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
18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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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
GenerateAdd4Double(MacroAssembler * masm)31 void 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
main(void)55 int 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.
main(void)85 int main(void) { return 0; }
86 #endif // VIXL_INCLUDE_SIMULATOR_AARCH64
87 #endif // TEST_EXAMPLES
88