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
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 #define __ masm->
30
GenerateAdd3Double(MacroAssembler * masm)31 void 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
main(void)47 int 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.
main(void)72 int main(void) { return 0; }
73 #endif // VIXL_INCLUDE_SIMULATOR_AARCH64
74 #endif // TEST_EXAMPLES
75