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Combine SB_CARRY+SB_LUT into one $__ICE40_CARRY_LUT4 box

This commit is contained in:
Eddie Hung 2019-07-12 00:50:42 -07:00
parent 19c1c3cfa3
commit fc3d74616f
3 changed files with 13 additions and 25 deletions
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12
techlibs/ice40/abc_hx.box
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@ -3,15 +3,11 @@
# NB: Inputs/Outputs must be ordered alphabetically
# (with exceptions for carry in/out)
# Inputs: I0 I1 CI
# Outputs: CO
# 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)
SB_CARRY 1 1 3 1
$__ICE40_CARRY_LUT4 1 1 3 2
400 379 316
259 231 126
# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 1 4 1
449 400 379 316

12
techlibs/ice40/abc_lp.box
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@ -3,15 +3,11 @@
# NB: Inputs/Outputs must be ordered alphabetically
# (with exceptions for carry in/out)
# Inputs: CI I0 I1
# Outputs: CO
# 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)
SB_CARRY 1 1 3 1
$__ICE40_CARRY_LUT4 1 1 3 2
589 558 465
675 609 186
# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 1 4 1
661 589 558 465

14
techlibs/ice40/abc_u.box
View File

@ -3,15 +3,11 @@
# NB: Inputs/Outputs must be ordered alphabetically
# (with exceptions for carry in/out)
# Inputs: I0 I1 CI
# Outputs: CO
# 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)
SB_CARRY 1 1 3 1
675 609 278
# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 1 4 1
1285 1231 1205 874
$__ICE40_CARRY_LUT4 1 1 3 2
1231 1205 875
675 609 278