1 // Copyright 2015, ARM Limited
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 "vixl/a64/macro-assembler-a64.h"
28 #include "vixl/a64/instructions-a64.h"
29 #include "vixl/globals.h"
30
31 using namespace vixl;
32
33 static const int kDefaultInstructionCount = 100000;
34
35 // Bind many branches to the same label, like bench-branch.cc but with a single
36 // label. This stresses the label-linking mechanisms.
main(int argc,char * argv[])37 int main(int argc, char* argv[]) {
38 int instructions = 0;
39
40 switch (argc) {
41 case 1: instructions = kDefaultInstructionCount; break;
42 case 2: instructions = atoi(argv[1]); break;
43 default:
44 printf("Usage: %s [#instructions]\n", argv[0]);
45 exit(1);
46 }
47
48 MacroAssembler masm(instructions * kInstructionSize);
49 InstructionAccurateScope scope(&masm, instructions);
50
51 #define __ masm.
52
53 Label target;
54 for (int i = 0; i < instructions; i++) {
55 __ b(&target);
56 }
57 __ bind(&target);
58
59 masm.FinalizeCode();
60
61 return 0;
62 }
63