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Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
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Changes the internal state of PRNG to use Vec[Bool] instead of UInt.
This fixes an @aswaterman identified future problem with asynchronous
reset.
A register with an asynchronous reset can only be reset to a literal.
Previously, an LFSR would store state as a UInt. If it was not
parameterized with a seed it should have its least significant bit
reset to something to avoid locking up. It's ideal to not reset the
full UInt (better test coverage, decreased reset fanout). However,
it's difficult to only reset one bit of a UInt. Conversely, it's
trivial to reset one bit of a Vec[Bool]. This also moves PRNG/LFSR
closer to a canonical representation of their internal state, i.e.,
it's natural to think of generalizing Vec[Bool] to arbitrary finite
fields (Vec[A <: Field]) whereas UInt is tightly coupled to GF2.
Minor updates:
- Updates/fixes to some scaladoc
- Add assertion to period test to make sure LFSR is changing
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
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Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
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Make LFSR testing generic to enable it to test other LFSRs.
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
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* Update documentation for LSFR16
- Moved bulk of comments to object.
- Added an example
- Added functional test
- example based on section of test
* Update documentation for LSFR16
- Moved bulk of comments to object.
- Added an example
- Added functional test
- example based on section of test
* Update documentation for LSFR16
- Fixed typos in LFSR
- Reduce trials a little
- Add test of LFSR period
* Update documentation for LSFR16
- Fixed remaining LSFR, arrgh
- Removed intellij specific warning suppressor
- Fixed comments/scaladoc wording and case.
* Update documentation for LSFR16
- Use printable interpolator as example of printing out a Vec
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Massage CompileOption names in an attempt to preserve default (Strict) CompileOptions in the absence of explicit imports.
NOTE: Since the default is now strict, we may encounter errors when we generate connections for clients (i.e., in Vec.do_apply() when we wire up a sequence).
We should really thread the CompileOptions through the macro system so the client's implicits are used.
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