vyre-primitives 0.6.2

Compositional primitives for vyre - marker types (always on) + Tier 2.5 LEGO substrate (feature-gated per domain).
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

//! Shared u32 binary elementwise map builder for math primitives.

use std::sync::Arc;

use vyre_foundation::ir::model::expr::Ident;
use vyre_foundation::ir::{BufferAccess, BufferDecl, DataType, Expr, Node, Program};

/// Build `out[i] = op(lhs[i], rhs[i])` for `count` u32 lanes.
#[must_use]
pub(crate) fn u32_binary_map_program<F>(
    op_id: &'static str,
    lhs: &str,
    rhs: &str,
    out: &str,
    count: u32,
    op: F,
) -> Program
where
    F: Fn(Expr, Expr) -> Expr,
{
    let t = Expr::InvocationId { axis: 0 };
    let value = op(Expr::load(lhs, t.clone()), Expr::load(rhs, t.clone()));
    let body = vec![Node::if_then(
        Expr::lt(t.clone(), Expr::u32(count)),
        vec![Node::store(out, t, value)],
    )];

    Program::wrapped(
        vec![
            BufferDecl::storage(lhs, 0, BufferAccess::ReadOnly, DataType::U32).with_count(count),
            BufferDecl::storage(rhs, 1, BufferAccess::ReadOnly, DataType::U32).with_count(count),
            BufferDecl::storage(out, 2, BufferAccess::ReadWrite, DataType::U32).with_count(count),
        ],
        [256, 1, 1],
        vec![Node::Region {
            generator: Ident::from(op_id),
            source_region: None,
            body: Arc::new(body),
        }],
    )
}

/// Build `out[i] = op(vector[i], scalar[0])` for `count` u32 lanes.
#[must_use]
pub(crate) fn u32_vector_scalar_map_program<F>(
    op_id: &'static str,
    vector: &str,
    scalar: &str,
    out: &str,
    count: u32,
    op: F,
) -> Program
where
    F: Fn(Expr, Expr) -> Expr,
{
    let t = Expr::InvocationId { axis: 0 };
    let value = op(
        Expr::load(vector, t.clone()),
        Expr::load(scalar, Expr::u32(0)),
    );
    let body = vec![Node::if_then(
        Expr::lt(t.clone(), Expr::u32(count)),
        vec![Node::store(out, t, value)],
    )];

    Program::wrapped(
        vec![
            BufferDecl::storage(vector, 0, BufferAccess::ReadOnly, DataType::U32).with_count(count),
            BufferDecl::storage(scalar, 1, BufferAccess::ReadOnly, DataType::U32).with_count(1),
            BufferDecl::storage(out, 2, BufferAccess::ReadWrite, DataType::U32).with_count(count),
        ],
        [256, 1, 1],
        vec![Node::Region {
            generator: Ident::from(op_id),
            source_region: None,
            body: Arc::new(body),
        }],
    )
}

#[cfg(test)]
mod tests {
    fn iht_scalar(value: u32, threshold: u32) -> u32 {
        if (value & 0x7FFF_FFFF) >= threshold {
            value
        } else {
            0
        }
    }

    fn mp_clip_scalar(value: u32, edge: u32) -> u32 {
        value.min(edge)
    }

    #[test]
    fn generated_vector_scalar_threshold_contracts_match_scalar_reference() {
        let mut state = 0xC711_9A5E_u32;
        for case in 0..4096u32 {
            state = state.wrapping_mul(1_664_525).wrapping_add(1_013_904_223);
            let value = match case % 13 {
                0 => 0,
                1 => u32::MAX,
                2 => 0x8000_0000,
                3 => 0x7FFF_FFFF,
                _ => state,
            };
            state = state.rotate_left(9) ^ case.wrapping_mul(0x9E37_79B9);
            let threshold = match case % 17 {
                0 => 0,
                1 => 1,
                2 => u32::MAX,
                3 => 0x7FFF_FFFF,
                _ => state,
            };

            let abs_value = value & 0x7FFF_FFFF;
            let expected_iht = if abs_value >= threshold { value } else { 0 };
            assert_eq!(
                iht_scalar(value, threshold),
                expected_iht,
                "IHT scalar threshold case {case}"
            );
            assert_eq!(
                mp_clip_scalar(value, threshold),
                if value < threshold { value } else { threshold },
                "MP edge clip scalar case {case}"
            );
        }
    }
}