Re: [GHC] #867: Integer arithmetic gives the wrong answer on amd64/Linux

2006-09-27 Thread GHC 
#867: Integer arithmetic gives the wrong answer on amd64/Linux
---+
  Reporter:  igloo |  Owner:
  Type:  bug   | Status:  closed
  Priority:  normal|  Milestone:
 Component:  Compiler  |Version:  6.4.1 
  Severity:  normal| Resolution:  fixed 
  Keywords:| Os:  Linux 
Difficulty:  Unknown   |   Architecture:  x86_64 (amd64)
---+
Changes (by igloo):

  * resolution:  = fixed
  * status:  new = closed

Comment:

 Fixed by:
 {{{
 Thu Sep 28 01:48:06 BST 2006  Ian Lynagh [EMAIL PROTECTED]
   * Fix mulIntMayOflo on 64-bit arches; fixes trac #867
   We were assuming we could multiply 2 32-bit numbers without overflowing
   a 64-bit number, but we can't as the top bit is the sign bit.
 }}}
 Test is arith019.

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/867
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler___
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs

[GHC] #867: Integer arithmetic gives the wrong answer on amd64/Linux

2006-08-15 Thread GHC 
#867: Integer arithmetic gives the wrong answer on amd64/Linux
---+
Reporter:  igloo   |Owner: 
Type:  bug |   Status:  new
Priority:  normal  |Milestone: 
   Component:  Compiler|  Version:  6.4.1  
Severity:  normal  | Keywords: 
  Os:  Linux   |   Difficulty:  Unknown
Architecture:  x86_64 (amd64)  |  
---+
On x86 I get:

 {{{
 Prelude reverse $ take 10 $ reverse $ show $ sum [ x ^ x | x - [1..1000]
 ]
 9110846700
 }}}

 which is correct, but on amd64/Linux I get:

 {{{
 Prelude reverse $ take 10 $ reverse $ show $ sum [ x ^ x | x - [1..1000]
 ]
 0612504812
 }}}

 Both ghci's above are 6.4.1, but I also see it with the HEAD (a few days
 old).

 Seen on Debian, Gentoo and rpath distributions.


 Thanks
 Ian

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/867
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler___
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs

Re: [GHC] #867: Integer arithmetic gives the wrong answer on amd64/Linux

2006-08-15 Thread GHC 
#867: Integer arithmetic gives the wrong answer on amd64/Linux
---+
  Reporter:  igloo |  Owner:
  Type:  bug   | Status:  new   
  Priority:  normal|  Milestone:
 Component:  Compiler  |Version:  6.4.1 
  Severity:  normal| Resolution:
  Keywords:| Os:  Linux 
Difficulty:  Unknown   |   Architecture:  x86_64 (amd64)
---+
Comment (by duncan):

 I get the same results with ghc-6.4.2 and ghc-6.5.20060724 on my amd64
 box.

 It's fine in hugs on the amd64 and fine with ghc-6.4.2 on my sparc box. On
 both boxes I'm using gmp-4.1.4 (gentoo revision 3).

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/867
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler___
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs