diff --git a/src/xenia/gpu/command_processor.cc b/src/xenia/gpu/command_processor.cc
index ced5a53db..4d0ee3378 100644
--- a/src/xenia/gpu/command_processor.cc
+++ b/src/xenia/gpu/command_processor.cc
@@ -941,7 +941,7 @@ bool CommandProcessor::ExecutePacketType3_EVENT_WRITE_EXT(
       0,          // min z
       1,          // max z
   };
-  assert_true(endianness == xenos::Endian::k8in16);
+  assert_true(endianness == Endian::k8in16);
   xe::copy_and_swap_16_aligned(
       reinterpret_cast<uint16_t*>(memory_->TranslatePhysical(address)), extents,
       xe::countof(extents));
diff --git a/src/xenia/gpu/command_processor.h b/src/xenia/gpu/command_processor.h
index 55e0a4d12..0d20bdecd 100644
--- a/src/xenia/gpu/command_processor.h
+++ b/src/xenia/gpu/command_processor.h
@@ -95,8 +95,8 @@ class CommandProcessor {
   class RingbufferReader;
 
   struct IndexBufferInfo {
-    xenos::IndexFormat format = xenos::IndexFormat::kInt16;
-    xenos::Endian endianness = xenos::Endian::kUnspecified;
+    IndexFormat format = IndexFormat::kInt16;
+    Endian endianness = Endian::kUnspecified;
     uint32_t count = 0;
     uint32_t guest_base = 0;
     size_t length = 0;
diff --git a/src/xenia/gpu/gl4/draw_batcher.h b/src/xenia/gpu/gl4/draw_batcher.h
index 87657c2fb..5c83d73e1 100644
--- a/src/xenia/gpu/gl4/draw_batcher.h
+++ b/src/xenia/gpu/gl4/draw_batcher.h
@@ -90,7 +90,7 @@ class DrawBatcher {
 
   bool BeginDrawArrays(PrimitiveType prim_type, uint32_t index_count);
   bool BeginDrawElements(PrimitiveType prim_type, uint32_t index_count,
-                         xenos::IndexFormat index_format);
+                         IndexFormat index_format);
   void DiscardDraw();
   bool CommitDraw();
   bool Flush(FlushMode mode);
diff --git a/src/xenia/gpu/gl4/gl4_command_processor.h b/src/xenia/gpu/gl4/gl4_command_processor.h
index 14b031b60..699bab8ff 100644
--- a/src/xenia/gpu/gl4/gl4_command_processor.h
+++ b/src/xenia/gpu/gl4/gl4_command_processor.h
@@ -50,12 +50,10 @@ class GL4CommandProcessor : public CommandProcessor {
   // HACK: for debugging; would be good to have this in a base type.
   TextureCache* texture_cache() { return &texture_cache_; }
 
-  GLuint GetColorRenderTarget(uint32_t pitch, xenos::MsaaSamples samples,
-                              uint32_t base,
-                              xenos::ColorRenderTargetFormat format);
-  GLuint GetDepthRenderTarget(uint32_t pitch, xenos::MsaaSamples samples,
-                              uint32_t base,
-                              xenos::DepthRenderTargetFormat format);
+  GLuint GetColorRenderTarget(uint32_t pitch, MsaaSamples samples,
+                              uint32_t base, ColorRenderTargetFormat format);
+  GLuint GetDepthRenderTarget(uint32_t pitch, MsaaSamples samples,
+                              uint32_t base, DepthRenderTargetFormat format);
 
  private:
   enum class UpdateStatus {
@@ -73,14 +71,14 @@ class GL4CommandProcessor : public CommandProcessor {
     uint32_t base;
     uint32_t width;
     uint32_t height;
-    xenos::ColorRenderTargetFormat format;
+    ColorRenderTargetFormat format;
     GLuint texture;
   };
   struct CachedDepthRenderTarget {
     uint32_t base;
     uint32_t width;
     uint32_t height;
-    xenos::DepthRenderTargetFormat format;
+    DepthRenderTargetFormat format;
     GLuint texture;
   };
   struct CachedPipeline {
diff --git a/src/xenia/gpu/gl4/gl4_shader.cc b/src/xenia/gpu/gl4/gl4_shader.cc
index 16875c1ba..66230c7e9 100644
--- a/src/xenia/gpu/gl4/gl4_shader.cc
+++ b/src/xenia/gpu/gl4/gl4_shader.cc
@@ -20,8 +20,6 @@ namespace xe {
 namespace gpu {
 namespace gl4 {
 
-using xe::gpu::xenos::VertexFormat;
-
 GL4Shader::GL4Shader(ShaderType shader_type, uint64_t data_hash,
                      const uint32_t* dword_ptr, uint32_t dword_count)
     : Shader(shader_type, data_hash, dword_ptr, dword_count),
@@ -133,7 +131,7 @@ bool GL4Shader::PrepareVertexArrayObject() {
 
     for (uint32_t i = 0; i < desc.element_count; ++i, ++el_index) {
       const auto& el = desc.elements[i];
-      auto comp_count = GetVertexFormatComponentCount(el.format);
+      auto comp_count = xenos::GetVertexFormatComponentCount(el.format);
       GLenum comp_type;
       switch (el.format) {
         case VertexFormat::k_8_8_8_8:
diff --git a/src/xenia/gpu/gl4/gl4_shader_translator.cc b/src/xenia/gpu/gl4/gl4_shader_translator.cc
index c72a738f4..9920c1681 100644
--- a/src/xenia/gpu/gl4/gl4_shader_translator.cc
+++ b/src/xenia/gpu/gl4/gl4_shader_translator.cc
@@ -20,9 +20,7 @@ namespace xe {
 namespace gpu {
 namespace gl4 {
 
-using namespace xe::gpu::ucode;
-
-using xe::gpu::xenos::VertexFormat;
+using namespace xe::gpu::gl4::ucode;
 
 #define Append(...) output_.AppendFormat(__VA_ARGS__)
 
diff --git a/src/xenia/gpu/gl4/texture_cache.cc b/src/xenia/gpu/gl4/texture_cache.cc
index 26297110c..d54ae3318 100644
--- a/src/xenia/gpu/gl4/texture_cache.cc
+++ b/src/xenia/gpu/gl4/texture_cache.cc
@@ -23,8 +23,6 @@ namespace xe {
 namespace gpu {
 namespace gl4 {
 
