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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