41 lines
1.6 KiB
Plaintext
41 lines
1.6 KiB
Plaintext
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#pragma once
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#include "common/common.h"
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namespace gr {
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__device__ __forceinline__ float myExp(float x) { return (1 << min(30, static_cast<int>(x))); }
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__device__ __forceinline__ int inCellViaUsage(int idx, int *vias, int N, int LAYER) {
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int layer = idx / N / N - 1, y = idx / N % N, x = idx % N;
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int ans = 0;
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if (layer + 2 < LAYER) ans += vias[idx]; // a via from botLayer to currlayer
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if (layer >= 0) ans += vias[layer * N * N + x * N + y]; // a via from currlayer to topLayer
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return ans;
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}
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__device__ __forceinline__ float twoCellsViaUsage(int idx, int *vias, int N, int LAYER) {
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return sqrt(0.5 * (inCellViaUsage(idx, vias, N, LAYER) + inCellViaUsage(idx + 1, vias, N, LAYER))) * 1.5;
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}
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__device__ __forceinline__ float inCellUsedArea(int idx, int *wires, float *fixed, int N) {
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float ans = 0;
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if (idx % N > 0) ans += fixed[idx - 1] + wires[idx - 1];
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if (idx % N + 1 < N) ans += fixed[idx] + wires[idx];
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return ans / 2;
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}
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__device__ __forceinline__ float inCellViaCost(
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int idx, int *wires, float *fixed, const float *capacity, float logisticSlope, int N) {
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return 1.0 / (1.0 + myExp(logisticSlope * (capacity[idx] - inCellUsedArea(idx, wires, fixed, N))));
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}
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__device__ __forceinline__ float cellResource(
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int idx, int *wires, float *fixed, int *vias, const float *capacity, int N, int LAYER) {
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float ans = wires[idx] + fixed[idx];
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if (idx % N) ans += wires[idx - 1] + fixed[idx - 1];
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ans /= 2;
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ans += sqrt(1.0 * inCellViaUsage(idx, vias, N, LAYER)) * 1.5;
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return capacity[idx] - ans;
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}
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} // namespace gr
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