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-rw-r--r--src/shader_recompiler/frontend/maxwell/translate/impl/warp_shuffle.cpp69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/warp_shuffle.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/warp_shuffle.cpp
new file mode 100644
index 000000000..550fed55c
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/warp_shuffle.cpp
@@ -0,0 +1,69 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <optional>
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+enum class ShuffleMode : u64 {
+ IDX,
+ UP,
+ DOWN,
+ BFLY,
+};
+
+[[nodiscard]] IR::U32 ShuffleOperation(IR::IREmitter& ir, const IR::U32& value,
+ const IR::U32& index, const IR::U32& mask,
+ ShuffleMode shfl_op) {
+ const IR::U32 clamp{ir.BitFieldExtract(mask, ir.Imm32(0), ir.Imm32(5))};
+ const IR::U32 seg_mask{ir.BitFieldExtract(mask, ir.Imm32(8), ir.Imm32(5))};
+ switch (shfl_op) {
+ case ShuffleMode::IDX:
+ return ir.ShuffleIndex(value, index, clamp, seg_mask);
+ case ShuffleMode::UP:
+ return ir.ShuffleUp(value, index, clamp, seg_mask);
+ case ShuffleMode::DOWN:
+ return ir.ShuffleDown(value, index, clamp, seg_mask);
+ case ShuffleMode::BFLY:
+ return ir.ShuffleButterfly(value, index, clamp, seg_mask);
+ default:
+ throw NotImplementedException("Invalid SHFL op {}", shfl_op);
+ }
+}
+
+void Shuffle(TranslatorVisitor& v, u64 insn, const IR::U32& index, const IR::U32& mask) {
+ union {
+ u64 insn;
+ BitField<0, 8, IR::Reg> dest_reg;
+ BitField<8, 8, IR::Reg> src_reg;
+ BitField<30, 2, ShuffleMode> mode;
+ BitField<48, 3, IR::Pred> pred;
+ } const shfl{insn};
+
+ const IR::U32 result{ShuffleOperation(v.ir, v.X(shfl.src_reg), index, mask, shfl.mode)};
+ v.ir.SetPred(shfl.pred, v.ir.GetInBoundsFromOp(result));
+ v.X(shfl.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::SHFL(u64 insn) {
+ union {
+ u64 insn;
+ BitField<20, 5, u64> src_a_imm;
+ BitField<28, 1, u64> src_a_flag;
+ BitField<29, 1, u64> src_b_flag;
+ BitField<34, 13, u64> src_b_imm;
+ } const flags{insn};
+ const IR::U32 src_a{flags.src_a_flag != 0 ? ir.Imm32(static_cast<u32>(flags.src_a_imm))
+ : GetReg20(insn)};
+ const IR::U32 src_b{flags.src_b_flag != 0 ? ir.Imm32(static_cast<u32>(flags.src_b_imm))
+ : GetReg39(insn)};
+ Shuffle(*this, insn, src_a, src_b);
+}
+
+} // namespace Shader::Maxwell