Changelog for the clash-lib package

0.99.3 July 28th 2018

• Fixes bugs:
  • Evaluator recognizes Bit literals #329
  • Use existential type-variables in context of GADT pattern match
  • Do not create zero-bit temporary variables in generated HDL
  • Use correct arguments in nested primitives #323
  • Zero-constructor data type needs 0 bits #238
  • Create empty component when result needs 0 bits
  • Evaluator performs BigNat arithmetic

0.99.1 May 12th 2018

• Allow ~NAME[N] tag inside ~GENSYM[X]
• Support HDL record selector generation #313

0.99 March 31st 2018

• New features:
  • Support for clash-prelude-0.99:
    • Explicit clock and reset arguments
    • Overhaul of TopEntity annotations
  • Hierarchies with multiple synthesisable boundaries by allowing more than one function in scope to have a Synthesize annotation.
    • Local caching of functions with a Synthesize annotation
  • Bit type is mapped to a HDL scalar type (e.g. std_logic in VHDL)
  • Improved name preservation
  • Zero-bit values are filtered out of the generated HDL
  • Improved compile-time computation
• Many bug fixes

0.7.1 April 11th 2017

• New features:
  • Support distribution of primitive templates with Cabal/Hackage packages commit
  • Find memory data files and primitive files relative to import dirs (-i<DIR>)
• Fixes bugs:
  • case (EmptyCase ty) of ty' { ... } -> EmptyCase ty' #198
  • BitVector.split# apply the correct type arguments

0.7 January 16th 2017

• New features:
  • Support for clash-prelude 0.11
  • Primitive templates can include QSys files
  • VHDL blackboxes: support additional libraries and uses keywords in generated VHDL
  • Highly limited Float/Double support (literals and Rational conversion), hidden behind the -clash-float-support flag.
• Fixes bugs:
  • Reduce type families inside clock period calculation #180
  • Only output signed literals as hex when they're multiple of 4 bits #187
  • Correctly print negative hex literals

0.6.21 August 18th 2016

• Fixes bugs:
  • Type families are not currently being reduced correctly #167

0.6.20 August 3rd 2016

• Fixes bugs:
  • Bug in DEC transformation overwrites case-alternatives
  • Bug in DEC transformation creates non-representable let-binders

0.6.19 July 19th 2016

• Fixes bugs:
  • Rounding error in logBase calculation

0.6.18 July 15th 2016

• New features:
  • Better error location reporting
• Fixes bugs:
  • Values of type Index 'n', where 'n' > 2^MACHINE_WIDTH, incorrectly considered non-synthesisable due to overflow

0.6.17 June 9th 2016

• Fixes bugs:
  • Eq instance of Vec sometimes not synthesisable

0.6.16 June 7th 2016

• New features:
  • DEC transformation also lifts HO-primitives applied to "interesting" primitives (i.e. zipWith (*))
• Fixes bugs:
  • replicate unfolded incorrectly #150
  • imap is not unrolled #151

0.6.15 April 7th 2016

• New features:
  • Up to 2x reduced compilation times when working with large Vec literals
• Fixes bugs:
  • Bug in DEC transformation throws CLaSH into an endless loop #140

0.6.14 March 21st 2016

• New features:
  • Also generate testbench for circuits without input ports #135
• Fixes bugs:
  • clockWizard broken #49

0.6.13 March 14th 2016

• Fixes bugs:
  • Not all lambda's in a function position removed

0.6.12 March 14th 2016

• Fixes bugs:
  • Not all lambda's in a function position removed due to bad eta-expansion #132

0.6.11 March 11th 2016

• New features:
  • Add support for HDL synthesis tool specific HDL generation
  • Preserve more Haskell names in generated HDL #128

0.6.10 February 10th 2016

• New features:
  • hdl files can be written to a directory other than the current working directory #125
• Fixes bugs:
  • caseCon transformation does not work on non-exhaustive case-expressions #123
  • Primitive reductions don't look through Signal #126

0.6.9

• Fixes bugs:
  • case undefined of ... should reduce to undefined #116
  • Type families obscure eligibility for synthesis #114

0.6.8 January 13th 2015

• New features:
  • Support for Haskell's: Char, Int8, Int16, Int32, Int64, Word, Word8, Word16, Word32, Word64.
  • Int/Word/Integer bitwidth for generated HDL is configurable using the -clash-intwidth=N flag, where N can be either 32 or 64.
• Fixes bugs:
  • Cannot reduce case error ... of ... to error ... #109

0.6.7 December 21st 2015

• Support for unbound-generics-0.3
• New features:
  • Only look for 'topEntity' in the root module. #22

0.6.6 December 11th 2015

• New features:
  • Remove all existing HDL files before generating new ones. This can be disabled by the -clash-noclean flag. #96
  • Support for clash-prelude 0.10.4

0.6.5 November 17th 2015

• Fixes bugs:
  • Integer literals used as arguments not always properly annotated with their type.

