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* Anlogic: let LUT5/6 have more cost than LUT4-Icenowy Zheng2018-12-191-1/+1
| | | | | | | | | | | | | | According to the datasheet of Anlogic Eagle FPGAs, The LUTs natively in an Anlogic FPGA is LUT4 (in MSLICEs) and "Enhanced LUT5" (in LSLICEs). An "Enhanced LUT5" can be divided into two LUT4s. So a LUT5 will cost around 2x resource of a LUT4, and a LUT6 will cost 2x resource of a LUT5. Change the -lut parameter passed to the abc command to pass this cost info to the ABC process. Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
* anlogic: add support for Eagle Distributed RAMIcenowy Zheng2018-12-171-0/+6
| | | | | | | | | | | | | The MSLICEs on the Eagle series of FPGA can be configured as Distributed RAM. Enable to synthesis to DRAM. As the Anlogic software suite doesn't support any 'bx to exist in the initializtion data of DRAM, do not enable the initialization support of the inferred DRAM. Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
* Initial support for Anlogic FPGAMiodrag Milanovic2018-12-011-0/+205