x32, 0x14, 0x38, 0x08, 0x18, 0x4b, 0x0a, 0x32, 0x52, 0x88,
+        0x48, 0x90, 0x14, 0x20, 0x43, 0x46, 0x88, 0xa5, 0x00, 0x19, 0x32, 0x42, 0xe4, 0x48, 0x0e, 0x90, 0x91, 0x22, 0xc4, 0x50, 0x41, 0x51, 0x81, 0x8c, 0xe1, 0x83, 0xe5, 0x8a, 0x04, 0x29, 0x46, 0x06,
+        0x51, 0x18, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1b, 0x8c, 0xe0, 0xff, 0xff, 0xff, 0xff, 0x07, 0x40, 0x02, 0xaa, 0x0d, 0x84, 0xf0, 0xff, 0xff, 0xff, 0xff, 0x03, 0x20, 0x01, 0x00, 0x00, 0x00,
+        0x49, 0x18, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x13, 0x82, 0x60, 0x42, 0x20, 0x00, 0x00, 0x00, 0x89, 0x20, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00, 0x32, 0x22, 0x48, 0x09, 0x20, 0x64, 0x85, 0x04,
+        0x93, 0x22, 0xa4, 0x84, 0x04, 0x93, 0x22, 0xe3, 0x84, 0xa1, 0x90, 0x14, 0x12, 0x4c, 0x8a, 0x8c, 0x0b, 0x84, 0xa4, 0x4c, 0x10, 0x60, 0x23, 0x00, 0x25, 0x00, 0x14, 0xe6, 0x08, 0x10, 0x1a, 0xf7,
+        0x0c, 0x97, 0x3f, 0x61, 0x0f, 0x21, 0xf9, 0x21, 0xd0, 0x0c, 0x0b, 0x81, 0x02, 0x32, 0x47, 0x00, 0x06, 0x73, 0x04, 0x41, 0x31, 0x8a, 0x19, 0xc6, 0x1c, 0x42, 0x37, 0x0d, 0x97, 0x3f, 0x61, 0x0f,
+        0x21, 0xf9, 0x2b, 0x21, 0xad, 0xc4, 0xe4, 0x23, 0xb7, 0x8d, 0x0a, 0x63, 0x8c, 0x31, 0xa5, 0x50, 0xa6, 0x18, 0x43, 0xab, 0x28, 0xc0, 0x14, 0x63, 0x8c, 0x31, 0x66, 0x50, 0x1b, 0x08, 0x98, 0x89,
+        0x0c, 0xc6, 0x81, 0x1d, 0xc2, 0x61, 0x1e, 0xe6, 0xc1, 0x0d, 0x66, 0x81, 0x1e, 0xe4, 0xa1, 0x1e, 0xc6, 0x81, 0x1e, 0xea, 0x41, 0x1e, 0xca, 0x81, 0x1c, 0x44, 0xa1, 0x1e, 0xcc, 0xc1, 0x1c, 0xca,
+        0x41, 0x1e, 0xf8, 0xa0, 0x1e, 0xdc, 0x61, 0x1e, 0xd2, 0xe1, 0x1c, 0xdc, 0xa1, 0x1c, 0xc8, 0x01, 0x0c, 0xd2, 0xc1, 0x1d, 0xe8, 0xc1, 0x0f, 0x50, 0x60, 0x08, 0x1e, 0x26, 0x4d, 0x11, 0x25, 0x4c,
+        0xfe, 0x86, 0x4d, 0x84, 0x36, 0x0c, 0x11, 0x21, 0x49, 0x1b, 0x55, 0x14, 0x44, 0x84, 0x02, 0x43, 0x72, 0x18, 0x81, 0x30, 0x66, 0x92, 0x83, 0x71, 0x60, 0x87, 0x70, 0x98, 0x87, 0x79, 0x70, 0x03,
+        0x59, 0xb8, 0x85, 0x59, 0xa0, 0x07, 0x79, 0xa8, 0x87, 0x71, 0xa0, 0x87, 0x7a, 0x90, 0x87, 0x72, 0x20, 0x07, 0x51, 0xa8, 0x07, 0x73, 0x30, 0x87, 0x72, 0x90, 0x07, 0x3e, 0xb0, 0x87, 0x72, 0x18,
+        0x07, 0x7a, 0x78, 0x07, 0x79, 0xe0, 0x83, 0x7a, 0x70, 0x87, 0x79, 0x48, 0x87, 0x73, 0x70, 0x87, 0x72, 0x20, 0x07, 0x30, 0x48, 0x07, 0x77, 0xa0, 0x07, 0x36, 0x00, 0x03, 0x3a, 0xf0, 0x03, 0x30,
+        0xf0, 0x03, 0x14, 0x50, 0xaa, 0x73, 0x04, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x13, 0x14, 0x72, 0xc0, 0x87, 0x74, 0x60, 0x87, 0x36, 0x68, 0x87, 0x79, 0x68, 0x03, 0x72, 0xc0, 0x87, 0x0d, 0xaf, 0x50,
