1 // Copyright 2013, ARM Limited
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 BUF_SIZE (4096)
30 #define __ masm->
31
GenerateSwap4(MacroAssembler * masm)32 void GenerateSwap4(MacroAssembler* masm) {
33 // VIXL's macro assembler provides some functions to manipulate the stack.
34 // This example shows some of these functions.
35 __ Claim(16);
36 __ Poke(x0, 0);
37 __ Poke(x1, 8);
38 __ Push(x3, x2);
39
40 __ Pop(x1, x0);
41 __ Peek(x3, 0);
42 __ Peek(x2, 8);
43 __ Drop(16);
44
45 __ Ret();
46 }
47
48
49 #ifndef TEST_EXAMPLES
main(void)50 int main(void) {
51 // Create and initialize the assembler and the simulator.
52 byte assm_buf[BUF_SIZE];
53 MacroAssembler masm(assm_buf, BUF_SIZE);
54 Decoder decoder;
55 Simulator simulator(&decoder);
56
57 // Generate the code for the example function.
58 Label swap4;
59 masm.Bind(&swap4);
60 GenerateSwap4(&masm);
61 masm.FinalizeCode();
62
63 // Run the example function.
64 simulator.set_xreg(0, 0x1111111111111111);
65 simulator.set_xreg(1, 0x2222222222222222);
66 simulator.set_xreg(2, 0x3333333333333333);
67 simulator.set_xreg(3, 0x4444444444444444);
68
69 printf("Before swap4:\n"
70 "x0 = 0x%" PRIx64 "\n"
71 "x1 = 0x%" PRIx64 "\n"
72 "x2 = 0x%" PRIx64 "\n"
73 "x3 = 0x%" PRIx64 "\n",
74 simulator.xreg(0), simulator.xreg(1),
75 simulator.xreg(2), simulator.xreg(3));
76
77 simulator.RunFrom(swap4.target());
78
79 printf("After swap4:\n"
80 "x0 = 0x%" PRIx64 "\n"
81 "x1 = 0x%" PRIx64 "\n"
82 "x2 = 0x%" PRIx64 "\n"
83 "x3 = 0x%" PRIx64 "\n",
84 simulator.xreg(0), simulator.xreg(1),
85 simulator.xreg(2), simulator.xreg(3));
86
87 return 0;
88 }
89 #endif
90