1// Copyright 2016, VIXL authors
2// All rights reserved.
3//
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5// modification, are permitted provided that the following conditions are met:
6//
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10//     this list of conditions and the following disclaimer in the documentation
11//     and/or other materials provided with the distribution.
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15//
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25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27#include "examples.h"
28
29#define __ masm->
30
31void 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
42int 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) = memory.GetEntryPoint<uint32_t (*)(
61      uint32_t)>(demo, masm.GetInstructionSetInUse());
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