+        0x0e, 0x6d, 0xd0, 0x0e, 0x7a, 0x50, 0x0e, 0x6d, 0x00, 0x0f, 0x7a, 0x30, 0x07, 0x72, 0xa0, 0x07, 0x73, 0x20, 0x07, 0x6d, 0x90, 0x0e, 0x71, 0xa0, 0x07, 0x73, 0x20, 0x07, 0x6d, 0x90, 0x0e, 0x78,
+        0xa0, 0x07, 0x73, 0x20, 0x07, 0x6d, 0x90, 0x0e, 0x71, 0x60, 0x07, 0x7a, 0x30, 0x07, 0x72, 0xd0, 0x06, 0xe9, 0x30, 0x07, 0x72, 0xa0, 0x07, 0x73, 0x20, 0x07, 0x6d, 0x90, 0x0e, 0x76, 0x40, 0x07,
+        0x7a, 0x60, 0x07, 0x74, 0xd0, 0x06, 0xe6, 0x10, 0x07, 0x76, 0xa0, 0x07, 0x73, 0x20, 0x07, 0x6d, 0x60, 0x0e, 0x73, 0x20, 0x07, 0x7a, 0x30, 0x07, 0x72, 0xd0, 0x06, 0xe6, 0x60, 0x07, 0x74, 0xa0,
+        0x07, 0x76, 0x40, 0x07, 0x6d, 0xe0, 0x0e, 0x78, 0xa0, 0x07, 0x71, 0x60, 0x07, 0x7a, 0x30, 0x07, 0x72, 0xa0, 0x07, 0x76, 0x40, 0x07, 0x43, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x86, 0x3c, 0x08, 0x10, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x79, 0x16, 0x20, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0xf2, 0x34,
+        0x40, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, 0x05, 0x02, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x32, 0x1e, 0x98, 0x14, 0x19, 0x11, 0x4c, 0x90, 0x8c, 0x09, 0x26, 0x47,
+        0xc6, 0x04, 0x43, 0x32, 0x25, 0x30, 0x02, 0x50, 0x0c, 0x85, 0x51, 0x08, 0x65, 0x51, 0x20, 0x74, 0x46, 0x00, 0xe8, 0x16, 0x08, 0xcd, 0x19, 0x00, 0xb2, 0x33, 0x00, 0x14, 0x67, 0x00, 0x00, 0x00,
+        0x79, 0x18, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x1a, 0x03, 0x4c, 0x90, 0x46, 0x02, 0x13, 0x44, 0x35, 0x18, 0x63, 0x0b, 0x73, 0x3b, 0x03, 0xb1, 0x2b, 0x93, 0x9b, 0x4b, 0x7b, 0x73, 0x03, 0x99,
+        0x71, 0xb9, 0x01, 0x41, 0xa1, 0x0b, 0x3b, 0x9b, 0x7b, 0x91, 0x2a, 0x62, 0x2a, 0x0a, 0x9a, 0x2a, 0xfa, 0x9a, 0xb9, 0x81, 0x79, 0x31, 0x4b, 0x73, 0x0b, 0x63, 0x4b, 0xd9, 0x10, 0x04, 0x13, 0x04,
+        0x83, 0x98, 0x20, 0x18, 0xc5, 0x06, 0x61, 0x20, 0x26, 0x08, 0x86, 0xb1, 0x41, 0x18, 0x0c, 0x0a, 0x63, 0x73, 0x1b, 0x06, 0xc4, 0x20, 0x26, 0x08, 0xd1, 0x43, 0x60, 0x82, 0x60, 0x1c, 0x13, 0x04,
+        0x03, 0xd9, 0x20, 0x0c, 0xcd, 0x86, 0x84, 0x50, 0x16, 0x82, 0x18, 0x18, 0xc2, 0x99, 0x20, 0x4c, 0xcd, 0x04, 0xc1, 0x48, 0x36, 0x24, 0x03, 0xb4, 0x10, 0xc3, 0x10, 0x11, 0xc0, 0x06, 0xe1, 0x91,
+        0x26, 0x08, 0x96, 0x33, 0x41, 0x38, 0x96, 0x09, 0x82, 0xa1, 0x6c, 0x10, 0x06, 0x6b, 0xc3, 0x42, 0x50, 0x0b, 0x41, 0x0c, 0x4c, 0x55, 0x55, 0xd7, 0x86, 0x00, 0xdb, 0x40, 0x4c, 0x19, 0x00, 0x4c,
+        0x10, 0x04, 0x80, 0x44, 0x5b, 0x58, 0x9a, 0xdb, 0x04, 0xe1, 0x62, 0x36, 0x0c, 0xc3, 0x30, 0x6c, 0x20, 0x88, 0xae, 0xf1, 0x36, 0x14, 0x1b, 0x07, 0x68, 0x5f, 0x15, 0x36, 0x36, 0xbb, 0x36, 0x97,
+        0x34, 0xb2, 0x32, 0x37, 0xba, 0x29, 0x41, 0x50, 0x85, 0x0c, 0xcf, 0xc5, 0xae, 0x4c, 0x6e, 0x2e, 0xed, 0xcd, 0x6d, 0x4a, 0x40, 0x34, 0x21, 0xc3, 0x73, 0xb1, 0x0b, 0x63, 0xb3, 0x2b, 0x93, 0x9b,
