yosys/techlibs/ice40/abc_hx.box

# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_hx8k.txt

# NB: Inputs/Outputs must be ordered alphabetically
#     (with exceptions for carry in/out)

# Inputs: I0 I1 CI
# Outputs: CO
#   (NB: carry chain input/output must be last
#        input/output and have been moved there
#        overriding the alphabetical ordering)
SB_CARRY 1 1 3 1
259 231 126

# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 1 4 1
449 400 379 316
Add "-device" argument to synth_ice40 2019-04-17 17:04:46 -05:00			`# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_hx8k.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`
Fix and cleanup ice40 boxes for carry in/out 2019-06-22 16:27:41 -05:00			`# (with exceptions for carry in/out)`
Add ice40 box files 2019-04-16 18:39:30 -05:00
Fix and cleanup ice40 boxes for carry in/out 2019-06-22 16:27:41 -05:00			`# Inputs: I0 I1 CI`
Revert "Try using an ICE40_CARRY_LUT primitive to avoid ABC issues" This reverts commit a7632ab3326c5247b8152a53808413b259c13253. 2019-04-17 13:10:20 -05:00			`# Outputs: CO`
Fix and cleanup ice40 boxes for carry in/out 2019-06-22 16:27:41 -05:00			`# (NB: carry chain input/output must be last`
			`# input/output and have been moved there`
			`# overriding the alphabetical ordering)`
			`SB_CARRY 1 1 3 1`
			`259 231 126`
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`
Fix and cleanup ice40 boxes for carry in/out 2019-06-22 16:27:41 -05:00			`SB_LUT4 2 1 4 1`
Add "-device" argument to synth_ice40 2019-04-17 17:04:46 -05:00			`449 400 379 316`