1 files changed, 143 insertions, 0 deletions

diff --git a/src/shader_recompiler/program_header.h b/src/shader_recompiler/program_header.h
new file mode 100644
index 000000000..1544bfa42
--- /dev/null
+++ b/src/shader_recompiler/program_header.h
@@ -0,0 +1,143 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <optional>
+
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Shader {
+
+enum class OutputTopology : u32 {
+    PointList = 1,
+    LineStrip = 6,
+    TriangleStrip = 7,
+};
+
+enum class PixelImap : u8 {
+    Unused = 0,
+    Constant = 1,
+    Perspective = 2,
+    ScreenLinear = 3,
+};
+
+// Documentation in:
+// http://download.nvidia.com/open-gpu-doc/Shader-Program-Header/1/Shader-Program-Header.html
+struct ProgramHeader {
+    union {
+        BitField<0, 5, u32> sph_type;
+        BitField<5, 5, u32> version;
+        BitField<10, 4, u32> shader_type;
+        BitField<14, 1, u32> mrt_enable;
+        BitField<15, 1, u32> kills_pixels;
+        BitField<16, 1, u32> does_global_store;
+        BitField<17, 4, u32> sass_version;
+        BitField<21, 5, u32> reserved;
+        BitField<26, 1, u32> does_load_or_store;
+        BitField<27, 1, u32> does_fp64;
+        BitField<28, 4, u32> stream_out_mask;
+    } common0;
+
+    union {
+        BitField<0, 24, u32> shader_local_memory_low_size;
+        BitField<24, 8, u32> per_patch_attribute_count;
+    } common1;
+
+    union {
+        BitField<0, 24, u32> shader_local_memory_high_size;
+        BitField<24, 8, u32> threads_per_input_primitive;
+    } common2;
+
+    union {
+        BitField<0, 24, u32> shader_local_memory_crs_size;
+        BitField<24, 4, OutputTopology> output_topology;
+        BitField<28, 4, u32> reserved;
+    } common3;
+
+    union {
+        BitField<0, 12, u32> max_output_vertices;
+        BitField<12, 8, u32> store_req_start; // NOTE: not used by geometry shaders.
+        BitField<20, 4, u32> reserved;
+        BitField<24, 8, u32> store_req_end; // NOTE: not used by geometry shaders.
+    } common4;
+
+    union {
+        struct {
+            INSERT_PADDING_BYTES_NOINIT(3);  // ImapSystemValuesA
+            INSERT_PADDING_BYTES_NOINIT(1);  // ImapSystemValuesB
+            INSERT_PADDING_BYTES_NOINIT(16); // ImapGenericVector[32]
+            INSERT_PADDING_BYTES_NOINIT(2);  // ImapColor
+            union {
+                BitField<0, 8, u16> clip_distances;
+                BitField<8, 1, u16> point_sprite_s;
+                BitField<9, 1, u16> point_sprite_t;
+                BitField<10, 1, u16> fog_coordinate;
+                BitField<12, 1, u16> tessellation_eval_point_u;
+                BitField<13, 1, u16> tessellation_eval_point_v;
+                BitField<14, 1, u16> instance_id;
+                BitField<15, 1, u16> vertex_id;
+            };
+            INSERT_PADDING_BYTES_NOINIT(5);  // ImapFixedFncTexture[10]
+            INSERT_PADDING_BYTES_NOINIT(1);  // ImapReserved
+            INSERT_PADDING_BYTES_NOINIT(3);  // OmapSystemValuesA
+            INSERT_PADDING_BYTES_NOINIT(1);  // OmapSystemValuesB
+            INSERT_PADDING_BYTES_NOINIT(16); // OmapGenericVector[32]
+            INSERT_PADDING_BYTES_NOINIT(2);  // OmapColor
+            INSERT_PADDING_BYTES_NOINIT(2);  // OmapSystemValuesC
+            INSERT_PADDING_BYTES_NOINIT(5);  // OmapFixedFncTexture[10]
+            INSERT_PADDING_BYTES_NOINIT(1);  // OmapReserved
+        } vtg;
+
+        struct {
+            INSERT_PADDING_BYTES_NOINIT(3); // ImapSystemValuesA
+            INSERT_PADDING_BYTES_NOINIT(1); // ImapSystemValuesB
+
+            union {
+                BitField<0, 2, PixelImap> x;
+                BitField<2, 2, PixelImap> y;
+                BitField<4, 2, PixelImap> z;
+                BitField<6, 2, PixelImap> w;
+                u8 raw;
+            } imap_generic_vector[32];
+
+            INSERT_PADDING_BYTES_NOINIT(2);  // ImapColor
+            INSERT_PADDING_BYTES_NOINIT(2);  // ImapSystemValuesC
+            INSERT_PADDING_BYTES_NOINIT(10); // ImapFixedFncTexture[10]
+            INSERT_PADDING_BYTES_NOINIT(2);  // ImapReserved
+
+            struct {
+                u32 target;
+                union {
+                    BitField<0, 1, u32> sample_mask;
+                    BitField<1, 1, u32> depth;
+                    BitField<2, 30, u32> reserved;
+                };
+            } omap;
+
+            [[nodiscard]] std::array<bool, 4> EnabledOutputComponents(u32 rt) const noexcept {
+                const u32 bits{omap.target >> (rt * 4)};
+                return {(bits & 1) != 0, (bits & 2) != 0, (bits & 4) != 0, (bits & 8) != 0};
+            }
+
+            [[nodiscard]] std::array<PixelImap, 4> GenericInputMap(u32 attribute) const {
+                const auto& vector{imap_generic_vector[attribute]};
+                return {vector.x, vector.y, vector.z, vector.w};
+            }
+        } ps;
+
+        std::array<u32, 0xf> raw;
+    };
+
+    [[nodiscard]] u64 LocalMemorySize() const noexcept {
+        return (common1.shader_local_memory_low_size |
+                (common2.shader_local_memory_high_size << 24));
+    }
+};
+static_assert(sizeof(ProgramHeader) == 0x50, "Incorrect structure size");
+
+} // namespace Shader