1 // Copyright 2015, ARM Limited 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 "vixl/a64/macro-assembler-a64.h" 28 #include "vixl/a64/instructions-a64.h" 29 #include "vixl/globals.h" 30 31 using namespace vixl; 32 33 static const int kDefaultInstructionCount = 100000; 34 35 // Bind many branches to the same label, like bench-branch.cc but with a single 36 // label. This stresses the label-linking mechanisms. 37 int main(int argc, char* argv[]) { 38 int instructions = 0; 39 40 switch (argc) { 41 case 1: instructions = kDefaultInstructionCount; break; 42 case 2: instructions = atoi(argv[1]); break; 43 default: 44 printf("Usage: %s [#instructions]\n", argv[0]); 45 exit(1); 46 } 47 48 MacroAssembler masm(instructions * kInstructionSize); 49 InstructionAccurateScope scope(&masm, instructions); 50 51 #define __ masm. 52 53 Label target; 54 for (int i = 0; i < instructions; i++) { 55 __ b(&target); 56 } 57 __ bind(&target); 58 59 masm.FinalizeCode(); 60 61 return 0; 62 } 63
