1// Copyright 2014, 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 "examples.h" 28 29#define __ masm-> 30 31void GenerateSwap4(MacroAssembler* masm) { 32 // VIXL's macro assembler provides some functions to manipulate the stack. 33 // This example shows some of these functions. 34 __ Claim(16); 35 __ Poke(x0, 0); 36 __ Poke(x1, 8); 37 __ Push(x3, x2); 38 39 __ Pop(x1, x0); 40 __ Peek(x3, 0); 41 __ Peek(x2, 8); 42 __ Drop(16); 43 44 __ Ret(); 45} 46 47 48#ifndef TEST_EXAMPLES 49#ifdef VIXL_INCLUDE_SIMULATOR_AARCH64 50int main(void) { 51 MacroAssembler masm; 52 Decoder decoder; 53 Simulator simulator(&decoder); 54 55 // Generate the code for the example function. 56 Label swap4; 57 masm.Bind(&swap4); 58 GenerateSwap4(&masm); 59 masm.FinalizeCode(); 60 61 // Run the example function. 62 simulator.WriteXRegister(0, 0x1111111111111111); 63 simulator.WriteXRegister(1, 0x2222222222222222); 64 simulator.WriteXRegister(2, 0x3333333333333333); 65 simulator.WriteXRegister(3, 0x4444444444444444); 66 67 // clang-format off 68 printf("Before swap4:\n" 69 "x0 = 0x%" PRIx64 "\n" 70 "x1 = 0x%" PRIx64 "\n" 71 "x2 = 0x%" PRIx64 "\n" 72 "x3 = 0x%" PRIx64 "\n", 73 simulator.ReadXRegister(0), simulator.ReadXRegister(1), 74 simulator.ReadXRegister(2), simulator.ReadXRegister(3)); 75 // clang-format on 76 77 simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&swap4)); 78 79 // clang-format off 80 printf("After swap4:\n" 81 "x0 = 0x%" PRIx64 "\n" 82 "x1 = 0x%" PRIx64 "\n" 83 "x2 = 0x%" PRIx64 "\n" 84 "x3 = 0x%" PRIx64 "\n", 85 simulator.ReadXRegister(0), simulator.ReadXRegister(1), 86 simulator.ReadXRegister(2), simulator.ReadXRegister(3)); 87 // clang-format on 88 89 return 0; 90} 91#else 92// Without the simulator there is nothing to test. 93int main(void) { return 0; } 94#endif // VIXL_INCLUDE_SIMULATOR_AARCH64 95#endif // TEST_EXAMPLES 96