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 using namespace vixl;
30 using namespace vixl::aarch32;
31
32 #define __ masm->
33
GenerateDemo(MacroAssembler * masm)34 void GenerateDemo(MacroAssembler* masm) {
35 // uint32_t demo(uint32_t x)
36
37 // Load a constant in r1 using the literal pool.
38 __ Ldr(r1, 0x12345678);
39 __ And(r0, r0, r1);
40 __ Bx(lr);
41 }
42
43
44 #ifndef TEST_EXAMPLES
main()45 int main() {
46 MacroAssembler masm;
47 // Generate the code for the example function.
48 Label demo;
49 // Tell the macro assembler that the label "demo" refer to the current
50 // location in the buffer.
51 masm.Bind(&demo);
52 GenerateDemo(&masm);
53 // Ensure that everything is generated and that the generated buffer is
54 // ready to use.
55 masm.FinalizeCode();
56 #ifdef VIXL_INCLUDE_SIMULATOR_AARCH32
57 // There is no simulator defined for VIXL AArch32.
58 #else
59 byte* code = masm.GetBuffer()->GetStartAddress<byte*>();
60 uint32_t code_size = masm.GetSizeOfCodeGenerated();
61 ExecutableMemory memory(code, code_size);
62 // Run the example function.
63 uint32_t (*demo_function)(uint32_t) =
64 memory
65 .GetEntryPoint<uint32_t (*)(uint32_t)>(demo,
66 masm.GetInstructionSetInUse());
67 uint32_t input_value = 0x89abcdef;
68 uint32_t output_value = (*demo_function)(input_value);
69 printf("native: demo(0x%08x) = 0x%08x\n", input_value, output_value);
70 #endif
71 return 0;
72 }
73 #endif // TEST_EXAMPLES
74