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 #define __ masm-> 30 31 void GenerateDemo(MacroAssembler* masm) { 32 // uint32_t demo(uint32_t x) 33 34 // Load a constant in r1 using the literal pool. 35 __ Ldr(r1, 0x12345678); 36 __ And(r0, r0, r1); 37 __ Bx(lr); 38 } 39 40 41 #ifndef TEST_EXAMPLES 42 int main() { 43 MacroAssembler masm; 44 // Generate the code for the example function. 45 Label demo; 46 // Tell the macro assembler that the label "demo" refer to the current 47 // location in the buffer. 48 masm.Bind(&demo); 49 GenerateDemo(&masm); 50 // Ensure that everything is generated and that the generated buffer is 51 // ready to use. 52 masm.FinalizeCode(); 53 #ifdef VIXL_INCLUDE_SIMULATOR_AARCH32 54 // There is no simulator defined for VIXL AArch32. 55 #else 56 byte* code = masm.GetBuffer()->GetStartAddress<byte*>(); 57 uint32_t code_size = masm.GetSizeOfCodeGenerated(); 58 ExecutableMemory memory(code, code_size); 59 // Run the example function. 60 uint32_t (*demo_function)(uint32_t) = 61 memory.GetEntryPoint<uint32_t (*)(uint32_t)>(demo); 62 uint32_t input_value = 0x89abcdef; 63 uint32_t output_value = (*demo_function)(input_value); 64 printf("native: demo(0x%08x) = 0x%08x\n", input_value, output_value); 65 #endif 66 return 0; 67 } 68 #endif // TEST_EXAMPLES 69