yosys/techlibs/ice40/abc_lp.box

# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_lp8k.txt

# NB: Inputs/Outputs must be ordered alphabetically

# Inputs: CI I0 I1
# Outputs: CO
SB_CARRY 1 1 3 1
186 675 609

# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 0 4 1
465 558 589 661
Reduce to three devices: hx, lp, u 2019-04-17 17:19:02 -05:00			`# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_lp8k.txt`
Add SB_LUT4 to box library 2019-04-16 19:34:11 -05:00
Add ice40 box files 2019-04-16 18:39:30 -05:00			`# NB: Inputs/Outputs must be ordered alphabetically`

Revert "Try using an ICE40_CARRY_LUT primitive to avoid ABC issues" This reverts commit a7632ab3326c5247b8152a53808413b259c13253. 2019-04-17 13:10:20 -05:00			`# Inputs: CI I0 I1`
			`# Outputs: CO`
			`SB_CARRY 1 1 3 1`
Reduce to three devices: hx, lp, u 2019-04-17 17:19:02 -05:00			`186 675 609`
Revert "Try using an ICE40_CARRY_LUT primitive to avoid ABC issues" This reverts commit a7632ab3326c5247b8152a53808413b259c13253. 2019-04-17 13:10:20 -05:00
			`# Inputs: I0 I1 I2 I3`
			`# Outputs: O`
Make SB_LUT4 a blackbox 2019-04-18 11:05:22 -05:00			`SB_LUT4 2 0 4 1`
Reduce to three devices: hx, lp, u 2019-04-17 17:19:02 -05:00			`465 558 589 661`