Added asmjit_test_perf, which replaces asmjit_bench and provides much better performance overview

Removed asmjit_test_opcode (not needed anymore as we have asmjit_test_assembler and asmjit_test_perf)

test/asmjit_test_perf.cpp

@@ -0,0 +1,69 @@
+// AsmJit - Machine code generation for C++
+//
+//  * Official AsmJit Home Page: https://asmjit.com
+//  * Official Github Repository: https://github.com/asmjit/asmjit
+//
+// Copyright (c) 2008-2020 The AsmJit Authors
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#include <asmjit/core.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cmdline.h"
+
+using namespace asmjit;
+
+#if defined(ASMJIT_BUILD_X86)
+void benchmarkX86Emitters(uint32_t numIterations, bool testX86, bool testX64) noexcept;
+#endif
+
+int main(int argc, char* argv[]) {
+  CmdLine cmdLine(argc, argv);
+  uint32_t numIterations = 20000;
+
+  printf("AsmJit Performance Suite v%u.%u.%u:\n\n",
+    unsigned((ASMJIT_LIBRARY_VERSION >> 16)       ),
+    unsigned((ASMJIT_LIBRARY_VERSION >>  8) & 0xFF),
+    unsigned((ASMJIT_LIBRARY_VERSION      ) & 0xFF));
+
+  printf("Usage:\n");
+  printf("  --help        Show usage only\n");
+  printf("  --quick       Decrease the number of iterations to make tests quicker\n");
+  printf("  --arch=<ARCH> Select architecture to run ('all' by default)\n");
+  printf("\n");
+
+  if (cmdLine.hasArg("--help"))
+    return 0;
+
+  if (cmdLine.hasArg("--quick"))
+    numIterations = 1000;
+
+  const char* arch = cmdLine.valueOf("--arch", "all");
+
+#if defined(ASMJIT_BUILD_X86)
+  bool testX86 = strcmp(arch, "all") == 0 || strcmp(arch, "x86") == 0;
+  bool testX64 = strcmp(arch, "all") == 0 || strcmp(arch, "x64") == 0;
+
+  if (testX86 || testX64)
+    benchmarkX86Emitters(numIterations, testX86, testX64);
+#endif
+
+  return 0;
+}