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20 Commits

Author SHA1 Message Date
Marcelina Kościelnicka 8501342fc5 synth_xilinx: Use opt_dff. 
The main part is converting xilinx_dsp to recognize the new FF types
created in opt_dff instead of trying to recognize the patterns on its
own.

The fsm call has been moved upwards because the passes cannot deal with
$dffe/$sdff*, and other optimizations don't help it much anyway.
 2020-07-30 22:26:09 +02:00
Eddie Hung 592baebd22 xilinx: xilinx_dsp_cascade to check CREG for DSP48E1 only 2020-04-22 17:43:25 -07:00
Eddie Hung 7f33a0294b Cleanup use of hard-coded default parameters in light of #1945 2020-04-22 12:02:30 -07:00
Marcin Kościelnicki e226a8f7f1 Minor nit fixes 2019-12-25 15:39:40 +01:00
Eddie Hung 1d0ac659ad Fix OPMODE for PCIN->PCOUT cascades in xc6s, check B[01]REG too 2019-12-23 14:40:59 -08:00
Eddie Hung 75acaff6f5 Fix CEA/CEB check 2019-12-23 14:22:13 -08:00
Eddie Hung edabe73377 Fix checking CE[AB] and for direct connections 2019-12-23 13:41:26 -08:00
Eddie Hung 71cac30309 Support unregistered cascades for A and B inputs 2019-12-23 12:38:18 -08:00
Eddie Hung d00533eaa8 Add DSP48A* PCOUT -> PCIN cascade support 2019-12-23 11:42:46 -08:00
Eddie Hung 991c2ca95b Add comment on why we have to match for clock-enable/reset muxes 2019-10-05 08:56:37 -07:00
Eddie Hung 792cd31052 Add comments for xilinx_dsp_cascade 2019-10-04 22:31:04 -07:00
Eddie Hung aebbfffd71 Ooops AREG and BREG to default to -1 2019-09-27 11:57:53 -07:00
Eddie Hung 5b9deef10d Do not always zero out C (e.g. during cascade breaks) 2019-09-26 13:59:05 -07:00
Eddie Hung 58f31096ab Zero out ports 2019-09-26 13:40:38 -07:00
Eddie Hung af59856ba1 xilinx_dsp_cascade to also cascade AREG and BREG 2019-09-26 13:29:18 -07:00
Eddie Hung 832216dab0 Try recursive pmgen for P cascade 2019-09-26 12:09:57 -07:00
Eddie Hung d0dbbc2605 Move unextend initialisation later 2019-09-23 13:26:34 -07:00
Eddie Hung 95644b00cb OPMODE is port not param 2019-09-20 12:37:29 -07:00
Eddie Hung 0bca366bcd WIP for xiinx_dsp_cascadeAB 2019-09-20 12:07:14 -07:00
Eddie Hung ed187ef1cf Add a xilinx_dsp_cascade matcher for PCIN -> PCOUT 2019-09-20 10:00:09 -07:00