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 "examples.h" 28 29#include "aarch64/disasm-aarch64.h" 30#include "aarch64/macro-assembler-aarch64.h" 31#include "aarch64/simulator-aarch64.h" 32 33#ifdef VIXL_SIMULATED_RUNTIME_CALL_SUPPORT 34 35#define __ masm-> 36 37int32_t add_int32s(int32_t a, int32_t b) { 38 printf("add_int32s(%d, %d)\n", a, b); 39 return a + b; 40} 41 42float int32_to_float(int32_t value) { 43 printf("int32_to_float(%d)\n", value); 44 return static_cast<float>(value); 45} 46 47int32_t float_to_int32(float value) { 48 printf("float_to_int32(%f)\n", value); 49 return static_cast<int32_t>(value); 50} 51 52void overload_function(float value) { 53 printf("overload_function(float %f)\n", value); 54} 55 56void overload_function(int32_t value) { 57 printf("overload_function(int32_t %d)\n", value); 58} 59 60void GenerateRuntimeCallExamples(MacroAssembler* masm) { 61 // The arguments are expected in the appropriate registers (following the 62 // Aarch64 ABI). 63 __ CallRuntime(add_int32s); 64 // The result is in `w0`, as per the ABI. 65 // Of course, one can use assembly to work with the results. 66 __ Lsl(w0, w0, 2); 67 __ CallRuntime(int32_to_float); 68 // The result is in `s0`. 69 // `CallRuntime` can infer template arguments when the call is not ambiguous. 70 // Otherwise the template arguments must be specified in the form: 71 // `__ CallRuntime<return_type, parameter_type_0, parameter_type_1, ...>();` 72 __ CallRuntime<void, float>(overload_function); 73 __ CallRuntime(float_to_int32); 74 __ CallRuntime<void, int32_t>(overload_function); 75 __ Ret(); 76} 77 78 79#ifndef TEST_EXAMPLES 80#ifdef VIXL_INCLUDE_SIMULATOR_AARCH64 81 82int main(void) { 83 MacroAssembler masm; 84 85 // Generate the code for the example function. 86 Label call_runtime_add_floats; 87 masm.Bind(&call_runtime_add_floats); 88 GenerateRuntimeCallExamples(&masm); 89 masm.FinalizeCode(); 90 91 Instruction* start = 92 masm.GetLabelAddress<Instruction*>(&call_runtime_add_floats); 93 94 // Disassemble the generated code. 95 PrintDisassembler disassembler(stdout); 96 disassembler.DisassembleBuffer(start, masm.GetSizeOfCodeGenerated()); 97 98 Decoder decoder; 99 Simulator simulator(&decoder); 100 101 int32_t input_a = 1; 102 int32_t input_b = 2; 103 simulator.WriteWRegister(0, input_a); 104 simulator.WriteWRegister(1, input_b); 105 simulator.RunFrom(start); 106 printf("The final result is %d\n", simulator.ReadWRegister(0)); 107 108 return 0; 109} 110#else 111// TODO: Support running natively. 112int main(void) { return 0; } 113#endif // VIXL_INCLUDE_SIMULATOR_AARCH64 114#endif // TEST_EXAMPLES 115#else 116#ifndef TEST_EXAMPLES 117int main(void) { return 0; } 118#endif // TEST_EXAMPLES 119#endif // VIXL_SIMULATED_RUNTIME_CALL_SUPPORT 120