xref: /third_party/vixl/benchmarks/aarch64/bench-dataop.cc

// Copyright 2019, VIXL authors
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//
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//
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#include "bench-utils.h"
#include "globals-vixl.h"

#include "aarch64/instructions-aarch64.h"
#include "aarch64/macro-assembler-aarch64.h"

using namespace vixl;
using namespace vixl::aarch64;

// This program focuses on emitting simple instructions.
//
// This code will emit a given number of 'add x0, x1, x2' in a fixed size
// buffer, looping over the buffer if necessary. This code therefore focuses
// on Emit and Operand.
int main(int argc, char* argv[]) {
  BenchCLI cli(argc, argv);
  if (cli.ShouldExitEarly()) return cli.GetExitCode();

  const size_t buffer_size = 256 * KBytes;
  const size_t buffer_instruction_count = buffer_size / kInstructionSize;
  MacroAssembler masm(buffer_size);

  BenchTimer timer;

  size_t iterations = 0;
  do {
    masm.Reset();
    {
      ExactAssemblyScope scope(&masm, buffer_size);
      for (size_t i = 0; i < buffer_instruction_count; ++i) {
        masm.add(x0, x1, Operand(x2));
      }
    }
    masm.FinalizeCode();
    iterations++;
  } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));

  cli.PrintResults(iterations, timer.GetElapsedSeconds());
  return cli.GetExitCode();
}