Thursday, 2020-05-28

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-_whitenotifier-c- [fpga-tool-perf] srtemp opened issue #133: Build Problems and OS X Support - https://git.io/JfoEl15:45
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mithro@kgugala_: Any idea why the sdf file changes at https://github.com/SymbiFlow/prjxray-db/compare/master...mithro:master#diff-2a8202e62b71dfabf852dbb3d26a80d5 ?17:41
tpbTitle: Comparing SymbiFlow:master...mithro:master · SymbiFlow/prjxray-db · GitHub (at github.com)17:41
andrewb1999Does anyone know the status of xilinx DSPs in symbiflow-arch-defs and prjxray?18:00
ZirconiumXPretty sure DSP48E1 is supported?18:00
andrewb1999ZirconiumX: Do I have to do something special to enable them?  I don't see them being generated in the architecture files for the a50t18:01
andrewb1999I see stuff for DSP bits in prjxray, just wondering why I can't seem to get them generated in symbiflow-arch-defs and if there is something significant holding back dsp integration18:05
sf-slack<acomodi> andrewb1999: there is a basic support in prjxray, what is needed to do still is to start adding the support in arch-defs (this means creating the primitive and the corresponding pb_types)18:07
andrewb1999acomodi: Ok, we did some work on that last summer before prjxray had any dsp bits.  Will look into reintegrating that work and upstreaming.  Do you think there is enough support in prjxray to configure an m18x25 multiplier in the DSP blocks?18:11
sf-slack<acomodi> andrewb1999: I am not sure actually, as far as I know, basic multipliers should be configurable18:16
dkozelandrewb1999: I believe that DSP48E1 is not supported, I was looking at starting work on them19:11
dkozelIf there's existing work I'd like to help build on it and complete it19:12
daveshahenough DSP48E1 is in xray to do a basic convinational multiplier19:23
daveshahI briefly tested in nextpnr and it seemed to work but haven't gone beyond that19:24
daveshahThe basic registers should also work but I've never tested them. Cascading is not supported.19:24
dkozeladding cascading is a question of adding more minitests to prjxray? I couldn't find any references to DSP48s in the codebase19:27
daveshahThis is the DSP fuzzer https://github.com/SymbiFlow/prjxray/tree/master/fuzzers/100-dsp-mskpat19:31
tpbTitle: prjxray/fuzzers/100-dsp-mskpat at master · SymbiFlow/prjxray · GitHub (at github.com)19:31
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mithroThere is some documentation at https://docs.google.com/document/d/15MBYkL7FOoK4U5pxx7L1DLZZ_V70OdugjUZCgz5lx5I/edit21:02
tpbTitle: Project X-Ray - DSP Fuzzer - Google Docs (at docs.google.com)21:02
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sf-slack<timo.callahan> I'm encountering this error during placement in a new test I added for 100t, based on mkurk's scalable proc design, meant to fill up the fabrid. `[100%] Built target file_xc_xc7_tests_scalable_proc_scalable_proc_arty100t_artix7_100t-xc7a100t-virt-xc7a100t-test_top.net` `[100%] Generating scalable_proc_arty100t/artix7_100t-xc7a100t-virt-xc7a100t-test/top_io.place Traceback (most recent call last):   File21:27
sf-slack"/home/tcal/2nd-tcal-x/symbiflow-arch-defs/xc/common/utils/prjxray_create_ioplace.py", line 159, in <module>     main()   File "/home/tcal/2nd-tcal-x/symbiflow-arch-defs/xc/common/utils/prjxray_create_ioplace.py", line 73, in main     io_place.load_block_names_from_net_file(args.net)   File "/home/tcal/2nd-tcal-x/symbiflow-arch-defs/utils/vpr_io_place.py", line 60, in load_block_names_from_net_file21:27
sf-slack"//block[@instance='inpad[0]'] | //block[@instance='outpad[0]']"   File "src/lxml/etree.pyx", line 1582, in lxml.etree._Element.xpath   File "src/lxml/xpath.pxi", line 305, in lxml.etree.XPathElementEvaluator.__call__   File "src/lxml/xpath.pxi", line 225, in lxml.etree._XPathEvaluatorBase._handle_result lxml.etree.XPathEvalError: Error in xpath expression21:27
sf-slackxc/xc7/tests/scalable_proc/CMakeFiles/file_xc_xc7_tests_scalable_proc_scalable_proc_arty100t_artix7_100t-xc7a100t-virt-xc7a100t-test_top_io.place.dir/build.make:70: recipe for target 'xc/xc7/tests/scalable_proc/scalable_proc_arty100t/artix7_100t-xc7a100t-virt-xc7a100t-test/top_io.place' failed`  Any idea what might have triggered this?21:27
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