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.h

@@ -0,0 +1,81 @@
+// 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.
+
+#ifndef ASMJIT_TEST_PERF_H_INCLUDED
+#define ASMJIT_TEST_PERF_H_INCLUDED
+
+#include <asmjit/core.h>
+#include "performancetimer.h"
+
+class MyErrorHandler : public asmjit::ErrorHandler {
+  void handleError(asmjit::Error err, const char* message, asmjit::BaseEmitter* origin) {
+    (void)err;
+    (void)origin;
+    printf("ERROR: %s\n", message);
+    abort();
+  }
+};
+
+template<typename EmitterT, typename FuncT>
+static void bench(asmjit::CodeHolder& code, uint32_t arch, uint32_t numIterations, const char* testName, const FuncT& func) noexcept {
+  EmitterT emitter;
+  MyErrorHandler eh;
+
+  const char* archName =
+    arch == asmjit::Environment::kArchX86 ? "X86" :
+    arch == asmjit::Environment::kArchX64 ? "X64" : "???";
+
+  const char* emitterName =
+    emitter.isAssembler() ? "Assembler" :
+    emitter.isCompiler()  ? "Compiler"  :
+    emitter.isBuilder()   ? "Builder"   : "Unknown";
+
+  uint64_t codeSize = 0;
+  asmjit::Environment env(arch);
+
+  PerformanceTimer timer;
+  double duration = std::numeric_limits<double>::infinity();
+
+  for (uint32_t r = 0; r < numIterations; r++) {
+    codeSize = 0;
+    code.init(env);
+    code.setErrorHandler(&eh);
+    code.attach(&emitter);
+
+    timer.start();
+    func(emitter);
+    timer.stop();
+
+    codeSize += code.codeSize();
+
+    code.reset();
+    duration = asmjit::Support::min(duration, timer.duration());
+  }
+
+  printf("  [%s] %-9s %-16s | CodeSize:%5llu [B] | Time:%8.4f [ms]", archName, emitterName, testName, (unsigned long long)codeSize, duration);
+  if (codeSize)
+    printf(" | Speed:%8.3f [MB/s]", mbps(duration, codeSize));
+  printf("\n");
+}
+
+#endif // ASMJIT_TEST_PERF_H_INCLUDED