+        0x12, 0x18, 0x75, 0xc8, 0xf0, 0x5c, 0xe6, 0xd0, 0xc2, 0xc8, 0xca, 0xe4, 0x9a, 0xde, 0xc8, 0xca, 0xd8, 0xa6, 0x04, 0x48, 0x19, 0x32, 0x3c, 0x17, 0xb9, 0xb2, 0xb9, 0xb7, 0x3a, 0xb9, 0xb1, 0xb2,
+        0xb9, 0x29, 0x41, 0x56, 0x87, 0x0c, 0xcf, 0xa5, 0xcc, 0x8d, 0x4e, 0x2e, 0x0f, 0xea, 0x2d, 0xcd, 0x8d, 0x6e, 0x6e, 0x4a, 0xf0, 0x01, 0x00, 0x00, 0x79, 0x18, 0x00, 0x00, 0x49, 0x00, 0x00, 0x00,
+        0x33, 0x08, 0x80, 0x1c, 0xc4, 0xe1, 0x1c, 0x66, 0x14, 0x01, 0x3d, 0x88, 0x43, 0x38, 0x84, 0xc3, 0x8c, 0x42, 0x80, 0x07, 0x79, 0x78, 0x07, 0x73, 0x98, 0x71, 0x0c, 0xe6, 0x00, 0x0f, 0xed, 0x10,
+        0x0e, 0xf4, 0x80, 0x0e, 0x33, 0x0c, 0x42, 0x1e, 0xc2, 0xc1, 0x1d, 0xce, 0xa1, 0x1c, 0x66, 0x30, 0x05, 0x3d, 0x88, 0x43, 0x38, 0x84, 0x83, 0x1b, 0xcc, 0x03, 0x3d, 0xc8, 0x43, 0x3d, 0x8c, 0x03,
+        0x3d, 0xcc, 0x78, 0x8c, 0x74, 0x70, 0x07, 0x7b, 0x08, 0x07, 0x79, 0x48, 0x87, 0x70, 0x70, 0x07, 0x7a, 0x70, 0x03, 0x76, 0x78, 0x87, 0x70, 0x20, 0x87, 0x19, 0xcc, 0x11, 0x0e, 0xec, 0x90, 0x0e,
+        0xe1, 0x30, 0x0f, 0x6e, 0x30, 0x0f, 0xe3, 0xf0, 0x0e, 0xf0, 0x50, 0x0e, 0x33, 0x10, 0xc4, 0x1d, 0xde, 0x21, 0x1c, 0xd8, 0x21, 0x1d, 0xc2, 0x61, 0x1e, 0x66, 0x30, 0x89, 0x3b, 0xbc, 0x83, 0x3b,
+        0xd0, 0x43, 0x39, 0xb4, 0x03, 0x3c, 0xbc, 0x83, 0x3c, 0x84, 0x03, 0x3b, 0xcc, 0xf0, 0x14, 0x76, 0x60, 0x07, 0x7b, 0x68, 0x07, 0x37, 0x68, 0x87, 0x72, 0x68, 0x07, 0x37, 0x80, 0x87, 0x70, 0x90,
+        0x87, 0x70, 0x60, 0x07, 0x76, 0x28, 0x07, 0x76, 0xf8, 0x05, 0x76, 0x78, 0x87, 0x77, 0x80, 0x87, 0x5f, 0x08, 0x87, 0x71, 0x18, 0x87, 0x72, 0x98, 0x87, 0x79, 0x98, 0x81, 0x2c, 0xee, 0xf0, 0x0e,
+        0xee, 0xe0, 0x0e, 0xf5, 0xc0, 0x0e, 0xec, 0x30, 0x03, 0x62, 0xc8, 0xa1, 0x1c, 0xe4, 0xa1, 0x1c, 0xcc, 0xa1, 0x1c, 0xe4, 0xa1, 0x1c, 0xdc, 0x61, 0x1c, 0xca, 0x21, 0x1c, 0xc4, 0x81, 0x1d, 0xca,
+        0x61, 0x06, 0xd6, 0x90, 0x43, 0x39, 0xc8, 0x43, 0x39, 0x98, 0x43, 0x39, 0xc8, 0x43, 0x39, 0xb8, 0xc3, 0x38, 0x94, 0x43, 0x38, 0x88, 0x03, 0x3b, 0x94, 0xc3, 0x2f, 0xbc, 0x83, 0x3c, 0xfc, 0x82,
+        0x3b, 0xd4, 0x03, 0x3b, 0xb0, 0xc3, 0x8c, 0xc8, 0x21, 0x07, 0x7c, 0x70, 0x03, 0x72, 0x10, 0x87, 0x73, 0x70, 0x03, 0x7b, 0x08, 0x07, 0x79, 0x60, 0x87, 0x70, 0xc8, 0x87, 0x77, 0xa8, 0x07, 0x7a,
+        0x00, 0x00, 0x00, 0x00, 0x71, 0x20, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x26, 0x40, 0x0d, 0x97, 0xef, 0x3c, 0x7e, 0x40, 0x15, 0x05, 0x11, 0x95, 0x0e, 0x30, 0xf8, 0xc8, 0x6d, 0xdb, 0x40, 0x35,
+        0x5c, 0xbe, 0xf3, 0xf8, 0x01, 0x55, 0x14, 0x44, 0xc4, 0x4e, 0x4e, 0x44, 0xf8, 0xc8, 0x6d, 0x5b, 0x80, 0x34, 0x5c, 0xbe, 0xf3, 0xf8, 0x42, 0x44, 0x00, 0x13, 0x11, 0x02, 0xcd, 0xb0, 0x10, 0x06,
+        0x40, 0x30, 0x00, 0xd2, 0x00, 0x00, 0x00, 0x00, 0x61, 0x20, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x13, 0x04, 0x41, 0x2c, 0x10, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x34, 0x46, 0x00, 0x4a,
+        0xa0, 0x3c, 0xc8, 0x14, 0x62, 0x40, 0xc9, 0xcd, 0x00, 0xd4, 0x40, 0x01, 0x02, 0x02, 0x02, 0x22, 0x54, 0x42, 0x29, 0x06, 0x00, 0x00, 0x00, 0x00, 0x23, 0x06, 0x09, 0x00, 0x82, 0x60, 0x80, 0x64,
+        0x46, 0x52, 0x55, 0xcf, 0x88, 0x41, 0x02, 0x80, 0x20, 0x18, 0x20, 0xda, 0xb1, 0x5c, 0x17, 0x34, 0x62, 0x90, 0x00, 0x20, 0x08, 0x06, 0xc8, 0x86, 0x30, 0xd7, 0x15, 0x8d, 0x18, 0x20, 0x00, 0x08,
+        0x82, 0xc1, 0xb2, 0x29, 0xc1, 0x81, 0x8d, 0x26, 0x04, 0xc0, 0x88, 0x01, 0x02, 0x80, 0x20, 0x18, 0x2c, 0x1d, 0x33, 0x20, 0xda, 0x68, 0x42, 0x00, 0x8c, 0x18, 0x20, 0x00, 0x08, 0x82, 0xc1, 0xf2,
+        0x39, 0x46, 0xc2, 0x8c, 0x26, 0x04, 0xc0, 0x88, 0x01, 0x02, 0x80, 0x20, 0x18, 0x2c, 0x61, 0x00, 0x21, 0x9e, 0x33, 0x9a, 0x10, 0x00, 0x23, 0x06, 0x0d, 0x00, 0x82, 0x60, 0xd0, 0x88, 0x01, 0xb3,
+        0x80, 0x01, 0x18, 0x1c, 0xc5, 0x10, 0x4c, 0x08, 0x00, 0x00, 0x00, 0x00,
+    };
+    static const D3D12_SHADER_BYTECODE cs_code = SHADER_BYTECODE(cs_code_dxil);
+
+    static const uint32_t test_data[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
+
+    memset(&rs_desc, 0, sizeof(rs_desc));
+    rs_desc.NumParameters = ARRAY_SIZE(root_params);
+    rs_desc.pParameters = root_params;
+    memset(root_params, 0, sizeof(root_params));
+    root_params[0].ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
+    root_params[0].ParameterType = D3D12_ROOT_PARAMETER_TYPE_UAV;
+    root_params[1].ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
+    root_params[1].ParameterType = D3D12_ROOT_PARAMETER_TYPE_SRV;
+    root_params[2].ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
+    root_params[2].ParameterType = D3D12_ROOT_PARAMETER_TYPE_SRV;
+    root_params[2].Descriptor.ShaderRegister = 1;
+
+
+    if (!init_compute_test_context(&context))
+        return;
+
+    if (!context_supports_dxil(&context))
+    {
+        destroy_test_context(&context);
+        return;
+    }
+
+    input_buffer = create_upload_buffer(context.device, sizeof(test_data), test_data);
+    output_buffer = create_default_buffer(context.device, 16,
+            D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS,
+            D3D12_RESOURCE_STATE_UNORDERED_ACCESS);
+    create_root_signature(context.device, &rs_desc, &root_signature);
+    pso = create_compute_pipeline_state(context.device, root_signature, cs_code);
+    ID3D12GraphicsCommandList_SetPipelineState(context.list, pso);
+    ID3D12GraphicsCommandList_SetComputeRootSignature(context.list, root_signature);
+    ID3D12GraphicsCommandList_SetComputeRootUnorderedAccessView(context.list, 0,
+            ID3D12Resource_GetGPUVirtualAddress(output_buffer));
+    ID3D12GraphicsCommandList_SetComputeRootShaderResourceView(context.list, 1,
+            ID3D12Resource_GetGPUVirtualAddress(input_buffer) + 16);
+    ID3D12GraphicsCommandList_SetComputeRootShaderResourceView(context.list, 2,
+            ID3D12Resource_GetGPUVirtualAddress(input_buffer) + 16);
+    ID3D12GraphicsCommandList_Dispatch(context.list, 1, 1, 1);
+    transition_resource_state(context.list, output_buffer, D3D12_RESOURCE_STATE_UNORDERED_ACCESS, D3D12_RESOURCE_STATE_COPY_SOURCE);
+    get_buffer_readback_with_command_list(output_buffer, DXGI_FORMAT_R32_UINT, &rb, context.queue, context.list);
+
+    for (i = 0; i < 4; i++)
+        values[i] = get_readback_uint(&rb, i, 0, 0);
+
+    skip("Got structured access [-1] = #%x\n", values[0]);
+    skip("Got structured access [1u << 30] = #%x\n", values[1]);
+    skip("Got byte address [-4] = #%x\n", values[2]);
+    skip("Got byte address [0] = #%x\n", values[3]);
+
+    /* Observed on AMD:
+    test_root_descriptor_offset_sign:5262: Test skipped: Got structured access [-1] = #4b416743 <-- Garbage. Likely we accessed garbage memory way out at (4 * UINT_MAX) & UINT_MAX offset.
+    test_root_descriptor_offset_sign:5263: Test skipped: Got structured access [1u << 30] = #4 <-- Suggests 32-bit uint offset.
+    test_root_descriptor_offset_sign:5264: Test skipped: Got byte address [-4] = #0 <-- Suggests we hit robustness for driver generated descriptor.
+    test_root_descriptor_offset_sign:5265: Test skipped: Got byte address [0] = #4
+    */
+
+    /* Observed on NV: Blue screen of death (?!?!). */
+
+    /* Observed on Intel: All 0. Likely faulted and terminated the dispatch before we could write results. */
+
+    ID3D12RootSignature_Release(root_signature);
+    ID3D12PipelineState_Release(pso);
+    ID3D12Resource_Release(input_buffer);
+    ID3D12Resource_Release(output_buffer);
+    release_resource_readback(&rb);
+    destroy_test_context(&context);
+#endif
+}
diff --git a/tests/d3d12_tests.h b/tests/d3d12_tests.h
index 2dbb1879..f86a3a55 100644
--- a/tests/d3d12_tests.h
+++ b/tests/d3d12_tests.h
@@ -306,3 +306,4 @@ decl_test(test_advanced_cbv_layout);
 decl_test(test_shader_waveop_maximal_convergence);
 decl_test(test_uav_3d_sliced_view);
 decl_test(test_pipeline_no_ps_nonzero_rts);
+decl_test(test_root_descriptor_offset_sign);