-using xe::gpu::xenos::Endian;
-
 struct TextureConfig {
   TextureFormat texture_format;
   GLenum internal_format;
@@ -296,25 +294,25 @@ TextureCache::SamplerEntry* TextureCache::LookupOrInsertSampler(
       GL_MIRROR_CLAMP_TO_BORDER_EXT,  //
   };
   glSamplerParameteri(entry->handle, GL_TEXTURE_WRAP_S,
-                      wrap_map[sampler_info.clamp_u]);
+                      wrap_map[static_cast<int>(sampler_info.clamp_u)]);
   glSamplerParameteri(entry->handle, GL_TEXTURE_WRAP_T,
-                      wrap_map[sampler_info.clamp_v]);
+                      wrap_map[static_cast<int>(sampler_info.clamp_v)]);
   glSamplerParameteri(entry->handle, GL_TEXTURE_WRAP_R,
-                      wrap_map[sampler_info.clamp_w]);
+                      wrap_map[static_cast<int>(sampler_info.clamp_w)]);
 
   // Texture level filtering.
   GLenum min_filter;
   switch (sampler_info.min_filter) {
-    case ucode::TEX_FILTER_POINT:
+    case TextureFilter::kPoint:
       switch (sampler_info.mip_filter) {
-        case ucode::TEX_FILTER_BASEMAP:
+        case TextureFilter::kBaseMap:
           min_filter = GL_NEAREST;
           break;
-        case ucode::TEX_FILTER_POINT:
+        case TextureFilter::kPoint:
           // min_filter = GL_NEAREST_MIPMAP_NEAREST;
           min_filter = GL_NEAREST;
           break;
-        case ucode::TEX_FILTER_LINEAR:
+        case TextureFilter::kLinear:
           // min_filter = GL_NEAREST_MIPMAP_LINEAR;
           min_filter = GL_NEAREST;
           break;
@@ -323,16 +321,16 @@ TextureCache::SamplerEntry* TextureCache::LookupOrInsertSampler(
           return nullptr;
       }
       break;
-    case ucode::TEX_FILTER_LINEAR:
+    case TextureFilter::kLinear:
       switch (sampler_info.mip_filter) {
-        case ucode::TEX_FILTER_BASEMAP:
+        case TextureFilter::kBaseMap:
           min_filter = GL_LINEAR;
           break;
-        case ucode::TEX_FILTER_POINT:
+        case TextureFilter::kPoint:
           // min_filter = GL_LINEAR_MIPMAP_NEAREST;
           min_filter = GL_LINEAR;
           break;
-        case ucode::TEX_FILTER_LINEAR:
+        case TextureFilter::kLinear:
           // min_filter = GL_LINEAR_MIPMAP_LINEAR;
           min_filter = GL_LINEAR;
           break;
@@ -347,10 +345,10 @@ TextureCache::SamplerEntry* TextureCache::LookupOrInsertSampler(
   }
   GLenum mag_filter;
   switch (sampler_info.mag_filter) {
-    case ucode::TEX_FILTER_POINT:
+    case TextureFilter::kPoint:
       mag_filter = GL_NEAREST;
       break;
-    case ucode::TEX_FILTER_LINEAR:
+    case TextureFilter::kLinear:
       mag_filter = GL_LINEAR;
       break;
     default:
@@ -362,22 +360,22 @@ TextureCache::SamplerEntry* TextureCache::LookupOrInsertSampler(
 
