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//
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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//
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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 GenerateAdd4Double(MacroAssembler* masm) {
32  // double Add4Double(uint64_t a, double b, uint64_t c, double d)
33  //  Argument locations:
34  //    a -> x0
35  //    b -> d0
36  //    c -> x1
37  //    d -> d1
38
39  // Turn 'a' and 'c' into double values.
40  __ Ucvtf(d2, x0);
41  __ Ucvtf(d3, x1);
42
43  // Add everything together.
44  __ Fadd(d0, d0, d1);
45  __ Fadd(d2, d2, d3);
46  __ Fadd(d0, d0, d2);
47
48  // The return value is in d0.
49  __ Ret();
50}
51
52
53#ifndef TEST_EXAMPLES
54#ifdef VIXL_INCLUDE_SIMULATOR_AARCH64
55int main(void) {
56  MacroAssembler masm;
57  Decoder decoder;
58  Simulator simulator(&decoder);
59
60  // Generate the code for the example function.
61  Label add4_double;
62  masm.Bind(&add4_double);
63  GenerateAdd4Double(&masm);
64  masm.FinalizeCode();
65
66  // Run the example function.
67  uint64_t a = 21;
68  double b = 987.3654;
69  uint64_t c = 4387;
70  double d = 36.698754;
71  simulator.WriteXRegister(0, a);
72  simulator.WriteDRegister(0, b);
73  simulator.WriteXRegister(1, c);
74  simulator.WriteDRegister(1, d);
75  simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&add4_double));
76  // clang-format off
77  printf("%" PRIu64 " + %f + %" PRIu64 " + %f = %f\n",
78         a, b, c, d, simulator.ReadDRegister(0));
79  // clang-format on
80
81  return 0;
82}
83#else
84// Without the simulator there is nothing to test.
85int main(void) { return 0; }
86#endif  // VIXL_INCLUDE_SIMULATOR_AARCH64
87#endif  // TEST_EXAMPLES
88