Changelog for the clash-ghc package

0.6 October 3rd 2015

• New features:
  • Support clash-prelude-0.10
  • Pattern matching on CLaSH.Sized.Vector’s :> is now supported
  • Unroll “definitions” of the following primitives: fold, dfold, foldr

0.5.15 September 21st 2015

• New features:

  • Report simulation time in (System)Verilog assert messages

• Fixes bugs:

  • Performance bug: top-level definitions of type “Signal” erroneously inlined.
  • Fix Index maxBound #79

0.5.14 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:

  • Converting Bool to Unsigned generates broken VHDL #77
  • 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

0.5.13 September 8th 2015

• Fixes bugs:
  • Cannot translate GHC MachLabel literal
  • Maybe (Index n) not translatable to VHDL #75

0.5.12 September 7th 2015

• New features:

  • Modest compilation time speed-up. Compilation time of the I2C module on my machine went down from 43s to 24s, and maximum memory usage went down from 840 MB to 700 MB.

• Fixes bugs:

  • Bug in VHDL ROM generation #69
  • Clash running out of memory on Simple-ish project #70
  • Fix asyncRom VHDL primitive #71
  • Fix primitive for CLaSH.Sized.Internal.Signed.size# #72
  • rem and quot on Signed are broken #73

0.5.11 August 2nd 2015

• New features:
  • Re-enable GHC’s strictness analysis pass, which improves dead-code removal, which hopefully leads to smaller circuits.

0.5.10 July 9th 2015

• New features:
  • Use new VHDL backend which outputs VHDL-93 instead of VHDL-2002: generated VHDL is now accepted by a larger number of tools.
  • Treat all so-called bottom values (error "FOO", let x = x in x, etc.) occuring in installed libraries as undefined. Before, there were (very) rare situations where we couldn’t find the expressions belonging to a function and demanded a BlackBox, even though we knew the expression would be a bottom value. Now, we stop demanding a BlackBox for such a function and simply treat it as undefined, thus allowing a greater range of circuit descriptions that we can compile.

0.5.9 June 26th 2015

• New features:

  • Use new verilog backend which outputs Verilog-2001 instead of Verilog-2005: generated Verilog is now accepted by Altera/Quartus

• Fixes bugs:

  • --systemverilog switch incorrectly generates verilog code instead of systemverilog code

0.5.8 June 25th 2015

• New features:
  • Support for copying string literals from Haskell to generated code
  • Support clash-prelude-0.9
  • Size at below which functions are always inlined is configurable, run with -clash-inline-below=N to set the size limit to N

0.5.7 June 3rd 2015

• New features:
  • New Verilog backend, run :verilog in interactive mode, or --verilog for batch mode
  • Generated component names are prefixed by the name of the module containing the topEntity

0.5.6 May 18th 2015

• New features:

  • Inlining limit is configurable, run with -clash-inline-limit=N to set the inlining limit to N
  • Specialisation limit is configurable, run with clash-spec-limit=N to set the inline limit to N
  • Debug level is configurable, run with -clash-debug <LEVEL> where <LEVEL> can be: DebugNone, DebugFinal, DebugName, DebugApplied, DebugAll. Be default, clash runs with DebugNone.

• Fixes bugs:

  • Extend evaluator for GHC.Integer.Type.minusInteger and CLaSH.Promoted.Nat.SNat.

0.5.5 May 5th 2015

• New features:
  • TopEntity wrappers are now specified as ANN annotation pragmas #42

0.5.4 May 1st 2015

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

0.5.3 April 24th 2015

• Fixes bugs:
  • Fix bug where not enough array type definitions were created by the VHDL backend

0.5.2 April 21st 2015

• Use latest ghc-typelits-natnormalise

0.5.1 April 20th 2015

• New features:
  • GHC 7.10 support
  • Update to clash-prelude 0.7.2
  • Use http://hackage.haskell.org/package/ghc-typelits-natnormalise typechecker plugin for better type-level natural number handling

0.5 March 11th 2015

• New features:
  • SystemVerilog backend. #45

0.4.1 February 4th 2015

• Include bug fixes from clash-lib 0.4.1

0.4 November 17th 2014

• New features:

  • Support for clash-prelude 0.6

• Fixes bugs:

  • clash-ghc ignores “-package-db” flag #35

0.3.3 August 12th 2014

• Fixes bugs:
  • Compile with GHC 7.8.3 #31

0.3.2 June 5th 2014

• Fixes bugs:
  • Type synonym improperly expanded #17
  • BlackBox for Signed maxBound and minBound generate incorrect VHDL. #19
  • Generate failure code in the VHDL for recSelError #23

0.3.1 May 15th 2014

• New features:

  • Hardcode fromInteger for Signed and Unsigned #9
  • Better blackbox operation for vindex #12
  • Replace VHDL default hole by error hole #13

• Fixes bugs:

  • Update GHC2Core.hs #1
  • primitives (clash.sized.vector) #2
  • Type families are not expanded #3
  • Incorrect vhdl generation for default value in blackbox #6
  • Missing begin keyword in Signed/Unsigned JSON files #16