llama.cpp/ggml/src/vulkan-shaders/rope_neox.comp

#version 450

#include "rope_head.comp"

void main() {
    const uint col = gl_GlobalInvocationID.y * 2;
    const uint row = gl_GlobalInvocationID.x;

    if (col >= p.ncols) {
        return;
    }

    if (col >= p.n_dims) {
        const uint i = row*p.ncols + col;

        data_d[i + 0] = data_a[i + 0];
        data_d[i + 1] = data_a[i + 1];

        return;
    }

    const uint i  = row*p.ncols + col/2;
    const uint i2 = row/p.p_delta_rows;

    const float theta_base = data_pos[i2] * pow(p.theta_scale, col/2.0f);

    const float freq_factor = p.has_ff != 0 ? data_ff[col/2] : 1.0f;

    float cos_theta, sin_theta;
    rope_yarn(theta_base / freq_factor, col, cos_theta, sin_theta);

    const float x0 = float(data_a[i + 0]);
    const float x1 = float(data_a[i + p.n_dims/2]);

    data_d[i + 0]        = D_TYPE(x0*cos_theta - x1*sin_theta);
    data_d[i + p.n_dims/2] = D_TYPE(x0*sin_theta + x1*cos_theta);
}