#16258: PowerPC Big-Endian: ArithInt16, ArithInt8, ArithWord16, and ArithWord8 fail -------------------------------------+------------------------------------- Reporter: trommler | Owner: trommler Type: bug | Status: new Priority: normal | Milestone: 8.10.1 Component: Compiler | Version: 8.7 Resolution: | Keywords: Big-endian Operating System: Unknown/Multiple | Architecture: powerpc64 Type of failure: Incorrect result | Test Case: at runtime | primops/should_run/ArithInt16, | primops/should_run/ArithWord16, | primops/should_run/ArithWord8, | primops/should_run/ArithInt8 Blocked By: | Blocking: Related Tickets: #16222 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by trommler): I found the issue, patch is coming. Small integer values passed on the stack are not promoted to word size (stack slot size). We can get away with that on little endian systems where the small integer ends up in the Right (TM) place for a word size read. On big endian the small integer is written into the most significant bits of a word and the least significant bits contain random values. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16258#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler