fixes: texture unit mem access sometimes going to smem, bilinear texture filtering; new: cache req_id,

sim/simX/tex_unit.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "types.h"
+
+namespace vortex {
+
+class Core;
+
+class TexUnit {
+public:
+    TexUnit(Core* core);
+    ~TexUnit();
+
+    uint32_t get_state(uint32_t state);
+  
+    void set_state(uint32_t state, uint32_t value);
+
+    uint32_t read(int32_t u, int32_t v, int32_t lod, std::vector<uint64_t>* mem_addrs);
+
+private:
+
+    std::array<uint32_t, NUM_TEX_STATES> states_;
+    Core* core_;
+};
+
+}