rtaichi_attr_impl 0.0.2+1.3.0

Rust language binding to the Taichi Runtime C-API.
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

use std::collections::HashMap;

use syn::{visit::Visit, ItemFn, Block};

use crate::{error::ErrorStore, instr::{Instr, Operand, InstrId, parse_instrs}, arg::parse_arg, abort};

pub struct Kernel {
    pub name: String,
    pub instrs: Vec<Instr>,
}
impl Kernel {
    pub fn new(name: String) -> Self {
        Self {
            name,
            // Instruction #0 is reserved. For simplicity it points to a nop.
            instrs: vec![Instr::new(InstrId(0), Operand::Nop{})],
        }
    }

    pub fn create_instr(&mut self, operand: Operand) -> InstrId {
        let id = InstrId(self.instrs.len());
        let instr = Instr { id, operand };
        self.instrs.push(instr);
        id
    }
}

struct KernelParser<'ast> {
    es: &'ast mut ErrorStore,
    f: Kernel,
    bindings: HashMap<String, InstrId>,
}
impl<'ast> Visit<'ast> for  KernelParser<'ast> {
    fn visit_fn_arg(&mut self, i: &'ast syn::FnArg) {
        if let Some(arg) = parse_arg(self.es, i) {
            let id = self.f.create_instr(Operand::Arg {
                name: arg.name.clone(),
                ty: arg.ty
            });
            self.bindings.insert(arg.name, id);
        } else {
            abort!(self.es => (i, "failed to parse function arg"));
        }
    }
    fn visit_block(&mut self, i: &'ast Block) {
        parse_instrs(self.es, &mut self.f, self.bindings.clone(), i);
    }
}

pub fn parse_kernel<'ast>(es: &'ast mut ErrorStore, i: &'ast ItemFn) -> Kernel {
    let fn_name = i.sig.ident.to_string();
    let mut parser = KernelParser {
        es,
        f: Kernel::new(fn_name),
        bindings: HashMap::new(),
    };
    parser.visit_item_fn(i);
    parser.f
}

#[cfg(test)]
mod tests {
    use proc_macro2::TokenStream;
    use quote::quote;
    use taichi_runtime as ti;
    use crate::arg_ty::KernelArgType;

    use super::*;

    fn parse_test_kernel(tt: TokenStream) -> Kernel {
        let i: ItemFn = syn::parse2(tt).unwrap();

        let mut es = ErrorStore::new();
        let kernel = parse_kernel(&mut es, &i);
        kernel
    }

    #[test]
    fn test_empty_fn() {
        let kernel = parse_test_kernel(quote!(
            fn f() {}
        ));
        assert_eq!(kernel.name, "f");

        for instr in kernel.instrs {
            match instr {
                Instr {
                    id: InstrId(0),
                    operand: Operand::Nop {},
                } => {},
                Instr {
                    id: InstrId(1),
                    operand: Operand::Block {
                        instrs,
                    },
                } => {
                    assert_eq!(instrs, vec![]);
                },
                _ => panic!(),
            }
        }
    }

    #[test]
    fn test_arg_fn() {
        let kernel = parse_test_kernel(quote!(
            fn foo(a: i32, b: f32, #[ti(ndim=2)] c: NdArray<i32>) {}
        ));
        assert_eq!(kernel.name, "foo");

        for instr in kernel.instrs {
            match instr {
                Instr {
                    id: InstrId(0),
                    operand: Operand::Nop {},
                } => {},
                Instr {
                    id: InstrId(1),
                    operand: Operand::Arg {
                        name,
                        ty: KernelArgType::Scalar {
                            dtype: ti::DataType::I32,
                        },
                    },
                } if name == "a" => {},
                Instr {
                    id: InstrId(2),
                    operand: Operand::Arg {
                        name,
                        ty: KernelArgType::Scalar {
                            dtype: ti::DataType::F32,
                        },
                    },
                } if name == "b" => {},
                Instr {
                    id: InstrId(3),
                    operand: Operand::Arg {
                        name,
                        ty: KernelArgType::NdArray {
                            dtype: ti::DataType::I32,
                            ndim: Some(2),
                        },
                    },
                } if name == "c" => {},
                Instr {
                    id: InstrId(4),
                    operand: Operand::Block {
                        instrs,
                    },
                } => {
                    assert_eq!(instrs, vec![]);
                },
                _ => panic!("{instr:?}"),
            }
        }
    }
}