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https://github.com/YosysHQ/yosys
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86 lines
3.5 KiB
Verilog
86 lines
3.5 KiB
Verilog
(* abc9_box, lib_whitebox *)
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module \$__ICE40_CARRY_WRAPPER (
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(* abc9_carry *)
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output CO,
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output O,
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input A, B,
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(* abc9_carry *)
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input CI,
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input I0, I3
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);
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parameter LUT = 0;
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parameter I3_IS_CI = 0;
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wire I3_OR_CI = I3_IS_CI ? CI : I3;
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SB_CARRY carry (
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.I0(A),
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.I1(B),
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.CI(CI),
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.CO(CO)
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);
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SB_LUT4 #(
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.LUT_INIT(LUT)
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) adder (
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.I0(I0),
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.I1(A),
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.I2(B),
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.I3(I3_OR_CI),
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.O(O)
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);
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`ifdef ICE40_HX
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specify
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L79
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(CI => CO) = (126, 105);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L80
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(I0 => O) = (449, 386);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L82
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(A => CO) = (259, 245);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L83
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(A => O) = (400, 379);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L85
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(B => CO) = (231, 133);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L86
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(B => O) = (379, 351);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_hx1k.txt#L88
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(I3 => O) = (316, 288);
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(CI => O) = (316, 288);
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endspecify
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`endif
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`ifdef ICE40_LP
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specify
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L79
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(CI => CO) = (186, 155);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L80
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(I0 => O) = (662, 569);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L82
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(A => CO) = (382, 362);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L83
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(A => O) = (589, 558);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L85
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(B => CO) = (341, 196);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L86
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(B => O) = (558, 517);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_lp1k.txt#L88
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(I3 => O) = (465, 423);
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(CI => O) = (465, 423);
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endspecify
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`endif
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`ifdef ICE40_U
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specify
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L91
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(CI => CO) = (278, 278);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L92
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(I0 => O) = (1245, 1285);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L94
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(A => CO) = (675, 662);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L95
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(A => O) = (1179, 1232);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L97
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(B => CO) = (609, 358);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L98
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(B => O) = (1179, 1205);
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// https://github.com/YosysHQ/icestorm/blob/be0bca0230d6fe1102e0a360b953fbb0d273a39f/icefuzz/timings_up5k.txt#L100
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(I3 => O) = (861, 874);
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(CI => O) = (861, 874);
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endspecify
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`endif
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endmodule
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