shader: Implement POPC

1 files changed, 36 insertions, 0 deletions

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_popcount.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_popcount.cpp
new file mode 100644
index 000000000..5ece7678d
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_popcount.cpp
@@ -0,0 +1,36 @@
+// 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/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+void POPC(TranslatorVisitor& v, u64 insn, const IR::U32& src) {
+    union {
+        u64 raw;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<40, 1, u64> tilde;
+    } const popc{insn};
+
+    const IR::U32 operand = popc.tilde == 0 ? src : v.ir.BitwiseNot(src);
+    const IR::U32 result = v.ir.BitCount(operand);
+    v.X(popc.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::POPC_reg(u64 insn) {
+    POPC(*this, insn, GetReg20(insn));
+}
+
+void TranslatorVisitor::POPC_cbuf(u64 insn) {
+    POPC(*this, insn, GetCbuf(insn));
+}
+
+void TranslatorVisitor::POPC_imm(u64 insn) {
+    POPC(*this, insn, GetImm20(insn));
+}
+
+} // namespace Shader::Maxwell