Fixed AVX/XOP bugs when encoding instruction that uses register(s) with index greater than 7.

Refactored a bit testing code and added ability to asmjit_test_opcode to use registers having indexes greater than 7.

src/test/asmjit_test_opcode.cpp

@@ -0,0 +1,75 @@
+// [AsmJit]
+// Complete x86/x64 JIT and Remote Assembler for C++.
+//
+// [License]
+// Zlib - See LICENSE.md file in the package.
+
+// This file is used to test opcodes generated by AsmJit. Output can be
+// disassembled in your IDE or by your favourite disassembler. Instructions
+// are grouped by category and then sorted alphabetically.
+
+// [Dependencies - AsmJit]
+#include "../asmjit/asmjit.h"
+
+// [Dependencies - Test]
+#include "./asmjit_test_opcode.h"
+
+// [Dependencies - C]
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef void (*VoidFunc)(void);
+
+struct OpcodeDumpInfo {
+  uint32_t arch;
+  bool useRex;
+};
+
+static const char* archIdToString(uint32_t archId) {
+  switch (archId) {
+    case asmjit::kArchNone: return "None";
+    case asmjit::kArchX86: return "X86";
+    case asmjit::kArchX64: return "X64";
+    case asmjit::kArchArm: return "ARM";
+    default: return "<unknown>";
+  }
+}
+
+int main(int argc, char* argv[]) {
+  asmjit::FileLogger logger(stdout);
+  logger.setOption(asmjit::kLoggerOptionBinaryForm, true);
+
+  OpcodeDumpInfo infoList[] = {
+# if defined(ASMJIT_BUILD_X86)
+    { asmjit::kArchX86, false },
+# endif // ASMJIT_BUILD_X86
+# if defined(ASMJIT_BUILD_X64)
+    { asmjit::kArchX64, false },
+    { asmjit::kArchX64, true  }
+# endif // ASMJIT_BUILD_X64
+  };
+
+  for (int i = 0; i < ASMJIT_ARRAY_SIZE(infoList); i++) {
+    const OpcodeDumpInfo& info = infoList[i];
+
+    printf("Opcodes [ARCH=%s REX=%s]\n",
+      archIdToString(info.arch),
+      info.useRex ? "true" : "false");
+
+    asmjit::JitRuntime runtime;
+    asmjit::X86Assembler a(&runtime, info.arch);
+    a.setLogger(&logger);
+
+    asmgen::opcode(a, info.useRex);
+    VoidFunc p = asmjit_cast<VoidFunc>(a.make());
+
+    // Only run if disassembly makes sense.
+    if (info.arch == asmjit::kArchHost)
+      p();
+
+    runtime.release((void*)p);
+  }
+
+  return 0;
+}