1#version 450
 2
 3#include "dequant_head.glsl"
 4
 5layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
 6
 7layout (binding = 0) readonly buffer A {A_TYPE data_a[];};
 8layout (binding = 1) writeonly buffer D {D_TYPE data_b[];};
 9
10void main() {
11    [[unroll]] for (uint wgy = 0; wgy < 256; wgy++) {
12        const uint i = gl_WorkGroupID.x * 256 + wgy;
13        if (i >= p.nel / QUANT_K) {
14            return;
15        }
16
17        const uint tid = gl_LocalInvocationID.x;
18        const uint ip = tid / 32;
19        const uint il = tid - 32 * ip;
20        const uint is = 8 * ip + il / 16;
21
22        const uint y_idx = i * QUANT_K + 128 * ip + il;
23
24        const uint ql_idx = 32 * ip + il;
25        const uint8_t qs = data_a[i].qs[32 * ip + il];
26
27        FLOAT_TYPE dall = FLOAT_TYPE(data_a[i].dm.x);
28        FLOAT_TYPE dmin = FLOAT_TYPE(data_a[i].dm.y);
29        data_b[y_idx +  0] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+0] & 0xF) * ((qs >> 0) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+0] >> 4));
30        data_b[y_idx + 32] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+2] & 0xF) * ((qs >> 2) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+2] >> 4));
31        data_b[y_idx + 64] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+4] & 0xF) * ((qs >> 4) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+4] >> 4));
32        data_b[y_idx + 96] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+6] & 0xF) * ((qs >> 6) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+6] >> 4));
33    }
34}