A64: Implement SDOT and UDOT's vector variant

src/frontend/A64/translate/impl/simd_three_same_extra.cpp

@@ -0,0 +1,56 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#include "frontend/A64/translate/impl/impl.h"
+
+namespace Dynarmic::A64 {
+namespace {
+
+using ExtensionFunction = IR::U32 (IREmitter::*)(const IR::UAny&);
+
+bool DotProduct(TranslatorVisitor& v, bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd,
+                ExtensionFunction extension) {
+    if (size != 0b10) {
+        return v.ReservedValue();
+    }
+
+    const size_t esize = 8 << size.ZeroExtend();
+    const size_t datasize = Q ? 128 : 64;
+    const size_t elements = datasize / esize;
+
+    const IR::U128 operand1 = v.V(datasize, Vn);
+    const IR::U128 operand2 = v.V(datasize, Vm);
+    IR::U128 result = v.V(datasize, Vd);
+
+    for (size_t i = 0; i < elements; i++) {
+        IR::U32 res_element = v.ir.Imm32(0);
+
+        for (size_t j = 0; j < 4; j++) {
+            const IR::U32 elem1 = (v.ir.*extension)(v.ir.VectorGetElement(8, operand1, 4 * i + j));
+            const IR::U32 elem2 = (v.ir.*extension)(v.ir.VectorGetElement(8, operand2, 4 * i + j));
+
+            res_element = v.ir.Add(res_element, v.ir.Mul(elem1, elem2));
+        }
+
+        res_element = v.ir.Add(v.ir.VectorGetElement(32, result, i), res_element);
+        result = v.ir.VectorSetElement(32, result, i, res_element);
+    }
+
+    v.V(datasize, Vd, result);
+    return true;
+}
+
+} // Anonymous namespace
+
+bool TranslatorVisitor::SDOT_vec(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
+    return DotProduct(*this, Q, size, Vm, Vn, Vd, &IREmitter::SignExtendToWord);
+}
+
+bool TranslatorVisitor::UDOT_vec(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
+    return DotProduct(*this, Q, size, Vm, Vn, Vd, &IREmitter::ZeroExtendToWord);
+}
+
+} // namespace Dynarmic::A64