1 files changed, 96 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/barrier_operations.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/barrier_operations.cpp
new file mode 100644
index 000000000..86e433e41
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/barrier_operations.cpp
@@ -0,0 +1,96 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/ir/modifiers.h"
+#include "shader_recompiler/frontend/maxwell/opcodes.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+// Seems to be in CUDA terminology.
+enum class LocalScope : u64 {
+    CTA,
+    GL,
+    SYS,
+    VC,
+};
+} // Anonymous namespace
+
+void TranslatorVisitor::MEMBAR(u64 inst) {
+    union {
+        u64 raw;
+        BitField<8, 2, LocalScope> scope;
+    } const membar{inst};
+
+    if (membar.scope == LocalScope::CTA) {
+        ir.WorkgroupMemoryBarrier();
+    } else {
+        ir.DeviceMemoryBarrier();
+    }
+}
+
+void TranslatorVisitor::DEPBAR() {
+    // DEPBAR is a no-op
+}
+
+void TranslatorVisitor::BAR(u64 insn) {
+    enum class Mode {
+        RedPopc,
+        Scan,
+        RedAnd,
+        RedOr,
+        Sync,
+        Arrive,
+    };
+    union {
+        u64 raw;
+        BitField<43, 1, u64> is_a_imm;
+        BitField<44, 1, u64> is_b_imm;
+        BitField<8, 8, u64> imm_a;
+        BitField<20, 12, u64> imm_b;
+        BitField<42, 1, u64> neg_pred;
+        BitField<39, 3, IR::Pred> pred;
+    } const bar{insn};
+
+    const Mode mode{[insn] {
+        switch (insn & 0x0000009B00000000ULL) {
+        case 0x0000000200000000ULL:
+            return Mode::RedPopc;
+        case 0x0000000300000000ULL:
+            return Mode::Scan;
+        case 0x0000000A00000000ULL:
+            return Mode::RedAnd;
+        case 0x0000001200000000ULL:
+            return Mode::RedOr;
+        case 0x0000008000000000ULL:
+            return Mode::Sync;
+        case 0x0000008100000000ULL:
+            return Mode::Arrive;
+        }
+        throw NotImplementedException("Invalid encoding");
+    }()};
+    if (mode != Mode::Sync) {
+        throw NotImplementedException("BAR mode {}", mode);
+    }
+    if (bar.is_a_imm == 0) {
+        throw NotImplementedException("Non-immediate input A");
+    }
+    if (bar.imm_a != 0) {
+        throw NotImplementedException("Non-zero input A");
+    }
+    if (bar.is_b_imm == 0) {
+        throw NotImplementedException("Non-immediate input B");
+    }
+    if (bar.imm_b != 0) {
+        throw NotImplementedException("Non-zero input B");
+    }
+    if (bar.pred != IR::Pred::PT && bar.neg_pred != 0) {
+        throw NotImplementedException("Non-true input predicate");
+    }
+    ir.Barrier();
+}
+
+} // namespace Shader::Maxwell