modelc 0.1.0

Compile model weight files to standalone executable binaries
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

use std::collections::HashMap;

use half::bf16;
use half::f16;

use crate::model::{DataType, TensorData};
use crate::runtime::tensor::Tensor;

pub struct Runtime {
    tensors: HashMap<String, Tensor>,
}

fn bytes_to_f32_slice(td: &TensorData) -> Option<Vec<f32>> {
    let count = td.element_count();
    match td.dtype {
        DataType::F32 => {
            let byte_len = count * 4;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(4).enumerate() {
                out[i] = f32::from_le_bytes([chunk[0], chunk[1], chunk[2], chunk[3]]);
            }
            Some(out)
        }
        DataType::F16 => {
            let byte_len = count * 2;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(2).enumerate() {
                let bits = u16::from_le_bytes([chunk[0], chunk[1]]);
                out[i] = f16::from_bits(bits).to_f32();
            }
            Some(out)
        }
        DataType::BF16 => {
            let byte_len = count * 2;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(2).enumerate() {
                let bits = u16::from_le_bytes([chunk[0], chunk[1]]);
                out[i] = bf16::from_bits(bits).to_f32();
            }
            Some(out)
        }
        DataType::I64 => {
            let byte_len = count * 8;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(8).enumerate() {
                out[i] = i64::from_le_bytes([
                    chunk[0], chunk[1], chunk[2], chunk[3], chunk[4], chunk[5], chunk[6], chunk[7],
                ]) as f32;
            }
            Some(out)
        }
        DataType::I32 => {
            let byte_len = count * 4;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(4).enumerate() {
                out[i] = i32::from_le_bytes([chunk[0], chunk[1], chunk[2], chunk[3]]) as f32;
            }
            Some(out)
        }
        DataType::I16 => {
            let byte_len = count * 2;
            if td.data.len() < byte_len {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, chunk) in td.data[..byte_len].chunks_exact(2).enumerate() {
                out[i] = i16::from_le_bytes([chunk[0], chunk[1]]) as f32;
            }
            Some(out)
        }
        DataType::I8 => {
            if td.data.len() < count {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, &b) in td.data[..count].iter().enumerate() {
                out[i] = b as i8 as f32;
            }
            Some(out)
        }
        DataType::U8 => {
            if td.data.len() < count {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, &b) in td.data[..count].iter().enumerate() {
                out[i] = b as f32;
            }
            Some(out)
        }
        DataType::Bool => {
            if td.data.len() < count {
                return None;
            }
            let mut out = vec![0.0f32; count];
            for (i, &b) in td.data[..count].iter().enumerate() {
                out[i] = if b != 0 { 1.0 } else { 0.0 };
            }
            Some(out)
        }
    }
}

impl Runtime {
    pub fn from_raw(raw: &HashMap<String, TensorData>) -> Self {
        let mut tensors = HashMap::new();
        for (name, td) in raw {
            if let Some(fdata) = bytes_to_f32_slice(td) {
                tensors.insert(name.clone(), Tensor::from_vec(fdata, td.shape.clone()));
            }
        }
        Self { tensors }
    }

    pub fn get(&self, name: &str) -> Option<&Tensor> {
        self.tensors.get(name)
    }

    pub fn tensor_names(&self) -> Vec<&String> {
        let mut names: Vec<&String> = self.tensors.keys().collect();
        names.sort();
        names
    }
}