#9435: x86 sse4.2 popCnt16# needs to zero-extend its result -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 (NCG) | Keywords: Resolution: | Architecture: x86_64 (amd64) Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: Incorrect | Related Tickets: result at runtime | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rwbarton): `popCnt8#` is affected too, but (possibly by luck, possibly not) we reuse the source register as the destination register and we needed to zero- extend the source anyways as there is no 8-bit `popcnt` instruction. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9435#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler