A32: Implement ASIMD VCLS/VCLZ/VCNT

src/frontend/A32/decoder/asimd.inc

@@ -80,9 +80,9 @@ INST(asimd_VQSUB,           "VQSUB",                    "1111001U0Dzznnnndddd001
 //INST(asimd_VREV32,          "VREV32",                   "111100111-11--00----00001x-0----") // ASIMD
 //INST(asimd_VREV16,          "VREV16",                   "111100111-11--00----00010x-0----") // ASIMD
 //INST(asimd_VPADDL,          "VPADDL",                   "111100111-11--00----0010xx-0----") // ASIMD
-//INST(asimd_VCLS,            "VCLS",                     "111100111-11--00----01000x-0----") // ASIMD
+INST(asimd_VCLS,            "VCLS",                     "111100111D11zz00dddd01000QM0mmmm") // ASIMD
-//INST(asimd_VCLZ,            "VCLZ",                     "111100111-11--00----01001x-0----") // ASIMD
+INST(asimd_VCLZ,            "VCLZ",                     "111100111D11zz00dddd01001QM0mmmm") // ASIMD
-//INST(asimd_VCNT,            "VCNT",                     "111100111-11--00----01010x-0----") // ASIMD
+INST(asimd_VCNT,            "VCNT",                     "111100111D11zz00dddd01010QM0mmmm") // ASIMD
 //INST(asimd_VMVN_reg,        "VMVN_reg",                 "111100111-11--00----01011x-0----") // ASIMD
 //INST(asimd_VPADAL,          "VPADAL",                   "111100111-11--00----0110xx-0----") // ASIMD
 //INST(asimd_VQABS,           "VQABS",                    "111100111-11--00----01110x-0----") // ASIMD

src/frontend/A32/translate/impl/asimd_two_regs_misc.cpp

@@ -9,6 +9,81 @@
 
 namespace Dynarmic::A32 {
 
+bool ArmTranslatorVisitor::asimd_VCLS(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm) {
+    if (sz == 0b11) {
+        return UndefinedInstruction();
+    }
+
+    if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
+        return UndefinedInstruction();
+    }
+
+    const auto d = ToVector(Q, Vd, D);
+    const auto m = ToVector(Q, Vm, M);
+    const auto result = [this, m, sz] {
+        const auto reg_m = ir.GetVector(m);
+        const size_t esize = 8U << sz;
+        const auto one = [this, esize]() -> IR::UAny {
+            switch (esize) {
+            case 8:
+                return ir.Imm8(1);
+            case 16:
+                return ir.Imm16(1);
+            default:
+                return ir.Imm32(1);
+            }
+        }();
+
+        const auto shifted = ir.VectorArithmeticShiftRight(esize, reg_m, static_cast<u8>(esize));
+        const auto xored = ir.VectorEor(reg_m, shifted);
+        const auto clz = ir.VectorCountLeadingZeros(esize, xored);
+        return ir.VectorSub(esize, clz, ir.VectorBroadcast(esize, one));
+    }();
+
+    ir.SetVector(d, result);
+    return true;
+}
+
+bool ArmTranslatorVisitor::asimd_VCLZ(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm) {
+    if (sz == 0b11) {
+        return UndefinedInstruction();
+    }
+
+    if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
+        return UndefinedInstruction();
+    }
+
+    const auto d = ToVector(Q, Vd, D);
+    const auto m = ToVector(Q, Vm, M);
+    const auto result = [this, m, sz] {
+        const auto reg_m = ir.GetVector(m);
+        const size_t esize = 8U << sz;
+
+        return ir.VectorCountLeadingZeros(esize, reg_m);
+    }();
+
+    ir.SetVector(d, result);
+    return true;
+}
+
+bool ArmTranslatorVisitor::asimd_VCNT(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm) {
+    if (sz != 0b00) {
+        return UndefinedInstruction();
+    }
+
+    if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
+        return UndefinedInstruction();
+    }
+
+    const auto d = ToVector(Q, Vd, D);
+    const auto m = ToVector(Q, Vm, M);
+    const auto reg_m = ir.GetVector(m);
+    const auto result = ir.VectorPopulationCount(reg_m);
+
+    ir.SetVector(d, result);
+    return true;
+}
+
 bool ArmTranslatorVisitor::asimd_VNEG(bool D, size_t sz, size_t Vd, bool F, bool Q, bool M, size_t Vm) {
     if (sz == 0b11 || (F && sz != 0b10)) {
         return UndefinedInstruction();

src/frontend/A32/translate/impl/translate_arm.h

@@ -449,6 +449,9 @@ struct ArmTranslatorVisitor final {
     bool asimd_VQSUB(bool U, bool D, size_t sz, size_t Vn, size_t Vd, bool N, bool Q, bool M, size_t Vm);
 
     // Advanced SIMD two register, miscellaneous
+    bool asimd_VCLS(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm);
+    bool asimd_VCLZ(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm);
+    bool asimd_VCNT(bool D, size_t sz, size_t Vd, bool Q, bool M, size_t Vm);
     bool asimd_VNEG(bool D, size_t sz, size_t Vd, bool F, bool Q, bool M, size_t Vm);
     bool asimd_VSWP(bool D, size_t Vd, bool Q, bool M, size_t Vm);