51 lines
1.3 KiB
Text
51 lines
1.3 KiB
Text
#version 450
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#include "generic_head.comp"
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#include "types.comp"
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#extension GL_EXT_control_flow_attributes : enable
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layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
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layout (binding = 0) readonly buffer A {A_TYPE data_a[];};
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layout (binding = 1) writeonly buffer D {D_TYPE data_d[];};
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layout (constant_id = 0) const uint BLOCK_SIZE = 32;
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shared FLOAT_TYPE tmpmax[BLOCK_SIZE];
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shared uint tmp[BLOCK_SIZE];
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void main() {
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const uint row = gl_WorkGroupID.z * 262144 + gl_WorkGroupID.y * 512 + gl_WorkGroupID.x;
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const uint col = gl_LocalInvocationID.x;
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if (col >= p.KX) {
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return;
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}
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A_TYPE amax = data_a[row*p.KX + col];
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tmp[col] = col;
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for (uint i = col + BLOCK_SIZE; i < p.KX; i += BLOCK_SIZE) {
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A_TYPE val = data_a[row*p.KX + i];
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if (val > amax) {
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amax = val;
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tmp[col] = i;
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}
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}
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tmpmax[col] = amax;
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barrier();
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[[unroll]] for (int s = int(BLOCK_SIZE) / 2; s > 0; s >>= 1) {
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if (col < s && col + s < p.KX) {
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if (tmpmax[col] < tmpmax[col + s]) {
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tmpmax[col] = tmpmax[col + s];
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tmp[col] = tmp[col + s];
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}
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}
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barrier();
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}
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if (col == 0) {
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data_d[row] = D_TYPE(tmp[0]);
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}
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}
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