   GLfloat aniso;
   switch (sampler_info.aniso_filter) {
-    case ucode::ANISO_FILTER_DISABLED:
+    case AnisoFilter::kDisabled:
       aniso = 0.0f;
       break;
-    case ucode::ANISO_FILTER_MAX_1_1:
+    case AnisoFilter::kMax_1_1:
       aniso = 1.0f;
       break;
-    case ucode::ANISO_FILTER_MAX_2_1:
+    case AnisoFilter::kMax_2_1:
       aniso = 2.0f;
       break;
-    case ucode::ANISO_FILTER_MAX_4_1:
+    case AnisoFilter::kMax_4_1:
       aniso = 4.0f;
       break;
-    case ucode::ANISO_FILTER_MAX_8_1:
+    case AnisoFilter::kMax_8_1:
       aniso = 8.0f;
       break;
-    case ucode::ANISO_FILTER_MAX_16_1:
+    case AnisoFilter::kMax_16_1:
       aniso = 16.0f;
       break;
     default:
diff --git a/src/xenia/gpu/gl4/ucode.h b/src/xenia/gpu/gl4/ucode.h
new file mode 100644
index 000000000..d8d6fb87e
--- /dev/null
+++ b/src/xenia/gpu/gl4/ucode.h
@@ -0,0 +1,549 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_GPU_GL4_UCODE_H_
+#define XENIA_GPU_GL4_UCODE_H_
+
+#include <cstdint>
+
+#include "xenia/base/assert.h"
+#include "xenia/base/platform.h"
+#include "xenia/gpu/xenos.h"
+
+// Closest AMD doc:
+// http://developer.amd.com/wordpress/media/2012/10/R600_Instruction_Set_Architecture.pdf
+// Microcode format differs, but most fields/enums are the same.
+
+// This code comes from the freedreno project:
+// https://github.com/freedreno/freedreno/blob/master/includes/instr-a2xx.h
+/*
+ * Copyright (c) 2012 Rob Clark <robdclark@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+namespace xe {
+namespace gpu {
+namespace gl4 {
+namespace ucode {
+
+enum a2xx_sq_surfaceformat {
+  FMT_1_REVERSE = 0,
+  FMT_1 = 1,
+  FMT_8 = 2,
+  FMT_1_5_5_5 = 3,
+  FMT_5_6_5 = 4,
+  FMT_6_5_5 = 5,
+  FMT_8_8_8_8 = 6,
+  FMT_2_10_10_10 = 7,
+  FMT_8_A = 8,
+  FMT_8_B = 9,
+  FMT_8_8 = 10,
+  FMT_Cr_Y1_Cb_Y0 = 11,
+  FMT_Y1_Cr_Y0_Cb = 12,
+  FMT_5_5_5_1 = 13,
+  FMT_8_8_8_8_A = 14,
+  FMT_4_4_4_4 = 15,
+  FMT_10_11_11 = 16,
+  FMT_11_11_10 = 17,
+  FMT_DXT1 = 18,
+  FMT_DXT2_3 = 19,
+  FMT_DXT4_5 = 20,
+  FMT_24_8 = 22,
+  FMT_24_8_FLOAT = 23,
+  FMT_16 = 24,
+  FMT_16_16 = 25,
+  FMT_16_16_16_16 = 26,
+  FMT_16_EXPAND = 27,
+  FMT_16_16_EXPAND = 28,
+  FMT_16_16_16_16_EXPAND = 29,
+  FMT_16_FLOAT = 30,
+  FMT_16_16_FLOAT = 31,
+  FMT_16_16_16_16_FLOAT = 32,
+  FMT_32 = 33,
+  FMT_32_32 = 34,
+  FMT_32_32_32_32 = 35,
+  FMT_32_FLOAT = 36,
+  FMT_32_32_FLOAT = 37,
+  FMT_32_32_32_32_FLOAT = 38,
+  FMT_32_AS_8 = 39,
+  FMT_32_AS_8_8 = 40,
+  FMT_16_MPEG = 41,
+  FMT_16_16_MPEG = 42,
+  FMT_8_INTERLACED = 43,
+  FMT_32_AS_8_INTERLACED = 44,
+  FMT_32_AS_8_8_INTERLACED = 45,
+  FMT_16_INTERLACED = 46,
+  FMT_16_MPEG_INTERLACED = 47,
+  FMT_16_16_MPEG_INTERLACED = 48,
+  FMT_DXN = 49,
+  FMT_8_8_8_8_AS_16_16_16_16 = 50,
+  FMT_DXT1_AS_16_16_16_16 = 51,
+  FMT_DXT2_3_AS_16_16_16_16 = 52,
+  FMT_DXT4_5_AS_16_16_16_16 = 53,
+  FMT_2_10_10_10_AS_16_16_16_16 = 54,
+  FMT_10_11_11_AS_16_16_16_16 = 55,
+  FMT_11_11_10_AS_16_16_16_16 = 56,
+  FMT_32_32_32_FLOAT = 57,
+  FMT_DXT3A = 58,
+  FMT_DXT5A = 59,
+  FMT_CTX1 = 60,
+  FMT_DXT3A_AS_1_1_1_1 = 61,
+};
+
+/*
+ * ALU instructions:
+ */
+
+typedef enum {
+  ADDs = 0,
+  ADD_PREVs = 1,
+  MULs = 2,
+  MUL_PREVs = 3,
+  MUL_PREV2s = 4,
+  MAXs = 5,
+  MINs = 6,
+  SETEs = 7,
+  SETGTs = 8,
+  SETGTEs = 9,
+  SETNEs = 10,
+  FRACs = 11,
+  TRUNCs = 12,
+  FLOORs = 13,
+  EXP_IEEE = 14,
+  LOG_CLAMP = 15,
+  LOG_IEEE = 16,
+  RECIP_CLAMP = 17,
+  RECIP_FF = 18,
+  RECIP_IEEE = 19,
+  RECIPSQ_CLAMP = 20,
+  RECIPSQ_FF = 21,
+  RECIPSQ_IEEE = 22,
+  MOVAs = 23,
+  MOVA_FLOORs = 24,
+  SUBs = 25,
+  SUB_PREVs = 26,
+  PRED_SETEs = 27,
+  PRED_SETNEs = 28,
+  PRED_SETGTs = 29,
+  PRED_SETGTEs = 30,
+  PRED_SET_INVs = 31,
+  PRED_SET_POPs = 32,
+  PRED_SET_CLRs = 33,
+  PRED_SET_RESTOREs = 34,
+  KILLEs = 35,
+  KILLGTs = 36,
+  KILLGTEs = 37,
+  KILLNEs = 38,
+  KILLONEs = 39,
+  SQRT_IEEE = 40,
+  MUL_CONST_0 = 42,
+  MUL_CONST_1 = 43,
+  ADD_CONST_0 = 44,
+  ADD_CONST_1 = 45,
+  SUB_CONST_0 = 46,
+  SUB_CONST_1 = 47,
+  SIN = 48,
+  COS = 49,
+  RETAIN_PREV = 50,
+} instr_scalar_opc_t;
+
+typedef enum {
+  ADDv = 0,
+  MULv = 1,
+  MAXv = 2,
+  MINv = 3,
+  SETEv = 4,
+  SETGTv = 5,
+  SETGTEv = 6,
+  SETNEv = 7,
+  FRACv = 8,
+  TRUNCv = 9,
+  FLOORv = 10,
+  MULADDv = 11,
+  CNDEv = 12,
+  CNDGTEv = 13,
+  CNDGTv = 14,
+  DOT4v = 15,
+  DOT3v = 16,
+  DOT2ADDv = 17,
+  CUBEv = 18,
+  MAX4v = 19,
+  PRED_SETE_PUSHv = 20,
+  PRED_SETNE_PUSHv = 21,
+  PRED_SETGT_PUSHv = 22,
+  PRED_SETGTE_PUSHv = 23,
+  KILLEv = 24,
+  KILLGTv = 25,
+  KILLGTEv = 26,
+  KILLNEv = 27,
+  DSTv = 28,
+  MOVAv = 29,
+} instr_vector_opc_t;
+
+XEPACKEDSTRUCT(instr_alu_t, {
+  /* dword0: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t vector_dest : 6;
+    uint32_t vector_dest_rel : 1;
+    uint32_t abs_constants : 1;
+    uint32_t scalar_dest : 6;
+    uint32_t scalar_dest_rel : 1;
+    uint32_t export_data : 1;
+    uint32_t vector_write_mask : 4;
+    uint32_t scalar_write_mask : 4;
+    uint32_t vector_clamp : 1;
+    uint32_t scalar_clamp : 1;
+    uint32_t scalar_opc : 6;  // instr_scalar_opc_t
+  });
+  /* dword1: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t src3_swiz : 8;
+    uint32_t src2_swiz : 8;
+    uint32_t src1_swiz : 8;
+    uint32_t src3_reg_negate : 1;
+    uint32_t src2_reg_negate : 1;
+    uint32_t src1_reg_negate : 1;
+    uint32_t pred_condition : 1;
+    uint32_t pred_select : 1;
+    uint32_t relative_addr : 1;
+    uint32_t const_1_rel_abs : 1;
+    uint32_t const_0_rel_abs : 1;
+  });
+  /* dword2: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t src3_reg : 8;
+    uint32_t src2_reg : 8;
+    uint32_t src1_reg : 8;
+    uint32_t vector_opc : 5;  // instr_vector_opc_t
+    uint32_t src3_sel : 1;
+    uint32_t src2_sel : 1;
+    uint32_t src1_sel : 1;
+  });
+});
+
+/*
+ * CF instructions:
+ */
+
+typedef enum {
+  NOP = 0,
+  EXEC = 1,
+  EXEC_END = 2,
+  COND_EXEC = 3,
+  COND_EXEC_END = 4,
+  COND_PRED_EXEC = 5,
+  COND_PRED_EXEC_END = 6,
+  LOOP_START = 7,
+  LOOP_END = 8,
+  COND_CALL = 9,
+  RETURN = 10,
+  COND_JMP = 11,
+  ALLOC = 12,
+  COND_EXEC_PRED_CLEAN = 13,
+  COND_EXEC_PRED_CLEAN_END = 14,
+  MARK_VS_FETCH_DONE = 15,
+} instr_cf_opc_t;
+
+typedef enum {
+  RELATIVE_ADDR = 0,
+  ABSOLUTE_ADDR = 1,
+} instr_addr_mode_t;
+
+typedef enum {
+  SQ_NO_ALLOC = 0,
+  SQ_POSITION = 1,
+  SQ_PARAMETER_PIXEL = 2,
+  SQ_MEMORY = 3,
+} instr_alloc_type_t;
+
+XEPACKEDSTRUCT(instr_cf_exec_t, {
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t address : 12;
+    uint32_t count : 3;
+    uint32_t yeild : 1;
+    uint32_t serialize : 12;
+    uint32_t vc_hi : 4;
+  });
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t vc_lo : 2; /* vertex cache? */
+    uint32_t bool_addr : 8;
+    uint32_t pred_condition : 1;
+    uint32_t address_mode : 1;  // instr_addr_mode_t
+    uint32_t opc : 4;           // instr_cf_opc_t
+  });
+  bool is_cond_exec() const {
+    return (this->opc == COND_EXEC) || (this->opc == COND_EXEC_END) ||
+           (this->opc == COND_PRED_EXEC) || (this->opc == COND_PRED_EXEC_END) ||
+           (this->opc == COND_EXEC_PRED_CLEAN) ||
+           (this->opc == COND_EXEC_PRED_CLEAN_END);
+  }
+});
+
+XEPACKEDSTRUCT(instr_cf_loop_t, {
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t address : 13;
+    uint32_t repeat : 1;
+    uint32_t reserved0 : 2;
+    uint32_t loop_id : 5;
+    uint32_t pred_break : 1;
+    uint32_t reserved1_hi : 10;
+  });
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t reserved1_lo : 10;
+    uint32_t condition : 1;
+    uint32_t address_mode : 1;  // instr_addr_mode_t
+    uint32_t opc : 4;           // instr_cf_opc_t
+  });
+});
+
+XEPACKEDSTRUCT(instr_cf_jmp_call_t, {
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t address : 13;
+    uint32_t force_call : 1;
+    uint32_t predicated_jmp : 1;
+    uint32_t reserved1_hi : 17;
+  });
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t reserved1_lo : 1;
+    uint32_t direction : 1;
+    uint32_t bool_addr : 8;
+    uint32_t condition : 1;
+    uint32_t address_mode : 1;  // instr_addr_mode_t
+    uint32_t opc : 4;           // instr_cf_opc_t
+  });
+});
+
+XEPACKEDSTRUCT(instr_cf_alloc_t, {
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t size : 3;
+    uint32_t reserved0_hi : 29;
+  });
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t reserved0_lo : 8;
+    uint32_t no_serial : 1;
+    uint32_t buffer_select : 2;  // instr_alloc_type_t
+    uint32_t alloc_mode : 1;
+    uint32_t opc : 4;  // instr_cf_opc_t
+  });
+});
+
+XEPACKEDUNION(instr_cf_t, {
+  instr_cf_exec_t exec;
+  instr_cf_loop_t loop;
+  instr_cf_jmp_call_t jmp_call;
+  instr_cf_alloc_t alloc;
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t:
+      32;
+    uint32_t:
+      12;
+      uint32_t opc : 4;  // instr_cf_opc_t
+  });
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t dword_0;
+    uint32_t dword_1;
+  });
+
+  bool is_exec() const {
+    return (this->opc == EXEC) || (this->opc == EXEC_END) ||
+           (this->opc == COND_EXEC) || (this->opc == COND_EXEC_END) ||
+           (this->opc == COND_PRED_EXEC) || (this->opc == COND_PRED_EXEC_END) ||
+           (this->opc == COND_EXEC_PRED_CLEAN) ||
+           (this->opc == COND_EXEC_PRED_CLEAN_END);
+  }
+  bool is_cond_exec() const {
+    return (this->opc == COND_EXEC) || (this->opc == COND_EXEC_END) ||
+           (this->opc == COND_PRED_EXEC) || (this->opc == COND_PRED_EXEC_END) ||
+           (this->opc == COND_EXEC_PRED_CLEAN) ||
+           (this->opc == COND_EXEC_PRED_CLEAN_END);
+  }
+});
+
+/*
+ * FETCH instructions:
+ */
+
+typedef enum {
+  VTX_FETCH = 0,
+  TEX_FETCH = 1,
+  TEX_GET_BORDER_COLOR_FRAC = 16,
+  TEX_GET_COMP_TEX_LOD = 17,
+  TEX_GET_GRADIENTS = 18,
+  TEX_GET_WEIGHTS = 19,
+  TEX_SET_TEX_LOD = 24,
+  TEX_SET_GRADIENTS_H = 25,
+  TEX_SET_GRADIENTS_V = 26,
+  TEX_RESERVED_4 = 27,
+} instr_fetch_opc_t;
+
+typedef enum {
+  TEX_FILTER_POINT = 0,
+  TEX_FILTER_LINEAR = 1,
+  TEX_FILTER_BASEMAP = 2, /* only applicable for mip-filter */
+  TEX_FILTER_USE_FETCH_CONST = 3,
+} instr_tex_filter_t;
+
+typedef enum {
+  ANISO_FILTER_DISABLED = 0,
+  ANISO_FILTER_MAX_1_1 = 1,
+  ANISO_FILTER_MAX_2_1 = 2,
+  ANISO_FILTER_MAX_4_1 = 3,
+  ANISO_FILTER_MAX_8_1 = 4,
+  ANISO_FILTER_MAX_16_1 = 5,
+  ANISO_FILTER_USE_FETCH_CONST = 7,
+} instr_aniso_filter_t;
+
+typedef enum {
+  ARBITRARY_FILTER_2X4_SYM = 0,
+  ARBITRARY_FILTER_2X4_ASYM = 1,
+  ARBITRARY_FILTER_4X2_SYM = 2,
+  ARBITRARY_FILTER_4X2_ASYM = 3,
+  ARBITRARY_FILTER_4X4_SYM = 4,
+  ARBITRARY_FILTER_4X4_ASYM = 5,
+  ARBITRARY_FILTER_USE_FETCH_CONST = 7,
+} instr_arbitrary_filter_t;
+
+typedef enum {
+  SAMPLE_CENTROID = 0,
+  SAMPLE_CENTER = 1,
+} instr_sample_loc_t;
+
+typedef enum {
+  DIMENSION_1D = 0,
+  DIMENSION_2D = 1,
+  DIMENSION_3D = 2,
+  DIMENSION_CUBE = 3,
+} instr_dimension_t;
+
+typedef enum a2xx_sq_surfaceformat instr_surf_fmt_t;
+
+XEPACKEDSTRUCT(instr_fetch_tex_t, {
+  /* dword0: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t opc : 5;  // instr_fetch_opc_t
+    uint32_t src_reg : 6;
+    uint32_t src_reg_am : 1;
+    uint32_t dst_reg : 6;
+    uint32_t dst_reg_am : 1;
+    uint32_t fetch_valid_only : 1;
+    uint32_t const_idx : 5;
+    uint32_t tx_coord_denorm : 1;
+    uint32_t src_swiz : 6;  // xyz
+  });
+  /* dword1: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t dst_swiz : 12;         // xyzw
+    uint32_t mag_filter : 2;        // instr_tex_filter_t
+    uint32_t min_filter : 2;        // instr_tex_filter_t
+    uint32_t mip_filter : 2;        // instr_tex_filter_t
+    uint32_t aniso_filter : 3;      // instr_aniso_filter_t
+    uint32_t arbitrary_filter : 3;  // instr_arbitrary_filter_t
+    uint32_t vol_mag_filter : 2;    // instr_tex_filter_t
+    uint32_t vol_min_filter : 2;    // instr_tex_filter_t
+    uint32_t use_comp_lod : 1;
+    uint32_t use_reg_lod : 1;
+    uint32_t unk : 1;
+    uint32_t pred_select : 1;
+  });
+  /* dword2: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t use_reg_gradients : 1;
+    uint32_t sample_location : 1;  // instr_sample_loc_t
+    uint32_t lod_bias : 7;
+    uint32_t unused : 5;
+    uint32_t dimension : 2;  // instr_dimension_t
+    uint32_t offset_x : 5;
+    uint32_t offset_y : 5;
+    uint32_t offset_z : 5;
+    uint32_t pred_condition : 1;
+  });
+});
+
+XEPACKEDSTRUCT(instr_fetch_vtx_t, {
+  /* dword0: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t opc : 5;  // instr_fetch_opc_t
+    uint32_t src_reg : 6;
+    uint32_t src_reg_am : 1;
+    uint32_t dst_reg : 6;
+    uint32_t dst_reg_am : 1;
+    uint32_t must_be_one : 1;
+    uint32_t const_index : 5;
+    uint32_t const_index_sel : 2;
+    uint32_t reserved0 : 3;
+    uint32_t src_swiz : 2;
+  });
+  /* dword1: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t dst_swiz : 12;
+    uint32_t format_comp_all : 1; /* '1' for signed, '0' for unsigned? */
+    uint32_t num_format_all : 1;  /* '0' for normalized, '1' for unnormalized */
+    uint32_t signed_rf_mode_all : 1;
+    uint32_t reserved1 : 1;
+    uint32_t format : 6;  // instr_surf_fmt_t
+    uint32_t reserved2 : 1;
+    uint32_t exp_adjust_all : 7;
+    uint32_t reserved3 : 1;
+    uint32_t pred_select : 1;
+  });
+  /* dword2: */
+  XEPACKEDSTRUCTANONYMOUS({
+    uint32_t stride : 8;
+    uint32_t offset : 23;
+    uint32_t pred_condition : 1;
+  });
+});
+
+XEPACKEDUNION(instr_fetch_t, {
+  instr_fetch_tex_t tex;
+  instr_fetch_vtx_t vtx;
+  XEPACKEDSTRUCTANONYMOUS({
+    /* dword0: */
+    XEPACKEDSTRUCTANONYMOUS({
+      uint32_t opc : 5;  // instr_fetch_opc_t
+    uint32_t:
+      27;
+    });
+    /* dword1: */
+    XEPACKEDSTRUCTANONYMOUS({
+      uint32_t:
+        32;
+    });
+    /* dword2: */
+    XEPACKEDSTRUCTANONYMOUS({
+      uint32_t:
+        32;
+    });
+  });
+});
+
+}  // namespace ucode
+}  // namespace gl4
+}  // namespace gpu
+}  // namespace xe
+
+#endif  // XENIA_GPU_GL4_UCODE_H_
diff --git a/src/xenia/gpu/ucode_disassembler.cc b/src/xenia/gpu/gl4/ucode_disassembler.cc
similarity index 99%
rename from src/xenia/gpu/ucode_disassembler.cc
rename to src/xenia/gpu/gl4/ucode_disassembler.cc
index b2332829f..2726f6594 100644
--- a/src/xenia/gpu/ucode_disassembler.cc
+++ b/src/xenia/gpu/gl4/ucode_disassembler.cc
@@ -30,7 +30,7 @@
  * SOFTWARE.
  */
 
-#include "xenia/gpu/ucode_disassembler.h"
+#include "xenia/gpu/gl4/ucode_disassembler.h"
 
 #include <cstdint>
 #include <cstdio>
@@ -39,11 +39,13 @@
 
 #include "xenia/base/assert.h"
 #include "xenia/base/string_buffer.h"
+#include "xenia/gpu/gl4/ucode.h"
 
 namespace xe {
 namespace gpu {
+namespace gl4 {
 
-using namespace xe::gpu::ucode;
+using namespace xe::gpu::gl4::ucode;
 using namespace xe::gpu::xenos;
 
 static const char* levels[] = {
@@ -773,5 +775,6 @@ std::string DisassembleShader(ShaderType type, const uint32_t* dwords,
   return string_buffer.to_string();
 }
 
+}  // namespace gl4
 }  // namespace gpu
 }  // namespace xe
diff --git a/src/xenia/gpu/ucode_disassembler.h b/src/xenia/gpu/gl4/ucode_disassembler.h
similarity index 81%
rename from src/xenia/gpu/ucode_disassembler.h
rename to src/xenia/gpu/gl4/ucode_disassembler.h
index 22d09eb09..834a229f1 100644
--- a/src/xenia/gpu/ucode_disassembler.h
+++ b/src/xenia/gpu/gl4/ucode_disassembler.h
@@ -7,21 +7,22 @@
  ******************************************************************************
  */
 
-#ifndef XENIA_GPU_UCODE_DISASSEMBLER_H_
-#define XENIA_GPU_UCODE_DISASSEMBLER_H_
+#ifndef XENIA_GPU_GL4_UCODE_DISASSEMBLER_H_
+#define XENIA_GPU_GL4_UCODE_DISASSEMBLER_H_
 
 #include <string>
 
-#include "xenia/gpu/ucode.h"
 #include "xenia/gpu/xenos.h"
 
 namespace xe {
 namespace gpu {
+namespace gl4 {
 
 std::string DisassembleShader(ShaderType type, const uint32_t* dwords,
                               size_t dword_count);
 
+}  // namespace gl4
 }  // namespace gpu
 }  // namespace xe
 
-#endif  // XENIA_GPU_UCODE_DISASSEMBLER_H_
+#endif  // XENIA_GPU_GL4_UCODE_DISASSEMBLER_H_
diff --git a/src/xenia/gpu/sampler_info.cc b/src/xenia/gpu/sampler_info.cc
index 16b790d50..c11ecccab 100644
--- a/src/xenia/gpu/sampler_info.cc
+++ b/src/xenia/gpu/sampler_info.cc
@@ -18,20 +18,20 @@ namespace xe {
 namespace gpu {
 
 bool SamplerInfo::Prepare(const xenos::xe_gpu_texture_fetch_t& fetch,
-                          const ucode::instr_fetch_tex_t& fetch_instr,
+                          const gl4::ucode::instr_fetch_tex_t& fetch_instr,
                           SamplerInfo* out_info) {
   std::memset(out_info, 0, sizeof(SamplerInfo));
 
