1 // Copyright 2019, VIXL authors
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are met:
6 //
7 // * Redistributions of source code must retain the above copyright notice,
8 // this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above copyright notice,
10 // this list of conditions and the following disclaimer in the documentation
11 // and/or other materials provided with the distribution.
12 // * Neither the name of ARM Limited nor the names of its contributors may be
13 // used to endorse or promote products derived from this software without
14 // specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
20 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 #include "bench-utils.h"
28 #include "globals-vixl.h"
29
30 #include "aarch64/instructions-aarch64.h"
31 #include "aarch64/macro-assembler-aarch64.h"
32 #include "aarch64/simulator-aarch64.h"
33
34 #ifdef VIXL_INCLUDE_SIMULATOR_AARCH64
35
36 using namespace vixl;
37 using namespace vixl::aarch64;
38
39 // Like PrintDisassembler, but to prevent the I/O overhead from dominating the
40 // benchmark, don't actually print anything.
41 class BenchDisassembler : public Disassembler {
42 public:
BenchDisassembler()43 BenchDisassembler() : Disassembler(), generated_chars_(0) {}
44
GetGeneratedCharCount() const45 size_t GetGeneratedCharCount() const { return generated_chars_; }
46
47 protected:
48 virtual void ProcessOutput(const Instruction* instr) VIXL_OVERRIDE {
49 USE(instr);
50 generated_chars_ += strlen(GetOutput());
51 }
52
53 size_t generated_chars_;
54 };
55
56 // This program measures the performance of the disassembler, using the same
57 // code sequence used in bench-mixed-masm.cc.
main(int argc, char* argv[])58 int main(int argc, char* argv[]) {
59 BenchCLI cli(argc, argv);
60 if (cli.ShouldExitEarly()) return cli.GetExitCode();
61
62 const size_t buffer_size = 256 * KBytes;
63 MacroAssembler masm(buffer_size);
64 masm.SetCPUFeatures(CPUFeatures::All());
65 BenchCodeGenerator generator(&masm);
66
67 masm.Reset();
68 generator.Generate(buffer_size);
69 masm.FinalizeCode();
70
71 const Instruction* start =
72 masm.GetBuffer()->GetStartAddress<const Instruction*>();
73
74 Decoder decoder;
75 Simulator simulator(&decoder);
76 simulator.SetCPUFeatures(CPUFeatures::All());
77
78 BenchTimer timer;
79
80 size_t iterations = 0;
81 do {
82 simulator.RunFrom(start);
83 iterations++;
84 } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
85
86 cli.PrintResults(iterations, timer.GetElapsedSeconds());
87 return cli.GetExitCode();
88 }
89
90 #else // VIXL_INCLUDE_SIMULATOR_AARCH64
main(void)91 int main(void) {
92 printf("This benchmark requires AArch64 simulator support.\n");
93 return EXIT_FAILURE;
94 }
95 #endif // VIXL_INCLUDE_SIMULATOR_AARCH64
96