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

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#version 450
#include "types.glsl"
#include "sum_rows.glsl"
#extension GL_EXT_control_flow_attributes : enable
layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
layout (binding = 0) readonly buffer A {A_TYPE data_a[];};
layout (binding = 1) writeonly buffer D {D_TYPE data_d[];};
layout (constant_id = 0) const uint BLOCK_SIZE = 32;
shared FLOAT_TYPE tmp[BLOCK_SIZE];
void main() {
const uint row = gl_WorkGroupID.z * 262144 + gl_WorkGroupID.y * 512 + gl_WorkGroupID.x;
const uint col = gl_LocalInvocationID.x;
const float weight = p.weight;
const uint i03 = fastdiv(row, p.ne0_12mp, p.ne0_12L);
const uint i03_offset = i03 * p.ne01*p.ne02;
const uint i02 = fastdiv(row - i03_offset, p.ne0_1mp, p.ne0_1L);
const uint i01 = row - i03_offset - i02*p.ne01;
const uint src_idx = get_aoffset() + i01 * p.nb01 + i02 * p.nb02 + i03 * p.nb03;
const uint dst_idx = get_doffset() + i01 * p.nb11 + i02 * p.nb12 + i03 * p.nb13;
tmp[col] = FLOAT_TYPE(0.0);
for (uint i = col; i < p.n_cols; i += BLOCK_SIZE) {
tmp[col] += FLOAT_TYPE(data_a[src_idx + i]);
}
barrier();
[[unroll]] for (int s = int(BLOCK_SIZE) / 2; s > 0; s >>= 1) {
if (col < s) {
tmp[col] += tmp[col + s];
}
barrier();
}
if (col == 0) {
data_d[dst_idx] = D_TYPE(tmp[0] * weight);
}
}