shader: Implement SEL

2 files changed, 44 insertions, 12 deletions

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
index 3f6dedfdd..82c73bf8c 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
@@ -729,18 +729,6 @@ void TranslatorVisitor::SAM(u64) {
     ThrowNotImplemented(Opcode::SAM);
 }
 
-void TranslatorVisitor::SEL_reg(u64) {
-    ThrowNotImplemented(Opcode::SEL_reg);
-}
-
-void TranslatorVisitor::SEL_cbuf(u64) {
-    ThrowNotImplemented(Opcode::SEL_cbuf);
-}
-
-void TranslatorVisitor::SEL_imm(u64) {
-    ThrowNotImplemented(Opcode::SEL_imm);
-}
-
 void TranslatorVisitor::SETCRSPTR(u64) {
     ThrowNotImplemented(Opcode::SETCRSPTR);
 }
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/select_source_with_predicate.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/select_source_with_predicate.cpp
new file mode 100644
index 000000000..25fc6b437
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/select_source_with_predicate.cpp
@@ -0,0 +1,44 @@
+// 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 SEL(TranslatorVisitor& v, u64 insn, const IR::U32& src) {
+    union {
+        u64 raw;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> op_a;
+        BitField<39, 3, IR::Pred> pred;
+        BitField<42, 1, u64> neg_pred;
+    } const sel{insn};
+
+    const IR::U1 pred = v.ir.GetPred(sel.pred);
+    IR::U32 op_a{v.X(sel.op_a)};
+    IR::U32 op_b{src};
+    if (sel.neg_pred != 0) {
+        std::swap(op_a, op_b);
+    }
+    const IR::U32 result{v.ir.Select(pred, op_a, op_b)};
+
+    v.X(sel.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::SEL_reg(u64 insn) {
+    SEL(*this, insn, GetReg20(insn));
+}
+
+void TranslatorVisitor::SEL_cbuf(u64 insn) {
+    SEL(*this, insn, GetCbuf(insn));
+}
+
+void TranslatorVisitor::SEL_imm(u64 insn) {
+    SEL(*this, insn, GetImm20(insn));
+}
+} // namespace Shader::Maxwell