[GPU] Remove most hardcoded register/instruction layouts from common and D3D12 code

src/xenia/base/bit_field.h

@@ -1,51 +0,0 @@
-/**
- ******************************************************************************
- * Xenia : Xbox 360 Emulator Research Project                                 *
- ******************************************************************************
- * Copyright 2017 Ben Vanik. All rights reserved.                             *
- * Released under the BSD license - see LICENSE in the root for more details. *
- ******************************************************************************
- */
-
-#ifndef XENIA_BASE_BIT_FIELD_H_
-#define XENIA_BASE_BIT_FIELD_H_
-
-#include <cstdint>
-#include <cstdlib>
-#include <type_traits>
-
-namespace xe {
-
-// Bitfield, where position starts at the LSB.
-template <typename T, size_t position, size_t n_bits>
-struct bf {
-  // For enum values, we strip them down to an underlying type.
-  typedef
-      typename std::conditional<std::is_enum<T>::value, std::underlying_type<T>,
-                                std::remove_reference<T>>::type::type
-          value_type;
-
-  bf() = default;
-  inline operator T() const { return value(); }
-
-  inline T value() const {
-    auto value = (storage & mask()) >> position;
-    if (std::is_signed<value_type>::value) {
-      // If the value is signed, sign-extend it.
-      value_type sign_mask = value_type(1) << (n_bits - 1);
-      value = (sign_mask ^ value) - sign_mask;
-    }
-
-    return static_cast<T>(value);
-  }
-
-  inline value_type mask() const {
-    return ((value_type(1) << n_bits) - 1) << position;
-  }
-
-  value_type storage;
-};
-
-}  // namespace xe
-
-#endif  // XENIA_BASE_BIT_FIELD_H_