0.6.4 November 12th 2015

• Fixes bugs:
  • Reversing alternatives is not meaning preserving for literal patterns #91
  • DEC: root of the case-tree must contain at least 2 alternatives #92

0.6.3 October 24th 2015

• New features:
  • Improve DEC transformation: consider alternatives before the subject when checking for disjoint expressions.
• Fixes bugs:
  • DEC: don't generate single-branch case-expressions #90

0.6.2 October 21st 2015

• Fixes bugs:
  • DEC: Subject and alternatives are not disjoint #88

0.6.1 October 16th 2015

• New features:

  • Support for clash-prelude 0.10.1

  • Transformation that lifts applications of the same function out of alternatives of case-statements. e.g.

    case x of
      A -> f 3 y
      B -> f x x
      C -> h x
    

    is transformed into:

    let f_arg0 = case x of {A -> 3; B -> x}
        f_arg1 = case x of {A -> y; B -> x}
        f_out  = f f_arg0 f_arg1
    in  case x of
          A -> f_out
          B -> f_out
          C -> h x
    

• Fixes bugs:

  • Case-statements acting like normal decoder circuits are erroneously synthesised to priority decoder circuits.

0.6 October 3rd 2015

• New features:
  • Support for clash-prelude 0.10
  • Add ~INDEXTYPE tag: primitives get access to the Index clash-prelude type
  • Add ~IF construct: primitives can do conditional templating
  • Unroll "definitions" of the following primitives: fold, dfold, foldr

0.5.13 September 21st 2015

• Fixes bugs:
  • Performance bug: top-level definitions of type "Signal" erroneously inlined.

0.5.12 September 14th 2015

• New features:

  • Completely unroll "definitions" of some higher-order primitives with non-representable argument or result vectors: It is now possible to translate e.g. f xs ys = zipWith ($) (map (+) xs) ys :: Vec 4 Int -> Vec 4 Int -> Vec 4 Int

• Fixes bugs:

  • topLet transformation erroneously not performed in a top-down traversal
  • Specialisation limit unchecked on types and constants
  • Vector of functions cannot be translated #25
  • CLaSH fails to generate VHDL when map is applied #78

0.5.11 September 7th 2015

• Fixes bugs:
  • Clash running out of memory on Simple-ish project #70
  • CLaSH.Sized.Vector.:> was not allowed as a function argument to HO-primitives

0.5.10 August 2nd 2015

• Fixes bugs:
  • Make testbench generation deterministic
  • Compile against unbound-generics-0.2

0.5.9 July 9th 2015

• Fixes bugs:
  • coreView didn't look through newtypes of the form: newtype Foo a = MkFoo (Maybe a)

0.5.8 June 26th 2015

• Fixes bugs:
  • Allow text and tags in ~SIGD black box construct

0.5.7 June 25th 2015

• New features:

  • Support for copying string literals from Haskell to generated code
  • Collect and copy data-files

• Fixes bugs:

  • Signals declared twice when not using a clock-generating component #60
  • This piece of code eat up all CPU when generating verilog #62

0.5.6 June 3rd 2015

• New features:
  • Support Verilog backend
  • Generated component names are prefixed by the name of the module containing the topEntity

0.5.5 May 18th 2015

• New features:

  • Make inlining and specialisation limit configurable
  • Make debug message level configurable

• Fixes bugs:

  • Netlist: ensure that the arguments of a component instantiation are always simple variables
  • CaseCon transformation: ensure that we run the compile-time evaluator on the subject before handling the one-alternative case
  • Emit a warning if a function remains recursive, instead of producing an error: compilation can still be successful if the function is an argument to a higher-order blackbox that doesn't use the function.
  • Emit a warning if inlining limit is reached, instead of producing an error: compilation can still be successful if the function is an argument to a higher-order blackbox that doesn't use the function.
  • Always inline terms that have a type of kind Constraint

0.5.4 May 10th 2015

• New features:
  • Add ~COMPNAME tag: primitives get access to the component name in which they are instantiated

0.5.3 May 5th 2015

• New features:
  • TopEntity wrappers are now specified as ANN annotation pragmas
• Fixes bugs:
  • Lost system1000 clock in VHDL generation... #53
  • flattenCallTree sometimes introduces free variables

0.5.2 May 1st 2015

• New features:
  • Generate wrappers around topEntity that have constant names and types

0.5.1 April 20th 2015

• GHC 7.10 support

0.5 March 11th 2015

• New features:

  • Simplify BlackBox handling, and improve VHDL generation. #47
  • Use unbound-generics. #48

• Fixes bugs:

  • VHDL generation error: wrapper for sum-of-products type. #44

0.4.1 February 4th 2015

• Fixes bugs:
  • Treat BlackBox expressions as declarations when DC args. #37
  • Don't inline recursive closed bindings

0.4 November 17th 2014

• New features:

  • Support for clash-prelude 0.6

• Fixes bugs:

  • Ambiguous type: 'std_logic_vector' or 'std_ulogic_vector' #33

0.3.2 June 5th 2014

• Fixes bugs:
  • VHDL array constant ambiguous #18
  • Exception: can't create selector #24
  • Calls to vhdlTypeMark don't result to inclusion of VHDL type in types.vhdl #28

0.3.1 May 15th 2014

• New features:

  • Make ANF lift non-representable values #7
  • Hardcode fromInteger for Signed and Unsigned #9
  • Replace VHDL default hole by error hole #13

• Fixes bugs:

  • Type families are not expanded #3
  • Exception: CLaSH.Netlist.VHDL(512): fromSLV: Vector 13 Bool #5
  • Incorrect vhdl generation for default value in blackbox #6
  • Duplicate type names when multiple ADTs need the same amount of bits #8
  • Circuit testbench generation with MAC example fails#15

• Code improvements:

  • Refactor Netlist/BlackBox #10
  • CPP special-case conversion of Control.Exception.Base.irrefutPatError #11