[FFmpeg-devel] [PATCH] MMX for Win64

Måns Rullgård mans
Sat May 3 19:35:04 CEST 2008

Jean-Baptiste Kempf <jb at videolan.org> writes:

> On Sat, May 03, 2008 at 10:43:13AM +0200, matthieu castet wrote :
>> Jean-Baptiste Kempf wrote:
>> > Assembler tries to make a pushl value, which is for x86_64 forbidden.
>> > Long is 32bit on Win64
>> > (http://technet.microsoft.com/en-us/library/bb496995.aspx).
>> > ssize_t, however, is portable between both archs."
>> > 
>> Yes but ffmpeg don't run only on win32 and win64. What make you think it 
>> will work under _all_ arch ?
> Why would using ssize_t or size_t break ?
> The only difference between LP64 and LLP64 is the long type.
> Using size_t wouldn't break it.

It's wrong to use size_t here.  There is no guarantee that size_t
is at all suitable.  For instance, it could legally be 64 bits on a
32-bit system, or 32 bits on a 64-bit system.

M?ns Rullg?rd
mans at mansr.com

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