1 // Copyright 2014, ARM Limited
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26
27 #include "examples.h"
28
29 #define BUF_SIZE (4096)
30 #define __ masm->
31
GenerateAdd4Double(MacroAssembler * masm)32 void 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 USE_SIMULATOR
main(void)56 int 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.
main(void)85 int main(void) { return 0; }
86 #endif // USE_SIMULATOR
87 #endif // TEST_EXAMPLES
88