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 37 int32_t add_int32s(int32_t a, int32_t b) { 38 printf("add_int32s(%d, %d)\n", a, b); 39 return a + b; 40 } 41 42 float int32_to_float(int32_t value) { 43 printf("int32_to_float(%d)\n", value); 44 return static_cast<float>(value); 45 } 46 47 int32_t float_to_int32(float value) { 48 printf("float_to_int32(%f)\n", value); 49 return static_cast<int32_t>(value); 50 } 51 52 void overload_function(float value) { 53 printf("overload_function(float %f)\n", value); 54 } 55 56 void overload_function(int32_t value) { 57 printf("overload_function(int32_t %d)\n", value); 58 } 59 60 void 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 82 int 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. 112 int main(void) { return 0; } 113 #endif // VIXL_INCLUDE_SIMULATOR_AARCH64 114 #endif // TEST_EXAMPLES 115 #else 116 #ifndef TEST_EXAMPLES 117 int main(void) { return 0; } 118 #endif // TEST_EXAMPLES 119 #endif // VIXL_SIMULATED_RUNTIME_CALL_SUPPORT 120