shader: Implement IMNMX

5 files changed, 84 insertions, 12 deletions

diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.cpp b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
index 54fdf9559..04edcdfd8 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.cpp
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
@@ -816,6 +816,22 @@ U32 IREmitter::BitwiseNot(const U32& a) {
     return Inst<U32>(Opcode::BitwiseNot32, a);
 }
 
+U32 IREmitter::SMin(const U32& a, const U32& b) {
+    return Inst<U32>(Opcode::SMin32, a, b);
+}
+
+U32 IREmitter::UMin(const U32& a, const U32& b) {
+    return Inst<U32>(Opcode::UMin32, a, b);
+}
+
+U32 IREmitter::SMax(const U32& a, const U32& b) {
+    return Inst<U32>(Opcode::SMax32, a, b);
+}
+
+U32 IREmitter::UMax(const U32& a, const U32& b) {
+    return Inst<U32>(Opcode::UMax32, a, b);
+}
+
 U1 IREmitter::ILessThan(const U32& lhs, const U32& rhs, bool is_signed) {
     return Inst<U1>(is_signed ? Opcode::SLessThan : Opcode::ULessThan, lhs, rhs);
 }
diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.h b/src/shader_recompiler/frontend/ir/ir_emitter.h
index 9dec22145..00ba2e4cd 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.h
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.h
@@ -163,6 +163,11 @@ public:
     [[nodiscard]] U32 BitCount(const U32& value);
     [[nodiscard]] U32 BitwiseNot(const U32& a);
 
+    [[nodiscard]] U32 SMin(const U32& a, const U32& b);
+    [[nodiscard]] U32 UMin(const U32& a, const U32& b);
+    [[nodiscard]] U32 SMax(const U32& a, const U32& b);
+    [[nodiscard]] U32 UMax(const U32& a, const U32& b);
+
     [[nodiscard]] U1 ILessThan(const U32& lhs, const U32& rhs, bool is_signed);
     [[nodiscard]] U1 IEqual(const U32& lhs, const U32& rhs);
     [[nodiscard]] U1 ILessThanEqual(const U32& lhs, const U32& rhs, bool is_signed);
diff --git a/src/shader_recompiler/frontend/ir/opcodes.inc b/src/shader_recompiler/frontend/ir/opcodes.inc
index 59a13e911..2c4a997dc 100644
--- a/src/shader_recompiler/frontend/ir/opcodes.inc
+++ b/src/shader_recompiler/frontend/ir/opcodes.inc
@@ -235,6 +235,10 @@ OPCODE(BitReverse32,                                        U32,            U32,
 OPCODE(BitCount32,                                          U32,            U32,                                                            )
 OPCODE(BitwiseNot32,                                        U32,            U32,                                                            )
 
+OPCODE(SMin32,                                              U32,            U32,            U32,                                            )
+OPCODE(UMin32,                                              U32,            U32,            U32,                                            )
+OPCODE(SMax32,                                              U32,            U32,            U32,                                            )
+OPCODE(UMax32,                                              U32,            U32,            U32,                                            )
 OPCODE(SLessThan,                                           U1,             U32,            U32,                                            )
 OPCODE(ULessThan,                                           U1,             U32,            U32,                                            )
 OPCODE(IEqual,                                              U1,             U32,            U32,                                            )
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp
new file mode 100644
index 000000000..12c6aae3d
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp
@@ -0,0 +1,59 @@
+// 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 IMNMX(TranslatorVisitor& v, u64 insn, const IR::U32& op_b) {
+    union {
+        u64 insn;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> src_reg;
+        BitField<39, 3, IR::Pred> pred;
+        BitField<42, 1, u64> neg_pred;
+        BitField<43, 2, u64> mode;
+        BitField<48, 1, u64> is_signed;
+    } const imnmx{insn};
+
+    if (imnmx.mode != 0) {
+        throw NotImplementedException("IMNMX.MODE");
+    }
+
+    IR::U1 pred = v.ir.GetPred(imnmx.pred);
+    const IR::U32 op_a{v.X(imnmx.src_reg)};
+    IR::U32 min;
+    IR::U32 max;
+
+    if (imnmx.is_signed != 0) {
+        min = IR::U32{v.ir.SMin(op_a, op_b)};
+        max = IR::U32{v.ir.SMax(op_a, op_b)};
+    } else {
+        min = IR::U32{v.ir.UMin(op_a, op_b)};
+        max = IR::U32{v.ir.UMax(op_a, op_b)};
+    }
+    if (imnmx.neg_pred != 0) {
+        std::swap(min, max);
+    }
+
+    const IR::U32 result{v.ir.Select(pred, min, max)};
+    v.X(imnmx.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::IMNMX_reg(u64 insn) {
+    IMNMX(*this, insn, GetReg20(insn));
+}
+
+void TranslatorVisitor::IMNMX_cbuf(u64 insn) {
+    IMNMX(*this, insn, GetCbuf(insn));
+}
+
+void TranslatorVisitor::IMNMX_imm(u64 insn) {
+    IMNMX(*this, insn, GetImm20(insn));
+}
+
+} // namespace Shader::Maxwell
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 ed2cfac60..615e3c3b5 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
@@ -453,18 +453,6 @@ void TranslatorVisitor::IMADSP_imm(u64) {
     ThrowNotImplemented(Opcode::IMADSP_imm);
 }
 
-void TranslatorVisitor::IMNMX_reg(u64) {
-    ThrowNotImplemented(Opcode::IMNMX_reg);
-}
-
-void TranslatorVisitor::IMNMX_cbuf(u64) {
-    ThrowNotImplemented(Opcode::IMNMX_cbuf);
-}
-
-void TranslatorVisitor::IMNMX_imm(u64) {
-    ThrowNotImplemented(Opcode::IMNMX_imm);
-}
-
 void TranslatorVisitor::IMUL_reg(u64) {
     ThrowNotImplemented(Opcode::IMUL_reg);
 }