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Reduce to three devices: hx, lp, u

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This commit is contained in:
Eddie Hung 2019-04-17 15:19:02 -07:00
parent abcd3103ff
commit c795e14d25
7 changed files with 23 additions and 4 deletions
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13
techlibs/ice40/u.box Normal file
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@ -0,0 +1,13 @@
# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_up5k.txt
# NB: Inputs/Outputs must be ordered alphabetically
# Inputs: CI I0 I1
# Outputs: CO
SB_CARRY 1 1 3 1
278 675 609
# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 1 4 1
1285 1231 1205 874