1// Copyright 2014, ARM Limited
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3//
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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 BUF_SIZE (4096)
30#define __ masm->
31
32void GenerateAdd4Double(MacroAssembler* masm) {
33  // double Add4Double(uint64_t a, double b, uint64_t c, double d)
34  //  Argument locations:
35  //    a -> x0
36  //    b -> d0
37  //    c -> x1
38  //    d -> d1
39
40  // Turn 'a' and 'c' into double values.
41  __ Ucvtf(d2, x0);
42  __ Ucvtf(d3, x1);
43
44  // Add everything together.
45  __ Fadd(d0, d0, d1);
46  __ Fadd(d2, d2, d3);
47  __ Fadd(d0, d0, d2);
48
49  // The return value is in d0.
50  __ Ret();
51}
52
53
54#ifndef TEST_EXAMPLES
55#ifdef VIXL_INCLUDE_SIMULATOR
56int main(void) {
57  // Create and initialize the assembler and the simulator.
58  byte assm_buf[BUF_SIZE];
59  MacroAssembler masm(assm_buf, BUF_SIZE);
60  Decoder decoder;
61  Simulator simulator(&decoder);
62
63  // Generate the code for the example function.
64  Label add4_double;
65  masm.Bind(&add4_double);
66  GenerateAdd4Double(&masm);
67  masm.FinalizeCode();
68
69  // Run the example function.
70  uint64_t a = 21;
71  double b = 987.3654;
72  uint64_t c = 4387;
73  double d = 36.698754;
74  simulator.set_xreg(0, a);
75  simulator.set_dreg(0, b);
76  simulator.set_xreg(1, c);
77  simulator.set_dreg(1, d);
78  simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&add4_double));
79  printf("%ld + %f + %ld + %f = %f\n", a, b, c, d, simulator.dreg(0));
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
87#endif  // TEST_EXAMPLES
88