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 "globals-vixl.h"
28
29 #include "aarch64/instructions-aarch64.h"
30 #include "aarch64/macro-assembler-aarch64.h"
31 #include "aarch64/simulator-aarch64.h"
32
33 #include "bench-utils.h"
34
35 #ifdef VIXL_INCLUDE_SIMULATOR_AARCH64
36
37 using namespace vixl;
38 using namespace vixl::aarch64;
39
40 // Like PrintDisassembler, but to prevent the I/O overhead from dominating the
41 // benchmark, don't actually print anything.
42 class BenchDisassembler : public Disassembler {
43 public:
BenchDisassembler()44 BenchDisassembler() : Disassembler(), generated_chars_(0) {}
45
GetGeneratedCharCount() const46 size_t GetGeneratedCharCount() const { return generated_chars_; }
47
48 protected:
ProcessOutput(const Instruction * instr)49 virtual void ProcessOutput(const Instruction* instr) VIXL_OVERRIDE {
50 USE(instr);
51 generated_chars_ += strlen(GetOutput());
52 }
53
54 size_t generated_chars_;
55 };
56
57 // This program measures the performance of the disassembler, using the same
58 // code sequence used in bench-mixed-masm.cc.
main(int argc,char * argv[])59 int main(int argc, char* argv[]) {
60 BenchCLI cli(argc, argv);
61 if (cli.ShouldExitEarly()) return cli.GetExitCode();
62
63 const size_t buffer_size = 256 * KBytes;
64 MacroAssembler masm(buffer_size);
65 masm.SetCPUFeatures(CPUFeatures::All());
66 BenchCodeGenerator generator(&masm);
67
68 masm.Reset();
69 generator.Generate(buffer_size);
70 masm.FinalizeCode();
71
72 const Instruction* start =
73 masm.GetBuffer()->GetStartAddress<const Instruction*>();
74
75 Decoder decoder;
76 Simulator simulator(&decoder);
77 simulator.SetCPUFeatures(CPUFeatures::All());
78
79 BenchTimer timer;
80
81 size_t iterations = 0;
82 do {
83 simulator.RunFrom(start);
84 iterations++;
85 } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
86
87 cli.PrintResults(iterations, timer.GetElapsedSeconds());
88 return cli.GetExitCode();
89 }
90
91 #else // VIXL_INCLUDE_SIMULATOR_AARCH64
main(void)92 int main(void) {
93 printf("This benchmark requires AArch64 simulator support.\n");
94 return EXIT_FAILURE;
95 }
96 #endif // VIXL_INCLUDE_SIMULATOR_AARCH64
97