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: A B CI
# Outputs: O CO
#   (NB: carry chain input/output must be last
#        input/output and have been moved there
#        overriding the alphabetical ordering)
$__ICE40_FULL_ADDER 1 1 3 2
400 379 316
259 231 126
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
Combine SB_CARRY+SB_LUT into one $__ICE40_CARRY_LUT4 box 2019-07-12 02:50:42 -05:00			`# Inputs: A B CI`
			`# Outputs: O 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)`
$__ICE40_CARRY_LUT4 -> $__ICE40_FULL_ADDER as per @whitequark 2019-07-15 14:03:51 -05:00			`$__ICE40_FULL_ADDER 1 1 3 2`
Combine SB_CARRY+SB_LUT into one $__ICE40_CARRY_LUT4 box 2019-07-12 02:50:42 -05:00			`400 379 316`
Fix and cleanup ice40 boxes for carry in/out 2019-06-22 16:27:41 -05:00			`259 231 126`