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ecp5: Add list of supported primitives

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Signed-off-by: David Shah <davey1576@gmail.com>
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David Shah 2019-02-23 21:06:42 +00:00
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# nextpnr-ecp5 Primitive Support List
nextpnr-ecp5 currently supports the following primitives:
- **ALU54B** (limited support, must be manually placed)
- **CCU2C**
- **CLKDIVF**
- **DCUA**
- **DDRDLLA**
- **DELAYF**
- **DELAYG**
- **DP16KD**
- **DQSBUFM**
- **DTR**
- **ECLKSYNCB**
- **EHXPLLL**
- **EXTREFB**
- **GSR**
- **IDDR71B**
- **IDDRX1F**
- **IDDRX2DQA**
- **IDDRX2F**
- **IOLOGIC**
- **JTAGG** (untested)
- **L6MUX21**
- **LUT4**
- **MULT18X18D** (cascade functionality not supported)
- **ODDR71B**
- **ODDRX1F**
- **ODDRX2DQA**
- **ODDRX2DQSB**
- **ODDRX2F**
- **OSCG**
- **OSHX2A**
- **PCSCLKDIV**
- **PFUMX**
- **SEDGA** (untested)
- **SIOLOGIC**
- **TRELLIS_DPR16X4**
- **TRELLIS_ECLKBUF**
- **TRELLIS_FF**
- **TRELLIS_IO**
- **TRELLIS_SLICE**
- **TSHX2DQA**
- **TSHX2DQSA**
- **USRMCLK** (untested)