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10 Commits

Author SHA1 Message Date
Eddie Hung 36a88be609 ice40_wrapcarry -unwrap to preserve 'src' attribute 2019-12-09 14:28:54 -08:00
Eddie Hung bbdf2452b3 -unwrap to create $lut not SB_LUT4 for opt_lut 2019-12-09 13:27:09 -08:00
Eddie Hung 500ed9b501 Sensitive to direct inst of $__ICE40_CARRY_WRAPPER; recreate SB_LUT4 2019-12-09 12:45:22 -08:00
Eddie Hung e05372778a ice40_wrapcarry to really preserve attributes via -unwrap option 2019-12-09 11:48:28 -08:00
Eddie Hung 946d5854c0 Drop keep=0 attributes on SB_CARRY 2019-12-06 17:27:47 -08:00
Eddie Hung a7e0cca480 Merge SB_CARRY+SB_LUT4's attributes when creating $__ICE40_CARRY_WRAPPER 2019-12-05 07:01:18 -08:00
Eddie Hung 5897b918b3 ice40_wrapcarry to preserve SB_CARRY's attributes 2019-12-03 14:48:11 -08:00
Eddie Hung 12c692f6ed Revert "Merge pull request #1280 from YosysHQ/revert-1266-eddie/ice40_full_adder" 
This reverts commit c851dc1310, reversing
changes made to f54bf1631f.
 2019-08-12 12:06:45 -07:00
David Shah f9020ce2b3
Revert "Wrap SB_LUT+SB_CARRY into $__ICE40_CARRY_WRAPPER" 2019-08-10 17:14:48 +01:00
Eddie Hung 675c1d4218 Add ice40_wrapcarry pass, rename $__ICE40_FULL_ADDER -> CARRY_WRAPPER 2019-08-07 16:29:38 -07:00