kepler_compute: Fixup assert and rename engines

When I originally added the compute assert I used the wrong
documentation. This addresses that.

The dispatch register was tested with homebrew against hardware and is
triggered by some games (e.g. Super Mario Odyssey). What exactly is
missing to get a valid program bound by this engine requires more
investigation.

src/video_core/engines/kepler_compute.h

@@ -0,0 +1,58 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include "common/assert.h"
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+namespace Tegra::Engines {
+
+#define KEPLER_COMPUTE_REG_INDEX(field_name)                                                       \
+    (offsetof(Tegra::Engines::KeplerCompute::Regs, field_name) / sizeof(u32))
+
+class KeplerCompute final {
+public:
+    explicit KeplerCompute(MemoryManager& memory_manager);
+    ~KeplerCompute();
+
+    static constexpr std::size_t NumConstBuffers = 8;
+
+    struct Regs {
+        static constexpr std::size_t NUM_REGS = 0xCF8;
+
+        union {
+            struct {
+                INSERT_PADDING_WORDS(0xAF);
+
+                u32 launch;
+
+                INSERT_PADDING_WORDS(0xC48);
+            };
+            std::array<u32, NUM_REGS> reg_array;
+        };
+    } regs{};
+    static_assert(sizeof(Regs) == Regs::NUM_REGS * sizeof(u32),
+                  "KeplerCompute Regs has wrong size");
+
+    MemoryManager& memory_manager;
+
+    /// Write the value to the register identified by method.
+    void CallMethod(const GPU::MethodCall& method_call);
+};
+
+#define ASSERT_REG_POSITION(field_name, position)                                                  \
+    static_assert(offsetof(KeplerCompute::Regs, field_name) == position * 4,                       \
+                  "Field " #field_name " has invalid position")
+
+ASSERT_REG_POSITION(launch, 0xAF);
+
+#undef ASSERT_REG_POSITION
+
+} // namespace Tegra::Engines