#12736: Calling a complex Haskell function (obtained via FFI wrapper function) from MSVC 64-bit C code (passed in as FunPtr) can leave SSE2 registers in the XMM6-XMM15 range modified -------------------------------------+------------------------------------- Reporter: bavism | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (FFI) | Version: 7.10.3 Resolution: | Keywords: | ffi,registers,sse2,clobber,xmm Operating System: Windows | Architecture: x86_64 | (amd64) Type of failure: Incorrect result | Test Case: at runtime | https://github.com/bavis-m/raycast Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): To clarify: you could also compile your c code to assume it's in an avx/avx2 microarchtiecture to see if that works. But if you wanna support sse2 targets a teeny bit of xmm read write code might help -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12736#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler