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-rw-r--r--src/video_core/shader/decode/bfe.cpp69
-rw-r--r--src/video_core/shader/node_helper.cpp2
-rw-r--r--src/video_core/shader/transform_feedback.cpp115
-rw-r--r--src/video_core/shader/transform_feedback.h23
4 files changed, 188 insertions, 21 deletions
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
index e02bcd097..8e3b46e8e 100644
--- a/src/video_core/shader/decode/bfe.cpp
+++ b/src/video_core/shader/decode/bfe.cpp
@@ -17,33 +17,60 @@ u32 ShaderIR::DecodeBfe(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED_IF(instr.bfe.negate_b);
-
Node op_a = GetRegister(instr.gpr8);
- op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false);
-
- switch (opcode->get().GetId()) {
- case OpCode::Id::BFE_IMM: {
- UNIMPLEMENTED_IF_MSG(instr.generates_cc,
- "Condition codes generation in BFE is not implemented");
+ Node op_b = [&] {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::BFE_R:
+ return GetRegister(instr.gpr20);
+ case OpCode::Id::BFE_C:
+ return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
+ case OpCode::Id::BFE_IMM:
+ return Immediate(instr.alu.GetSignedImm20_20());
+ default:
+ UNREACHABLE();
+ return Immediate(0);
+ }
+ }();
- const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue()));
- const Node outer_shift_imm =
- Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position));
+ UNIMPLEMENTED_IF_MSG(instr.bfe.rd_cc, "Condition codes in BFE is not implemented");
- const Node inner_shift =
- Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm);
- const Node outer_shift =
- Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm);
+ const bool is_signed = instr.bfe.is_signed;
- SetInternalFlagsFromInteger(bb, outer_shift, instr.generates_cc);
- SetRegister(bb, instr.gpr0, outer_shift);
- break;
- }
- default:
- UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName());
+ // using reverse parallel method in
+ // https://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel
+ // note for later if possible to implement faster method.
+ if (instr.bfe.brev) {
+ const auto swap = [&](u32 s, u32 mask) {
+ Node v1 =
+ SignedOperation(OperationCode::ILogicalShiftRight, is_signed, op_a, Immediate(s));
+ if (mask != 0) {
+ v1 = SignedOperation(OperationCode::IBitwiseAnd, is_signed, std::move(v1),
+ Immediate(mask));
+ }
+ Node v2 = op_a;
+ if (mask != 0) {
+ v2 = SignedOperation(OperationCode::IBitwiseAnd, is_signed, std::move(v2),
+ Immediate(mask));
+ }
+ v2 = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed, std::move(v2),
+ Immediate(s));
+ return SignedOperation(OperationCode::IBitwiseOr, is_signed, std::move(v1),
+ std::move(v2));
+ };
+ op_a = swap(1, 0x55555555U);
+ op_a = swap(2, 0x33333333U);
+ op_a = swap(4, 0x0F0F0F0FU);
+ op_a = swap(8, 0x00FF00FFU);
+ op_a = swap(16, 0);
}
+ const auto offset = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
+ Immediate(0), Immediate(8));
+ const auto bits = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
+ Immediate(8), Immediate(8));
+ auto result = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_a, offset, bits);
+ SetRegister(bb, instr.gpr0, std::move(result));
+
return pc;
}
diff --git a/src/video_core/shader/node_helper.cpp b/src/video_core/shader/node_helper.cpp
index b3dcd291c..76c56abb5 100644
--- a/src/video_core/shader/node_helper.cpp
+++ b/src/video_core/shader/node_helper.cpp
@@ -68,6 +68,8 @@ OperationCode SignedToUnsignedCode(OperationCode operation_code, bool is_signed)
return OperationCode::UBitwiseXor;
case OperationCode::IBitwiseNot:
return OperationCode::UBitwiseNot;
+ case OperationCode::IBitfieldExtract:
+ return OperationCode::UBitfieldExtract;
case OperationCode::IBitfieldInsert:
return OperationCode::UBitfieldInsert;
case OperationCode::IBitCount:
diff --git a/src/video_core/shader/transform_feedback.cpp b/src/video_core/shader/transform_feedback.cpp
new file mode 100644
index 000000000..22a933761
--- /dev/null
+++ b/src/video_core/shader/transform_feedback.cpp
@@ -0,0 +1,115 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <array>
+#include <unordered_map>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/shader/registry.h"
+#include "video_core/shader/transform_feedback.h"
+
+namespace VideoCommon::Shader {
+
+namespace {
+
+using Maxwell = Tegra::Engines::Maxwell3D::Regs;
+
+// TODO(Rodrigo): Change this to constexpr std::unordered_set in C++20
+
+/// Attribute offsets that describe a vector
+constexpr std::array VECTORS = {
+ 28, // gl_Position
+ 32, // Generic 0
+ 36, // Generic 1
+ 40, // Generic 2
+ 44, // Generic 3
+ 48, // Generic 4
+ 52, // Generic 5
+ 56, // Generic 6
+ 60, // Generic 7
+ 64, // Generic 8
+ 68, // Generic 9
+ 72, // Generic 10
+ 76, // Generic 11
+ 80, // Generic 12
+ 84, // Generic 13
+ 88, // Generic 14
+ 92, // Generic 15
+ 96, // Generic 16
+ 100, // Generic 17
+ 104, // Generic 18
+ 108, // Generic 19
+ 112, // Generic 20
+ 116, // Generic 21
+ 120, // Generic 22
+ 124, // Generic 23
+ 128, // Generic 24
+ 132, // Generic 25
+ 136, // Generic 26
+ 140, // Generic 27
+ 144, // Generic 28
+ 148, // Generic 29
+ 152, // Generic 30
+ 156, // Generic 31
+ 160, // gl_FrontColor
+ 164, // gl_FrontSecondaryColor
+ 160, // gl_BackColor
+ 164, // gl_BackSecondaryColor
+ 192, // gl_TexCoord[0]
+ 196, // gl_TexCoord[1]
+ 200, // gl_TexCoord[2]
+ 204, // gl_TexCoord[3]
+ 208, // gl_TexCoord[4]
+ 212, // gl_TexCoord[5]
+ 216, // gl_TexCoord[6]
+ 220, // gl_TexCoord[7]
+};
+} // namespace
+
+std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info) {
+
+ std::unordered_map<u8, VaryingTFB> tfb;
+
+ for (std::size_t buffer = 0; buffer < Maxwell::NumTransformFeedbackBuffers; ++buffer) {
+ const auto& locations = info.tfb_varying_locs[buffer];
+ const auto& layout = info.tfb_layouts[buffer];
+ const std::size_t varying_count = layout.varying_count;
+
+ std::size_t highest = 0;
+
+ for (std::size_t offset = 0; offset < varying_count; ++offset) {
+ const std::size_t base_offset = offset;
+ const u8 location = locations[offset];
+
+ VaryingTFB varying;
+ varying.buffer = layout.stream;
+ varying.stride = layout.stride;
+ varying.offset = offset * sizeof(u32);
+ varying.components = 1;
+
+ if (std::find(VECTORS.begin(), VECTORS.end(), location / 4 * 4) != VECTORS.end()) {
+ UNIMPLEMENTED_IF_MSG(location % 4 != 0, "Unaligned TFB");
+
+ const u8 base_index = location / 4;
+ while (offset + 1 < varying_count && base_index == locations[offset + 1] / 4) {
+ ++offset;
+ ++varying.components;
+ }
+ }
+
+ [[maybe_unused]] const bool inserted = tfb.emplace(location, varying).second;
+ UNIMPLEMENTED_IF_MSG(!inserted, "Varying already stored");
+
+ highest = std::max(highest, (base_offset + varying.components) * sizeof(u32));
+ }
+
+ UNIMPLEMENTED_IF(highest != layout.stride);
+ }
+ return tfb;
+}
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/transform_feedback.h b/src/video_core/shader/transform_feedback.h
new file mode 100644
index 000000000..77d05f64c
--- /dev/null
+++ b/src/video_core/shader/transform_feedback.h
@@ -0,0 +1,23 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <unordered_map>
+
+#include "common/common_types.h"
+#include "video_core/shader/registry.h"
+
+namespace VideoCommon::Shader {
+
+struct VaryingTFB {
+ std::size_t buffer;
+ std::size_t stride;
+ std::size_t offset;
+ std::size_t components;
+};
+
+std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info);
+
+} // namespace VideoCommon::Shader
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-11 21:10:26 +0000