Floating point error with -msse2

[augustss]

Compile and run this program:

main = print (cos 0)

And you get

$ ghc -O2 -fforce-recomp -msse2 Main.hs
[1 of 1] Compiling Main             ( Main.hs, Main.o )
Linking Main.exe ...
$ ./Main
5.249681779125557e-308

(This is a bug in ghc 7.2.2, but that 7.2.2 is not one of the available version choices.)

[simonmar]

I have a fix for this in my validate queue.

[marlowsd@…]

commit 23a0ded304d9e2089e5f667fd08ae9436e741030

Author: Simon Marlow <marlowsd@gmail.com>
Date:   Thu Jan 5 14:01:58 2012 +0000

    We must emit DELTA pseudo-instructions when moving %esp (#5747)

 compiler/nativeGen/X86/CodeGen.hs |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

[igloo]

Merged as 67513012189fb96ac83096afd0e3b09fa30c4d99