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 35using namespace vixl; 36using namespace vixl::aarch32; 37 38#ifdef VIXL_DEBUG 39static const int kDefaultIterationsCount = 10000; 40#else 41static const int kDefaultIterationsCount = 100000; 42#endif 43 44// This program focuses on the emission of branches and veneers. 45void 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 85int 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