1 // Copyright 2016, 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 <stdio.h>
28 #include <stdint.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 #ifdef VIXL_DEBUG
39 static const int kDefaultIterationsCount = 10000;
40 #else
41 static const int kDefaultIterationsCount = 100000;
42 #endif
43
44 // This program focuses on the emission of branches and veneers.
benchmark(int iterations,InstructionSet isa)45 void benchmark(int iterations, 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 Label target_1, target_2, target_3, target_4;
56 for (int i = 0; i < iterations; i++) {
57 __ B(&target_1);
58 }
59 __ Bind(&target_1);
60 for (int i = 0; i < iterations; i++) {
61 __ B(eq, &target_2);
62 }
63 __ Bind(&target_2);
64 for (int i = 0; i < iterations; i++) {
65 __ Bl(&target_3);
66 }
67 __ Bind(&target_3);
68 for (int i = 0; i < iterations; i++) {
69 __ Blx(&target_4);
70 }
71 __ Bind(&target_4);
72
73 masm.FinalizeCode();
74 timeval end;
75 gettimeofday(&end, NULL);
76 double delta = (end.tv_sec - start.tv_sec) +
77 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
78 printf("%s: time for %d iterations: %gs\n",
79 isa == T32 ? "T32" : "A32",
80 iterations,
81 delta);
82 }
83
84
main(int argc,char * argv[])85 int main(int argc, char* argv[]) {
86 int iterations = 0;
87
88 switch (argc) {
89 case 1:
90 iterations = kDefaultIterationsCount;
91 break;
92 case 2:
93 iterations = atoi(argv[1]);
94 break;
95 default:
96 printf("Usage: %s [#iterations]\n", argv[0]);
97 exit(1);
98 }
99
100 #ifdef VIXL_INCLUDE_TARGET_A32
101 benchmark(iterations, A32);
102 #endif
103 #ifdef VIXL_INCLUDE_TARGET_T32
104 benchmark(iterations, T32);
105 #endif
106
107 return 0;
108 }
109