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71 lines
2.8 KiB
71 lines
2.8 KiB
7 months ago
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// Copyright 2019, VIXL authors
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "globals-vixl.h"
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#include "aarch64/instructions-aarch64.h"
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#include "aarch64/macro-assembler-aarch64.h"
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#include "bench-utils.h"
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using namespace vixl;
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using namespace vixl::aarch64;
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// This program focuses on emitting branch instructions targeting a label bound
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// very closely. Here the MacroAssembler is used. This exercises label binding
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// and patching mechanisms, as well as the veneer resolving mechanisms for
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// branches not requiring veneers.
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int main(int argc, char* argv[]) {
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BenchCLI cli(argc, argv);
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if (cli.ShouldExitEarly()) return cli.GetExitCode();
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const size_t buffer_size = 256 * KBytes;
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const size_t instructions_per_iteration = 4;
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const size_t max_buffer_iterations =
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buffer_size / (instructions_per_iteration * kInstructionSize);
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MacroAssembler masm(buffer_size);
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BenchTimer timer;
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size_t iterations = 0;
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do {
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masm.Reset();
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for (size_t i = 0; i < max_buffer_iterations; ++i) {
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Label target;
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masm.B(&target);
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masm.B(eq, &target);
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masm.Cbz(x2, &target);
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masm.Tbz(x3, 2, &target);
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masm.Bind(&target);
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}
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masm.FinalizeCode();
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iterations++;
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} while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
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cli.PrintResults(iterations, timer.GetElapsedSeconds());
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return cli.GetExitCode();
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}
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