#4914: FPU initialization required again
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Reporter: aruiz | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 7.0.3
Component: Compiler (NCG) | Version: 7.0.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: x86 | Failure: Incorrect result at runtime
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Comment(by simonmar):
In the patch
{{{
Implement SSE2 floating-point support in the x86 native code generator
(#594)
}}}
I "optimised" the x87 backend to avoid some of the `ffree`s that seemed
unnecessary. It's entirely possible that I got this wrong (but I just
took a quick look and did't see any obvious problems).
What we ought to do is make a small C function that will fail if the x87
stack is non-empty, and have the RTS call it at shutdown time. Then
running the testsuite should find a smaller failure case. I'm a little
busy to do this right now, but if anyone else wants to have a go please go
ahead.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4914#comment:3>
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