| Commit message (Collapse) | Author | Age | Files | Lines |
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This uses a new data structure for net.users that allows gaps, so
removing a port from a net is no longer an O(n) operation on the number
of users the net has.
Signed-off-by: gatecat <gatecat@ds0.me>
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The new primitive appears as an amalgamation of two existing OBUF
primitives. Compatible with older versions of apicula, although, of
course, using TLVDS_OBUF with old databases will not bring the desired
result, but no crash.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Some models have I/O cells that are IOBUFs, and other types (IBUFs and
OBUFs) are obtained by feeding 1 or 0 to the OEN input. This is done
with general-purpose routing so it's best to do it here to avoid
conflicts.
For this purpose, in the new bases, these special cells are of type IOBS
(IOB Simplified).
The proposed changes are compatible with bases of previous versions of
Apycula and do not require changing .CST constraint files.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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- Both the mode used by yosys and all Gowin primitive modes are supported.
- The ALU always starts with a zero slice.
- The maximum length of the ALU chain is limited to one line of the chip.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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* A hardwired MUX within each logical cell is used.
* The delay is equal 0.
* No user placement constraints.
* The output route contains dummy PIPs. They are ignored by gowin_pack, but it may be worth removing them.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Added support for the INS_LOC instruction in the constraints file
(.CST), which is used to specify object placement.
Expanded treatment of IO_LOC/IO_PORT constraints, which now can
be applied to both ports and IO buffers.
Port constraints have priority.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Add support for IOBUF and TBUF I/O modes.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Signed-off-by: gatecat <gatecat@ds0.me>
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Signed-off-by: David Shah <dave@ds0.me>
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* load wires
* add slice bels
* add IOB
* add aliases
* local aliases
* broken packing stuff
* working packer
* add constraints
* pnr runs1111
* add timing info
* constraints
* more constraint stuff
* add copyright
* remove generic reference
* remove parameters
* remove generic python api
* add newline to end of file
* some small refactoring
* warn on invalid constraints
* don't error on missing cell
* comment out debugging print
* typo
* avoid copy
* faster empty idstring
* remove intermediate variable
* no more deadnames
* fix cst warnings
* increase ripup and epsilon a bit
* take single device parameter
* add info to readme
* gui stubs
* Revert 4d03b681a8634e978bd5af73c97665500047e055
* assign ff_used in assignArchInfo
* decrease beta for better routability
* try to fix CI
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