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From: "hjl at lucon dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/34001] Incorrect __attribute__ fastcall behavior
Date: Fri, 09 Nov 2007 16:55:00 -0000	[thread overview]
Message-ID: <20071109165509.4014.qmail@sourceware.org> (raw)
In-Reply-To: <bug-34001-15308@http.gcc.gnu.org/bugzilla/>



------- Comment #2 from hjl at lucon dot org  2007-11-09 16:55 -------
From

http://msdn2.microsoft.com/en-us/library/6xa169sk(VS.80).aspx

"The first two DWORD or smaller arguments are passed in ECX and EDX registers;
all other arguments are passed right to left."

But it isn't clear if it applies to structure/union. We tested all MS compilers
we have and verified that the above doesn't apply to structure/union. To make
fastcall compatible with MS compilers, we should only put scalar arguments
in ECX and EDX.


-- 

hjl at lucon dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |hjl at lucon dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-11-08 17:12:05         |2007-11-09 16:55:09
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34001


  parent reply	other threads:[~2007-11-09 16:55 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-05 23:40 [Bug c/34001] New: " zia at aracnet dot com
2007-11-05 23:58 ` [Bug target/34001] " pinskia at gcc dot gnu dot org
2007-11-08 17:12 ` hjl at lucon dot org
2007-11-09 16:55 ` hjl at lucon dot org [this message]
2007-11-09 17:34 ` hjl at lucon dot org
2007-11-12  3:27 ` [Bug target/34001] Incorrect x86 " hjl at lucon dot org
2007-11-16  4:52 ` hjl at lucon dot org
2007-11-26 23:19 ` hjl at lucon dot org
2007-11-27  2:36 ` hjl at lucon dot org
2007-11-28  1:20 ` hjl at gcc dot gnu dot org
2007-11-28  1:25 ` hjl at lucon dot org

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