87 lines
3.5 KiB
Python
87 lines
3.5 KiB
Python
# Grid size including IOBs at edges
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X = 12
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Y = 12
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# SLICEs per tile
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Z = 8
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# LUT input count
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K = 4
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# Number of local wires
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L = Z*(K+1) + 8
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# "Sparsity" of bel input wire pips
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Si = 4
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# "Sparsity" of Q to local wire pips
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Sq = 4
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# "Sparsity" of local to neighbour local wire pips
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Sl = 8
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def is_io(x, y):
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return x == 0 or x == X-1 or y == 0 or y == Y-1
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for x in range(X):
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for y in range(Y):
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# Bel port wires
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for z in range(Z):
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ctx.addWire(name="X%dY%dZ%d_CLK" % (x, y, z), type="BEL_CLK", x=x, y=y)
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ctx.addWire(name="X%dY%dZ%d_Q" % (x, y, z), type="BEL_Q", x=x, y=y)
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for i in range(K):
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ctx.addWire(name="X%dY%dZ%d_I%d" % (x, y, z, i), type="BEL_I", x=x, y=y)
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# Local wires
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for l in range(L):
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ctx.addWire(name="X%dY%d_LOCAL%d" % (x, y, l), type="LOCAL", x=x, y=y)
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# Create bels
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if is_io(x, y):
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if x == y:
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continue
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for z in range(2):
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ctx.addBel(name="X%dY%d_IO%d" % (x, y, z), type="GENERIC_IOB", loc=Loc(x, y, z), gb=False)
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ctx.addBelInput(bel="X%dY%d_IO%d" % (x, y, z), name="I", wire="X%dY%dZ%d_I0" % (x, y, z))
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ctx.addBelInput(bel="X%dY%d_IO%d" % (x, y, z), name="EN", wire="X%dY%dZ%d_I1" % (x, y, z))
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ctx.addBelOutput(bel="X%dY%d_IO%d" % (x, y, z), name="O", wire="X%dY%dZ%d_Q" % (x, y, z))
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else:
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for z in range(Z):
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ctx.addBel(name="X%dY%d_SLICE%d" % (x, y, z), type="GENERIC_SLICE", loc=Loc(x, y, z), gb=False)
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ctx.addBelInput(bel="X%dY%d_SLICE%d" % (x, y, z), name="CLK", wire="X%dY%dZ%d_CLK" % (x, y, z))
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for k in range(K):
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ctx.addBelInput(bel="X%dY%d_SLICE%d" % (x, y, z), name="I[%d]" % k, wire="X%dY%dZ%d_I%d" % (x, y, z, k))
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ctx.addBelOutput(bel="X%dY%d_SLICE%d" % (x, y, z), name="Q", wire="X%dY%dZ%d_Q" % (x, y, z))
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for x in range(X):
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for y in range(Y):
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# Pips driving bel input wires
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# Bel input wires are driven by every Si'th local with an offset
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def create_input_pips(dst, offset, skip):
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for i in range(offset % skip, L, skip):
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src = "X%dY%d_LOCAL%d" % (x, y, i)
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ctx.addPip(name="X%dY%d.%s.%s" % (x, y, src, dst), type="BEL_INPUT",
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srcWire=src, dstWire=dst, delay=ctx.getDelayFromNS(0.05), loc=Loc(x, y, 0))
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for z in range(Z):
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create_input_pips("X%dY%dZ%d_CLK" % (x, y, z), 0, Si)
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for k in range(K):
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create_input_pips("X%dY%dZ%d_I%d" % (x, y, z, k), k % Si, Si)
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# Pips from bel outputs to locals
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def create_output_pips(dst, offset, skip):
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for i in range(offset % skip, Z, skip):
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src = "X%dY%dZ%d_Q" % (x, y, i)
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ctx.addPip(name="X%dY%d.%s.%s" % (x, y, src, dst), type="BEL_OUTPUT",
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srcWire=src, dstWire=dst, delay=ctx.getDelayFromNS(0.05), loc=Loc(x, y, 0))
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# Pips from neighbour locals to locals
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def create_neighbour_pips(dst, nx, ny, offset, skip):
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if nx < 0 or nx >= X or ny < 0 or ny >= Y:
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return
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for i in range(offset % skip, L, skip):
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src = "X%dY%d_LOCAL%d" % (nx, ny, i)
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ctx.addPip(name="X%dY%d.%s.%s" % (x, y, src, dst), type="NEIGHBOUR",
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srcWire=src, dstWire=dst, delay=ctx.getDelayFromNS(0.05), loc=Loc(x, y, 0))
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for l in range(L):
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dst = "X%dY%d_LOCAL%d" % (x, y, l)
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create_output_pips(dst, l % Sq, Sq)
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create_neighbour_pips(dst, x-1, y-1, (l + 1) % Sl, Sl)
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create_neighbour_pips(dst, x-1, y, (l + 2) % Sl, Sl)
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create_neighbour_pips(dst, x-1, y+1, (l + 2) % Sl, Sl)
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create_neighbour_pips(dst, x, y-1, (l + 3) % Sl, Sl)
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create_neighbour_pips(dst, x, y+1, (l + 4) % Sl, Sl)
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create_neighbour_pips(dst, x+1, y-1, (l + 5) % Sl, Sl)
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create_neighbour_pips(dst, x+1, y, (l + 6) % Sl, Sl)
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create_neighbour_pips(dst, x+1, y+1, (l + 7) % Sl, Sl) |