-  out_info->min_filter = static_cast<ucode::instr_tex_filter_t>(
+  out_info->min_filter = static_cast<TextureFilter>(
       fetch_instr.min_filter == 3 ? fetch.min_filter : fetch_instr.min_filter);
-  out_info->mag_filter = static_cast<ucode::instr_tex_filter_t>(
+  out_info->mag_filter = static_cast<TextureFilter>(
       fetch_instr.mag_filter == 3 ? fetch.mag_filter : fetch_instr.mag_filter);
-  out_info->mip_filter = static_cast<ucode::instr_tex_filter_t>(
+  out_info->mip_filter = static_cast<TextureFilter>(
       fetch_instr.mip_filter == 3 ? fetch.mip_filter : fetch_instr.mip_filter);
-  out_info->clamp_u = fetch.clamp_x;
-  out_info->clamp_v = fetch.clamp_y;
-  out_info->clamp_w = fetch.clamp_z;
-  out_info->aniso_filter = static_cast<ucode::instr_aniso_filter_t>(
+  out_info->clamp_u = static_cast<ClampMode>(fetch.clamp_x);
+  out_info->clamp_v = static_cast<ClampMode>(fetch.clamp_y);
+  out_info->clamp_w = static_cast<ClampMode>(fetch.clamp_z);
+  out_info->aniso_filter = static_cast<AnisoFilter>(
       fetch_instr.aniso_filter == 7 ? fetch.aniso_filter
                                     : fetch_instr.aniso_filter);
 
diff --git a/src/xenia/gpu/sampler_info.h b/src/xenia/gpu/sampler_info.h
index 4cc310731..1a776664c 100644
--- a/src/xenia/gpu/sampler_info.h
+++ b/src/xenia/gpu/sampler_info.h
@@ -10,23 +10,23 @@
 #ifndef XENIA_GPU_SAMPLER_INFO_H_
 #define XENIA_GPU_SAMPLER_INFO_H_
 
-#include "xenia/gpu/ucode.h"
+#include "xenia/gpu/gl4/ucode.h"
 #include "xenia/gpu/xenos.h"
 
 namespace xe {
 namespace gpu {
 
 struct SamplerInfo {
-  ucode::instr_tex_filter_t min_filter;
-  ucode::instr_tex_filter_t mag_filter;
-  ucode::instr_tex_filter_t mip_filter;
-  uint32_t clamp_u;
-  uint32_t clamp_v;
-  uint32_t clamp_w;
-  ucode::instr_aniso_filter_t aniso_filter;
+  TextureFilter min_filter;
+  TextureFilter mag_filter;
+  TextureFilter mip_filter;
+  ClampMode clamp_u;
+  ClampMode clamp_v;
+  ClampMode clamp_w;
+  AnisoFilter aniso_filter;
 
   static bool Prepare(const xenos::xe_gpu_texture_fetch_t& fetch,
-                      const ucode::instr_fetch_tex_t& fetch_instr,
+                      const gl4::ucode::instr_fetch_tex_t& fetch_instr,
                       SamplerInfo* out_info);
 
   uint64_t hash() const;
diff --git a/src/xenia/gpu/shader.cc b/src/xenia/gpu/shader.cc
index 2ae0701dd..f5e95dc52 100644
--- a/src/xenia/gpu/shader.cc
+++ b/src/xenia/gpu/shader.cc
@@ -13,12 +13,12 @@
 
 #include "xenia/base/math.h"
 #include "xenia/base/memory.h"
-#include "xenia/gpu/ucode_disassembler.h"
+#include "xenia/gpu/gl4/ucode_disassembler.h"
 
 namespace xe {
 namespace gpu {
 
-using namespace xe::gpu::ucode;
+using namespace xe::gpu::gl4::ucode;
 using namespace xe::gpu::xenos;
 
 Shader::Shader(ShaderType shader_type, uint64_t data_hash,
@@ -33,7 +33,7 @@ Shader::Shader(ShaderType shader_type, uint64_t data_hash,
   // Disassemble ucode and stash.
   // TODO(benvanik): debug only.
   ucode_disassembly_ =
-      DisassembleShader(shader_type_, data_.data(), data_.size());
+      gl4::DisassembleShader(shader_type_, data_.data(), data_.size());
 
   // Gather input/output registers/etc.
   GatherIO();
diff --git a/src/xenia/gpu/shader.h b/src/xenia/gpu/shader.h
index 2ec58e46b..47cf0c201 100644
--- a/src/xenia/gpu/shader.h
+++ b/src/xenia/gpu/shader.h
@@ -13,7 +13,7 @@
 #include <string>
 #include <vector>
 
-#include "xenia/gpu/ucode.h"
+#include "xenia/gpu/gl4/ucode.h"
 #include "xenia/gpu/xenos.h"
 
 namespace xe {
@@ -36,8 +36,8 @@ class Shader {
   uint32_t dword_count() const { return uint32_t(data_.size()); }
 
   struct BufferDescElement {
-    ucode::instr_fetch_vtx_t vtx_fetch;
-    xenos::VertexFormat format;
+    gl4::ucode::instr_fetch_vtx_t vtx_fetch;
+    VertexFormat format;
     uint32_t offset_words;
     uint32_t size_words;
     bool is_signed;
@@ -61,7 +61,7 @@ class Shader {
     uint32_t input_index;
     uint32_t fetch_slot;
     uint32_t format;
-    ucode::instr_fetch_tex_t tex_fetch;
+    gl4::ucode::instr_fetch_tex_t tex_fetch;
   };
   struct SamplerInputs {
     uint32_t count;
@@ -83,10 +83,10 @@ class Shader {
          uint32_t dword_count);
 
   void GatherIO();
-  void GatherAlloc(const ucode::instr_cf_alloc_t* cf);
-  void GatherExec(const ucode::instr_cf_exec_t* cf);
-  void GatherVertexFetch(const ucode::instr_fetch_vtx_t* vtx);
-  void GatherTextureFetch(const ucode::instr_fetch_tex_t* tex);
+  void GatherAlloc(const gl4::ucode::instr_cf_alloc_t* cf);
+  void GatherExec(const gl4::ucode::instr_cf_exec_t* cf);
+  void GatherVertexFetch(const gl4::ucode::instr_fetch_vtx_t* vtx);
+  void GatherTextureFetch(const gl4::ucode::instr_fetch_tex_t* tex);
 
