1// Copyright 2014, 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
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20// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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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 GenerateAdd3Double(MacroAssembler* masm) {
32  // double add3_double(double x, double y, double z)
33  //  Argument locations:
34  //    x -> d0
35  //    y -> d1
36  //    z -> d2
37  __ Fadd(d0, d0, d1);  // d0 <- x + y
38  __ Fadd(d0, d0, d2);  // d0 <- d0 + z
39
40  // The return value is already in d0.
41  __ Ret();
42}
43
44
45#ifndef TEST_EXAMPLES
46#ifdef VIXL_INCLUDE_SIMULATOR_AARCH64
47int main(void) {
48  MacroAssembler masm;
49  Decoder decoder;
50  Simulator simulator(&decoder);
51
52  // Generate the code for the example function.
53  Label add3_double;
54  masm.Bind(&add3_double);
55  GenerateAdd3Double(&masm);
56  masm.FinalizeCode();
57
58  // Run the example function.
59  double a = 498.36547;
60  double b = 23.369;
61  double c = 7964.697954;
62  simulator.WriteDRegister(0, a);
63  simulator.WriteDRegister(1, b);
64  simulator.WriteDRegister(2, c);
65  simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&add3_double));
66  printf("%f + %f + %f = %f\n", a, b, c, simulator.ReadDRegister(0));
67
68  return 0;
69}
70#else
71// Without the simulator there is nothing to test.
72int main(void) { return 0; }
73#endif  // VIXL_INCLUDE_SIMULATOR_AARCH64
74#endif  // TEST_EXAMPLES
75