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path: root/src/main/scala/chisel3/util/Math.scala
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2022-01-10Apply scalafmtJack Koenig
Command: sbt scalafmtAll
2020-10-01Move Chisel3 to SPDX license conventions (#1604)Chick Markley
Change source and other relevant files to use SPDX license LICENSE file moved from src/ to ./ Changed license file to refer to this per recommendation using_spdx_license_list_short_identifiers WARNING: Tests fail with as of yet undiagnosed error ``` [error] Failed: Total 691, Failed 19, Errors 0, Passed 672, Ignored 15 [error] Failed tests: [error] chiselTests.QueueSpec [error] examples.VendingMachineGeneratorSpec [error] chiselTests.HarnessSpec [error] chiselTests.ConnectSpec [error] chiselTests.aop.SelectSpec [error] chiselTests.PopCountSpec [error] chiselTests.CloneModuleSpec [error] (Test / test) sbt.TestsFailedException: Tests unsuccessful [error] Total time: 379 s (06:19), completed Sep 30, 2020 12:38:17 AM sbt:chisel3> ```
2019-07-18Add width utility functions to avoid incorrect usage of bare log2Ceil(). (#819)Jim Lawson
* Add width utility functions to avoid incorrect usage of bare log2Ceil(). * Respond to comments: Remove apply(Data) method. Change name(s) to signedBitLength, unsignedBitLength. * Respond to comments - don't be lazy. Independently calculate the bit length to verify correct operation. * Respond to comments - return in.bitLength - 0 (not 1) for 0 * Respond to comments - update wdith for signed 0; add explicit tests. * Add comment expressing zero width wire assumption.
2019-03-11ScalaDocs improvement for utils Math, MixedVec (#1019)Richard Lin
2018-07-06Undeprecate log2Up and log2Down (#846)Jack Koenig
They should not be deprecated until zero-width wires actually work
2018-01-23Runtime API deprecation warnings (#761)Richard Lin
Add runtime warnings for use of deprecated Chisel methods. This is done using a macro that takes the message from a `@deprecated` annotation, and adds a call to `Builder.deprecated`. Reasoning is that by default, Scala doesn't print all deprecations, and that it's somewhat tricky to notice them - yet some support questions revolve around the use of deprecated and terribad API. This now prints warnings for uses of deprecated functions at runtime, and aggregates them by error and line to avoid spam. Also included is convenient information on enabling scalac deprecations. This also changes how line numbers for Chisel's error facility is determined, using prefix string comparison of the stack trace element classnames, instead of checking if the class is a subtype of UserModule. The previous one (specifically, calls to Class.forName) seems to interact badly with reflection-based cloneType when called at scale. This should also give more accurate reporting of errors that are in user code but outside of a UserModule. It turns out that `@deprecated` on macro functions don't do anything, so this changes the tags to the functions that the macros point to, which seems to work properly. It also turns out that there's a bunch of uses of deprecated functions in chiselTests which needs to be fixed. Not all `@deprecated` functions are also annotated with `@chiselRuntimeDeprecation`, because they're still used in Chisel internals, and we can't track whether they're called by the user or by Chisel and it will give a misleading error. These are a small amount of functions.
2017-03-08Move log2Up and log2Down to compatibility wrapperAndrew Waterman
2016-06-20Rename "package", "import", and explicit references to "chisel3".Jim Lawson
2016-06-20Rename chisel3 package.Jim Lawson