   ShaderType shader_type_;
   uint64_t data_hash_;
@@ -100,7 +100,7 @@ class Shader {
   std::string error_log_;
 
   AllocCounts alloc_counts_;
-  std::vector<ucode::instr_cf_alloc_t> allocs_;
+  std::vector<gl4::ucode::instr_cf_alloc_t> allocs_;
   BufferInputs buffer_inputs_;
   SamplerInputs sampler_inputs_;
 };
diff --git a/src/xenia/gpu/texture_info.cc b/src/xenia/gpu/texture_info.cc
index 2a1fa40f3..2de06e973 100644
--- a/src/xenia/gpu/texture_info.cc
+++ b/src/xenia/gpu/texture_info.cc
@@ -18,7 +18,6 @@
 namespace xe {
 namespace gpu {
 
-using namespace xe::gpu::ucode;
 using namespace xe::gpu::xenos;
 
 const FormatInfo* FormatInfo::Get(uint32_t gpu_format) {
diff --git a/src/xenia/gpu/texture_info.h b/src/xenia/gpu/texture_info.h
index d417e026a..aa05d890c 100644
--- a/src/xenia/gpu/texture_info.h
+++ b/src/xenia/gpu/texture_info.h
@@ -14,7 +14,6 @@
 #include <memory>
 
 #include "xenia/base/assert.h"
-#include "xenia/gpu/ucode.h"
 #include "xenia/gpu/xenos.h"
 
 namespace xe {
@@ -89,37 +88,36 @@ enum class TextureFormat : uint32_t {
   kUnknown = 0xFFFFFFFFu,
 };
 
-inline TextureFormat ColorFormatToTextureFormat(
-    xenos::ColorFormat color_format) {
+inline TextureFormat ColorFormatToTextureFormat(ColorFormat color_format) {
   return static_cast<TextureFormat>(color_format);
 }
 
 inline TextureFormat ColorRenderTargetToTextureFormat(
-    xenos::ColorRenderTargetFormat color_format) {
+    ColorRenderTargetFormat color_format) {
   switch (color_format) {
-    case xenos::ColorRenderTargetFormat::k_8_8_8_8:
+    case ColorRenderTargetFormat::k_8_8_8_8:
       return TextureFormat::k_8_8_8_8;
-    case xenos::ColorRenderTargetFormat::k_8_8_8_8_GAMMA:
+    case ColorRenderTargetFormat::k_8_8_8_8_GAMMA:
       return TextureFormat::k_8_8_8_8;
-    case xenos::ColorRenderTargetFormat::k_2_10_10_10:
+    case ColorRenderTargetFormat::k_2_10_10_10:
       return TextureFormat::k_2_10_10_10;
-    case xenos::ColorRenderTargetFormat::k_2_10_10_10_FLOAT:
+    case ColorRenderTargetFormat::k_2_10_10_10_FLOAT:
       return TextureFormat::k_2_10_10_10_FLOAT;
-    case xenos::ColorRenderTargetFormat::k_16_16:
+    case ColorRenderTargetFormat::k_16_16:
       return TextureFormat::k_16_16;
-    case xenos::ColorRenderTargetFormat::k_16_16_16_16:
+    case ColorRenderTargetFormat::k_16_16_16_16:
       return TextureFormat::k_16_16_16_16;
-    case xenos::ColorRenderTargetFormat::k_16_16_FLOAT:
+    case ColorRenderTargetFormat::k_16_16_FLOAT:
       return TextureFormat::k_16_16_FLOAT;
-    case xenos::ColorRenderTargetFormat::k_16_16_16_16_FLOAT:
+    case ColorRenderTargetFormat::k_16_16_16_16_FLOAT:
       return TextureFormat::k_16_16_16_16_FLOAT;
-    case xenos::ColorRenderTargetFormat::k_2_10_10_10_unknown:
+    case ColorRenderTargetFormat::k_2_10_10_10_unknown:
       return TextureFormat::k_2_10_10_10;
-    case xenos::ColorRenderTargetFormat::k_2_10_10_10_FLOAT_unknown:
+    case ColorRenderTargetFormat::k_2_10_10_10_FLOAT_unknown:
       return TextureFormat::k_2_10_10_10_FLOAT;
-    case xenos::ColorRenderTargetFormat::k_32_FLOAT:
+    case ColorRenderTargetFormat::k_32_FLOAT:
       return TextureFormat::k_32_FLOAT;
-    case xenos::ColorRenderTargetFormat::k_32_32_FLOAT:
+    case ColorRenderTargetFormat::k_32_32_FLOAT:
       return TextureFormat::k_32_32_FLOAT;
     default:
       assert_unhandled_case(color_format);
@@ -128,11 +126,11 @@ inline TextureFormat ColorRenderTargetToTextureFormat(
 }
 
 inline TextureFormat DepthRenderTargetToTextureFormat(
-    xenos::DepthRenderTargetFormat depth_format) {
+    DepthRenderTargetFormat depth_format) {
   switch (depth_format) {
-    case xenos::DepthRenderTargetFormat::kD24S8:
+    case DepthRenderTargetFormat::kD24S8:
       return TextureFormat::k_24_8;
-    case xenos::DepthRenderTargetFormat::kD24FS8:
+    case DepthRenderTargetFormat::kD24FS8:
       return TextureFormat::k_24_8_FLOAT;
     default:
       assert_unhandled_case(depth_format);
@@ -163,7 +161,7 @@ struct TextureInfo {
   uint32_t height;
   uint32_t depth;
   const FormatInfo* format_info;
-  xenos::Endian endianness;
+  Endian endianness;
   bool is_tiled;
   uint32_t input_length;
   uint32_t output_length;
diff --git a/src/xenia/gpu/trace_viewer.h b/src/xenia/gpu/trace_viewer.h
index 542a553cf..f11927b4b 100644
--- a/src/xenia/gpu/trace_viewer.h
+++ b/src/xenia/gpu/trace_viewer.h
@@ -48,12 +48,12 @@ class TraceViewer {
 
   void DrawMultilineString(const std::string& str);
 
-  virtual uintptr_t GetColorRenderTarget(
-      uint32_t pitch, xenos::MsaaSamples samples, uint32_t base,
-      xenos::ColorRenderTargetFormat format) = 0;
-  virtual uintptr_t GetDepthRenderTarget(
-      uint32_t pitch, xenos::MsaaSamples samples, uint32_t base,
-      xenos::DepthRenderTargetFormat format) = 0;
+  virtual uintptr_t GetColorRenderTarget(uint32_t pitch, MsaaSamples samples,
+                                         uint32_t base,
+                                         ColorRenderTargetFormat format) = 0;
+  virtual uintptr_t GetDepthRenderTarget(uint32_t pitch, MsaaSamples samples,
+                                         uint32_t base,
+                                         DepthRenderTargetFormat format) = 0;
   virtual uintptr_t GetTextureEntry(const TextureInfo& texture_info,
                                     const SamplerInfo& sampler_info) = 0;
 
diff --git a/src/xenia/gpu/xenos.h b/src/xenia/gpu/xenos.h
index 87267eb50..0e5daa92e 100644
--- a/src/xenia/gpu/xenos.h
+++ b/src/xenia/gpu/xenos.h
@@ -12,7 +12,21 @@
 
