1 files changed, 92 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/video_minimum_maximum.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/video_minimum_maximum.cpp
new file mode 100644
index 000000000..78869601f
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/video_minimum_maximum.cpp
@@ -0,0 +1,92 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/common_types.h"
+#include "shader_recompiler/exception.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/video_helper.h"
+
+namespace Shader::Maxwell {
+namespace {
+enum class VideoMinMaxOps : u64 {
+    MRG_16H,
+    MRG_16L,
+    MRG_8B0,
+    MRG_8B2,
+    ACC,
+    MIN,
+    MAX,
+};
+
+[[nodiscard]] IR::U32 ApplyVideoMinMaxOp(IR::IREmitter& ir, const IR::U32& lhs, const IR::U32& rhs,
+                                         VideoMinMaxOps op, bool is_signed) {
+    switch (op) {
+    case VideoMinMaxOps::MIN:
+        return ir.IMin(lhs, rhs, is_signed);
+    case VideoMinMaxOps::MAX:
+        return ir.IMax(lhs, rhs, is_signed);
+    default:
+        throw NotImplementedException("VMNMX op {}", op);
+    }
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::VMNMX(u64 insn) {
+    union {
+        u64 raw;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<20, 16, u64> src_b_imm;
+        BitField<28, 2, u64> src_b_selector;
+        BitField<29, 2, VideoWidth> src_b_width;
+        BitField<36, 2, u64> src_a_selector;
+        BitField<37, 2, VideoWidth> src_a_width;
+        BitField<47, 1, u64> cc;
+        BitField<48, 1, u64> src_a_sign;
+        BitField<49, 1, u64> src_b_sign;
+        BitField<50, 1, u64> is_src_b_reg;
+        BitField<51, 3, VideoMinMaxOps> op;
+        BitField<54, 1, u64> dest_sign;
+        BitField<55, 1, u64> sat;
+        BitField<56, 1, u64> mx;
+    } const vmnmx{insn};
+
+    if (vmnmx.cc != 0) {
+        throw NotImplementedException("VMNMX CC");
+    }
+    if (vmnmx.sat != 0) {
+        throw NotImplementedException("VMNMX SAT");
+    }
+    // Selectors were shown to default to 2 in unit tests
+    if (vmnmx.src_a_selector != 2) {
+        throw NotImplementedException("VMNMX Selector {}", vmnmx.src_a_selector.Value());
+    }
+    if (vmnmx.src_b_selector != 2) {
+        throw NotImplementedException("VMNMX Selector {}", vmnmx.src_b_selector.Value());
+    }
+    if (vmnmx.src_a_width != VideoWidth::Word) {
+        throw NotImplementedException("VMNMX Source Width {}", vmnmx.src_a_width.Value());
+    }
+
+    const bool is_b_imm{vmnmx.is_src_b_reg == 0};
+    const IR::U32 src_a{GetReg8(insn)};
+    const IR::U32 src_b{is_b_imm ? ir.Imm32(static_cast<u32>(vmnmx.src_b_imm)) : GetReg20(insn)};
+    const IR::U32 src_c{GetReg39(insn)};
+
+    const VideoWidth a_width{vmnmx.src_a_width};
+    const VideoWidth b_width{GetVideoSourceWidth(vmnmx.src_b_width, is_b_imm)};
+
+    const bool src_a_signed{vmnmx.src_a_sign != 0};
+    const bool src_b_signed{vmnmx.src_b_sign != 0};
+    const IR::U32 op_a{ExtractVideoOperandValue(ir, src_a, a_width, 0, src_a_signed)};
+    const IR::U32 op_b{ExtractVideoOperandValue(ir, src_b, b_width, 0, src_b_signed)};
+
+    // First operation's sign is only dependent on operand b's sign
+    const bool op_1_signed{src_b_signed};
+
+    const IR::U32 lhs{vmnmx.mx != 0 ? ir.IMax(op_a, op_b, op_1_signed)
+                                    : ir.IMin(op_a, op_b, op_1_signed)};
+    X(vmnmx.dest_reg, ApplyVideoMinMaxOp(ir, lhs, src_c, vmnmx.op, vmnmx.dest_sign != 0));
+}
+
+} // namespace Shader::Maxwell