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26
27#include "examples.h"
28
29#define BUF_SIZE (4096)
30#define __ masm->
31
32void 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
50int 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