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Re: __rlwinm weirdness

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Re: __rlwinm weirdness

Subject: Re: __rlwinm weirdness
From: Chris Espinosa <email@hidden>
Date: Fri, 17 Feb 2006 14:00:14 -0800

On Feb 17, 2006, at 1:46 PM, Mark Thomas wrote:

Hi,
  Moving some code over from CodeWarrior, and the follow

result = __rlwinm( theValue,8, 0, 31 )

  Doesn't work the same if compiled on CodeWarrior as if theValue =
0x11223344, result will be 0x22334411.

  But if I execute the same code in Xcode and debugging the same thing
doesn't happen which is weird, any reason why ?

In Mac OS X's headers, __rlwinm is implemented as a macro expansion. If you happen to have a local with the name "val" it will collide with the placeholder in the macro and produce unexpected results.

Chris

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  >__rlwinm weirdness (From: Mark Thomas <email@hidden>)




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