1 // Copyright 2017, 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 <stdint.h>
28 #include <stdio.h>
29 #include <sys/time.h>
30
31 #include "aarch32/constants-aarch32.h"
32 #include "aarch32/instructions-aarch32.h"
33 #include "aarch32/macro-assembler-aarch32.h"
34
35 using namespace vixl;
36 using namespace vixl::aarch32;
37
38 static const int kDefaultIterationCount = 1000;
39 static const int kDefaultLiteralCount = 100;
40
41 // This program focuses on emitting branch instructions targeting a label bound
42 // very closely. Here the MacroAssembler is used. This exercises label binding
43 // and patching mechanisms, as well as the veneer resolving mechanisms for
44 // branches not requiring veneers.
benchmark(int iterations,int literals,InstructionSet isa)45 void benchmark(int iterations, int literals, InstructionSet isa) {
46 const int buffer_size = 256 * KBytes;
47
48 timeval start;
49 gettimeofday(&start, NULL);
50 MacroAssembler masm(buffer_size);
51 masm.UseInstructionSet(isa);
52
53 #define __ masm.
54
55 // Load a number of distinct literals, for a number of iterations, forcing
56 // pool emission in between.
57 for (int i = 0; i < iterations; i++) {
58 for (int j = 0; j < literals; j++) {
59 __ Ldr(r0, j);
60 __ FinalizeCode();
61 }
62 }
63
64 timeval end;
65 gettimeofday(&end, NULL);
66 double delta = (end.tv_sec - start.tv_sec) +
67 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
68 printf("%s: time for %d iterations: %gs\n",
69 isa == T32 ? "T32" : "A32",
70 iterations,
71 delta);
72 }
73
74
main(int argc,char * argv[])75 int main(int argc, char* argv[]) {
76 int iterations = 0;
77 int literals = 0;
78
79 switch (argc) {
80 case 1:
81 iterations = kDefaultIterationCount;
82 literals = kDefaultLiteralCount;
83 break;
84 case 2:
85 iterations = atoi(argv[1]);
86 literals = kDefaultLiteralCount;
87 break;
88 case 3:
89 iterations = atoi(argv[1]);
90 literals = atoi(argv[2]);
91 break;
92 default:
93 printf("Usage: %s [#iterations] [#literals]\n", argv[0]);
94 exit(1);
95 }
96
97 #ifdef VIXL_INCLUDE_TARGET_A32
98 benchmark(iterations, literals, A32);
99 #endif
100 #ifdef VIXL_INCLUDE_TARGET_T32
101 benchmark(iterations, literals, T32);
102 #endif
103
104 return 0;
105 }
106