Hook up vertex shaders to shader cache

include/PICA/pica_vert_config.hpp

@@ -0,0 +1,31 @@
+#pragma once
+#include <array>
+#include <cstring>
+#include <type_traits>
+#include <unordered_map>
+
+#include "PICA/pica_hash.hpp"
+#include "PICA/regs.hpp"
+#include "bitfield.hpp"
+#include "helpers.hpp"
+
+namespace PICA {
+	// Configuration struct used 
+	struct VertConfig {
+		PICAHash::HashType shaderHash;
+		PICAHash::HashType opdescHash;
+		u32 entrypoint;
+		bool usingUbershader;
+
+		bool operator==(const VertConfig& config) const {
+			// Hash function and equality operator required by std::unordered_map
+			return std::memcmp(this, &config, sizeof(VertConfig)) == 0;
+		}
+	};
+}  // namespace PICA
+
+// Override std::hash for our vertex config class
+template <>
+struct std::hash<PICA::VertConfig> {
+	std::size_t operator()(const PICA::VertConfig& config) const noexcept { return PICAHash::computeHash((const char*)&config, sizeof(config)); }
+};