jazz_vm 0.1.5

The Jazz VM
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use super::executor::Executor;
use super::function::Function;
use super::basic_block::BasicBlock;
use super::opcode::OpCode;
use super::page_table::PageTable;
use super::program::{Program, NativeFunction};
use super::program_context::ProgramContext;
use super::jit::NoJit;

#[test]
fn test_sum() {
    const END: u64 = 100000;

    let mut pt = PageTable::new();
    pt.virtual_alloc(0x08000000);
    pt.write_u64(0x08000000, 0); // exclusive
    pt.write_u64(0x08000008, END); // inclusive

    let sum_fn = Function::from_basic_blocks(vec![
        BasicBlock::from_opcodes(vec![
            { OpCode::UIConst64(0, 0x08000000) },
            { OpCode::Load64(1, 0) },
            { OpCode::UIConst64(0, 0x08000008) },
            { OpCode::Load64(2, 0) },
            { OpCode::Branch(1) }
        ]),
        BasicBlock::from_opcodes(vec![
            { OpCode::UIGe(1, 2) },
            { OpCode::ConditionalBranch(3, 2)}
        ]),
        BasicBlock::from_opcodes(vec![
            { OpCode::UIConst64(0, 1) },
            { OpCode::UIAdd(0, 1) },
            { OpCode::Mov(1, 0) },
            { OpCode::UIAdd(1, 3) },
            { OpCode::Mov(3, 0) },
            { OpCode::Branch(1) }
        ]),
        BasicBlock::from_opcodes(vec![
            { OpCode::UIConst64(0, 0x08000016) },
            { OpCode::Store64(3, 0) },
            { OpCode::Return }
        ])
    ]);

    let executor = Executor::with_page_table(pt.clone());
    let program = Program::from_functions(vec! [
        sum_fn
    ]);
    executor.eval_program(&ProgramContext::new(&executor, program, None as Option<NoJit>), 0);

    let result = pt.read_u64(0x08000016).unwrap();
    assert_eq!(result, (1 + END) * END / 2);
}

#[test]
fn test_int_types() {
    let mut pt = PageTable::new();
    pt.virtual_alloc(0x08000000);

    let test_fn = Function::from_basic_blocks(vec! [
        BasicBlock::from_opcodes(vec! [
            { OpCode::SIConst64(1, -10) },
            { OpCode::SIConst64(2, 3) },
            { OpCode::SIAdd(1, 2) },
            { OpCode::SIMul(0, 2) },
            { OpCode::UIConst64(1, 0x08000000) },
            { OpCode::Store64(0, 1) },
            { OpCode::Return }
        ])
    ]);

    let executor = Executor::with_page_table(pt.clone());
    let program = Program::from_functions(vec! [
        test_fn
    ]);
    executor.eval_program(&ProgramContext::new(&executor, program, None as Option<NoJit>), 0);

    let result = pt.read_i64(0x08000000);
    assert_eq!(result, Some((-10 + 3) * 3));
}

#[test]
fn test_fp() {
    let mut pt = PageTable::new();
    pt.virtual_alloc(0x08000000);

    let test_fn = Function::from_basic_blocks(vec! [
        BasicBlock::from_opcodes(vec! [
            { OpCode::FConst64(1, ::std::f64::consts::PI) },
            { OpCode::FConst64(2, 2.0) },
            { OpCode::FMul(1, 2) },
            { OpCode::Mov(3, 0) },
            { OpCode::FConst64(0, 1.0) },
            { OpCode::FAdd(3, 0) },
            { OpCode::Mov(3, 0) },
            { OpCode::FConst64(0, 3.0) },
            { OpCode::FSub(3, 0) },
            { OpCode::Mov(3, 0) },
            { OpCode::FConst64(0, 0.7) },
            { OpCode::FDiv(3, 0) },
            { OpCode::Mov(3, 0) },
            { OpCode::UIConst64(0, 0x08000000) },
            { OpCode::Store64(3, 0)},
            { OpCode::Return }
        ])
    ]);

    let executor = Executor::with_page_table(pt.clone());
    let program = Program::from_functions(vec! [
        test_fn
    ]);
    executor.eval_program(&ProgramContext::new(&executor, program, None as Option<NoJit>), 0);

    let result = pt.read_f64(0x08000000).unwrap();
    assert!((result - (::std::f64::consts::PI * 2.0 + 1.0 - 3.0) / 0.7).abs() < 1e-12);
}

#[test]
fn test_fn_call() {
    use std::cell::RefCell;

    let result: RefCell<u64> = RefCell::new(0);

    let setter = |executor: &Executor| -> () {
        *result.borrow_mut() = executor.read_global(1);
    };

    let mut program = Program::from_functions(vec! [
        Function::from_basic_blocks(vec! [
            BasicBlock::from_opcodes(vec! [
                { OpCode::UIConst64(0, 42) },
                { OpCode::StoreGlobal(1, 0) },
                { OpCode::UIConst64(0, 99) },
                { OpCode::StoreGlobal(2, 0) },
                { OpCode::Call(1) },
                { OpCode::LoadGlobal(1, 0) },
                { OpCode::StoreGlobal(1, 1)},
                { OpCode::CallNative(0) },
                { OpCode::Return }
            ])
        ]),
        Function::from_basic_blocks(vec! [
            BasicBlock::from_opcodes(vec! [
                { OpCode::LoadGlobal(1, 1) },
                { OpCode::LoadGlobal(2, 2) },
                { OpCode::UIAdd(1, 2) },
                { OpCode::StoreGlobal(0, 0) },
                { OpCode::Return }
            ])
        ])
    ]);
    program.append_native_function(NativeFunction::new("set", &setter));

    let executor = Executor::new();
    executor.eval_program(&ProgramContext::new(&executor, program, None as Option<NoJit>), 0);

    assert_eq!(*result.borrow(), 42 + 99);
}