logicsim 0.1.7

composable, modular, digital logic simulation
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

use super::instruction_set::{Instruction, InstructionType};
use auto_from::From;
pub use logicsim::data_structures::BitIter;
#[derive(Debug, Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub enum PointerType {
    RAM,
    ROM,
}
#[derive(Debug, Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct Pointer(pub u8, pub PointerType);

#[derive(Debug, Clone, Copy, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct Label(pub usize);
#[derive(Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct InstructionWithPtr {
    ty: InstructionType,
    ptr: Pointer,
}
#[derive(Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct InstructionWithLabel {
    ty: InstructionType,
    label: Label,
}
pub trait IntoInstructionWithPointer {
    fn with_ptr(self, ptr: Pointer) -> InstructionWithPtr;
}
impl IntoInstructionWithPointer for InstructionType {
    fn with_ptr(self, ptr: Pointer) -> InstructionWithPtr {
        InstructionWithPtr { ty: self, ptr }
    }
}
pub trait IntoInstructionWithLabel {
    fn with_label(self, label: Label) -> InstructionWithLabel;
}
impl IntoInstructionWithLabel for InstructionType {
    fn with_label(self, label: Label) -> InstructionWithLabel {
        InstructionWithLabel { ty: self, label }
    }
}
#[derive(From, Debug)]
pub enum Directive {
    Instruction(Instruction),
    InstructionWithPtr(InstructionWithPtr),
    InstructionWithLabel(InstructionWithLabel),
    Data(u16),
}
impl From<InstructionType> for Directive {
    fn from(ty: InstructionType) -> Self {
        ty.with_0().into()
    }
}

pub fn byte_iter_to_directives<I: Iterator<Item = u8>>(iter: I) -> Vec<Directive> {
    let mut out = Vec::new();
    for bytes in iter.collect::<Vec<_>>().chunks(2) {
        let word = bytes[0] as u16 | ((bytes.get(1).copied().unwrap_or(0) as u16) << 8);
        out.push(Directive::Data(word))
    }
    out
}

macro_rules! assemble_inner {
    ($vec:ident, $labels:ident, label $label:ident; $($rest:tt)*) => {
        let $label = Label($labels.len());
        $labels.push(0);
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, data#$label:ident : $val:expr; $($rest:tt)*) => {
        $labels[$label.0] = ($vec.len() * 2) as u8;
        $vec.append(&mut byte_iter_to_directives($val));
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, $label:ident : $val:expr; $($rest:tt)*) => {
        $labels[$label.0] = ($vec.len() * 2) as u8;
        $vec.push($val.into());
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, $ptr:ident =ram= $val:expr; $($rest:tt)*) => {
        let $ptr = Pointer($val, PointerType::RAM);
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, $ptr:ident =rom= $val:expr; $($rest:tt)*) => {
        let $ptr = Pointer($val, PointerType::ROM);
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, $val:expr; $($rest:tt)*) => {
        $vec.push($val.into());
        assemble_inner!($vec, $labels, $($rest)*);
    };
    ($vec:ident, $labels:ident, ) => { };

}
macro_rules! assemble {
    ($($all:tt)*) => {
        {
            let mut directives = Vec::<Directive>::new();
            #[allow(unused_mut)]
            let mut labels = Vec::<u8>::new();
            assemble_inner!(directives, labels, $($all)*);
            assemble(directives, labels)
        }
    };
}
pub fn assemble(directives: Vec<Directive>, labels: Vec<u8>) -> Vec<u16> {
    let ram_mask = 1u8 << 7;
    let mut out = Vec::new();
    for directive in directives {
        match directive {
            Directive::Instruction(instruction) => out.push(instruction.into()),
            Directive::InstructionWithPtr(InstructionWithPtr { ty, ptr }) => out.push(
                Instruction {
                    ty,
                    data: ptr.0
                        | if matches!(ptr.1, PointerType::RAM) {
                            ram_mask
                        } else {
                            0
                        },
                }
                .into(),
            ),
            Directive::InstructionWithLabel(InstructionWithLabel { ty, label }) => out.push(
                Instruction {
                    ty,
                    data: labels[label.0],
                }
                .into(),
            ),
            Directive::Data(data) => out.push(data),
        }
    }
    assert!(
        out.len() * 2 <= 128,
        "Your program is too big! len:{}",
        out.len() * 2
    );
    out
}