1 // Copyright 2015, 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 <sys/time.h>
28 #include "globals-vixl.h"
29
30 #include "aarch64/instructions-aarch64.h"
31 #include "aarch64/macro-assembler-aarch64.h"
32
33 using namespace vixl::aarch64;
34
35 static const int kDefaultIterationsCount = 100000;
36
37 // This program focuses on the emission of branches and veneers.
main(int argc,char * argv[])38 int main(int argc, char* argv[]) {
39 int iterations = 0;
40
41 switch (argc) {
42 case 1:
43 iterations = kDefaultIterationsCount;
44 break;
45 case 2:
46 iterations = atoi(argv[1]);
47 break;
48 default:
49 printf("Usage: %s [#iterations]\n", argv[0]);
50 exit(1);
51 }
52
53 size_t base_buf_size = iterations * 4 * kInstructionSize;
54 timeval start;
55 gettimeofday(&start, NULL);
56 MacroAssembler masm(base_buf_size);
57
58 #define __ masm.
59
60 Label target_1, target_2, target_3, target_4;
61 for (int i = 0; i < iterations; i++) {
62 __ B(&target_1);
63 }
64 __ Bind(&target_1);
65 for (int i = 0; i < iterations; i++) {
66 __ B(eq, &target_2);
67 }
68 __ Bind(&target_2);
69 for (int i = 0; i < iterations; i++) {
70 __ Cbz(x2, &target_3);
71 }
72 __ Bind(&target_3);
73 for (int i = 0; i < iterations; i++) {
74 __ Tbz(x3, 2, &target_4);
75 }
76 __ Bind(&target_4);
77
78 masm.FinalizeCode();
79
80 timeval end;
81 gettimeofday(&end, NULL);
82 double delta = (end.tv_sec - start.tv_sec) +
83 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
84 printf("A64: time for %d iterations: %gs\n", iterations, delta);
85
86 return 0;
87 }
88