 #include "xenia/base/assert.h"
 #include "xenia/base/byte_order.h"
-#include "xenia/gpu/ucode.h"
+
+#if XE_COMPILER_MSVC
+#define XEPACKEDSTRUCT(name, value)                                  \
+  __pragma(pack(push, 1)) struct name##_s value __pragma(pack(pop)); \
+  typedef struct name##_s name;
+#define XEPACKEDSTRUCTANONYMOUS(value) \
+  __pragma(pack(push, 1)) struct value __pragma(pack(pop));
+#define XEPACKEDUNION(name, value)                                  \
+  __pragma(pack(push, 1)) union name##_s value __pragma(pack(pop)); \
+  typedef union name##_s name;
+#else
+#define XEPACKEDSTRUCT(name, value) struct __attribute__((packed)) name value;
+#define XEPACKEDSTRUCTANONYMOUS(value) struct __attribute__((packed)) value;
+#define XEPACKEDUNION(name, value) union __attribute__((packed)) name value;
+#endif  // XE_PLATFORM_WIN32
 
 namespace xe {
 namespace gpu {
@@ -44,14 +58,45 @@ enum class Dimension : uint32_t {
   kCube = 3,
 };
 
-namespace xenos {
+enum class ClampMode : uint32_t {
+  kRepeat = 0,
+  kMirroredRepeat = 1,
+  kClampToEdge = 2,
+  kMirrorClampToEdge = 3,
+  kClampToHalfway = 4,
+  kMirrorClampToHalfway = 5,
+  kClampToBorder = 6,
+  kMirrorClampToBorder = 7,
+};
 
-typedef enum {
-  XE_GPU_INVALIDATE_MASK_VERTEX_SHADER = 1 << 8,
-  XE_GPU_INVALIDATE_MASK_PIXEL_SHADER = 1 << 9,
+enum class TextureFilter : uint32_t {
+  kPoint = 0,
+  kLinear = 1,
+  kBaseMap = 2,  // Only applicable for mip-filter.
+  kUseFetchConst = 3,
+};
 
-  XE_GPU_INVALIDATE_MASK_ALL = 0x7FFF,
-} XE_GPU_INVALIDATE_MASK;
+enum class AnisoFilter : uint32_t {
+  kDisabled = 0,
+  kMax_1_1 = 1,
+  kMax_2_1 = 2,
+  kMax_4_1 = 3,
+  kMax_8_1 = 4,
+  kMax_16_1 = 5,
+  kUseFetchConst = 7,
+};
+
+enum class TextureDimension : uint32_t {
+  k1D = 0,
+  k2D = 1,
+  k3D = 2,
+  kCube = 3,
+};
+
+enum class SampleLocation : uint32_t {
+  kCentroid = 0,
+  kCenter = 1,
+};
 
 enum class Endian : uint32_t {
   kUnspecified = 0,
@@ -100,20 +145,6 @@ enum class DepthRenderTargetFormat : uint32_t {
   kD24FS8 = 1,
 };
 
-enum class ModeControl : uint32_t {
-  kIgnore = 0,
-  kColorDepth = 4,
-  kDepth = 5,
-  kCopy = 6,
-};
-
-enum class CopyCommand : uint32_t {
-  kRaw = 0,
-  kConvert = 1,
-  kConstantOne = 2,
-  kNull = 3,  // ?
-};
-
 // Subset of a2xx_sq_surfaceformat.
 enum class ColorFormat : uint32_t {
   k_8 = 2,
@@ -144,6 +175,7 @@ enum class ColorFormat : uint32_t {
 };
 
 enum class VertexFormat : uint32_t {
+  kUndefined = 0,
   k_8_8_8_8 = 6,
   k_2_10_10_10 = 7,
   k_10_11_11 = 16,
@@ -160,6 +192,30 @@ enum class VertexFormat : uint32_t {
   k_32_32_32_32_FLOAT = 38,
   k_32_32_32_FLOAT = 57,
 };
+
+namespace xenos {
+
+typedef enum {
+  XE_GPU_INVALIDATE_MASK_VERTEX_SHADER = 1 << 8,
+  XE_GPU_INVALIDATE_MASK_PIXEL_SHADER = 1 << 9,
+
+  XE_GPU_INVALIDATE_MASK_ALL = 0x7FFF,
+} XE_GPU_INVALIDATE_MASK;
+
+enum class ModeControl : uint32_t {
+  kIgnore = 0,
+  kColorDepth = 4,
+  kDepth = 5,
+  kCopy = 6,
+};
+
+enum class CopyCommand : uint32_t {
+  kRaw = 0,
+  kConvert = 1,
+  kConstantOne = 2,
+  kNull = 3,  // ?
+};
+
 inline int GetVertexFormatComponentCount(VertexFormat format) {
   switch (format) {
     case VertexFormat::k_32:
diff --git a/src/xenia/kernel/xboxkrnl/xboxkrnl_video.cc b/src/xenia/kernel/xboxkrnl/xboxkrnl_video.cc
index 0d6dae6e8..345509b05 100644
--- a/src/xenia/kernel/xboxkrnl/xboxkrnl_video.cc
+++ b/src/xenia/kernel/xboxkrnl/xboxkrnl_video.cc
@@ -345,10 +345,10 @@ void VdSwap(lpvoid_t buffer_ptr,  // ptr into primary ringbuffer
       reinterpret_cast<uint32_t*>(&fetch),
       reinterpret_cast<uint32_t*>(fetch_ptr.host_address()), 6);
 
-  auto color_format = gpu::xenos::ColorFormat(color_format_ptr.value());
+  auto color_format = gpu::ColorFormat(color_format_ptr.value());
   auto color_space = *color_space_ptr;
-  assert_true(color_format == gpu::xenos::ColorFormat::k_8_8_8_8 ||
-              color_format == gpu::xenos::ColorFormat::kUnknown0x36);
+  assert_true(color_format == gpu::ColorFormat::k_8_8_8_8 ||
+              color_format == gpu::ColorFormat::kUnknown0x36);
   assert_true(color_space == 0);
   assert_true(*frontbuffer_ptr == fetch.address << 12);
   assert_true(last_frontbuffer_width_ == 1 + fetch.size_2d.width);