[cfe-dev] MSVC compiler intrinsics, need for direction.

[Bo Persson]

Francois Pichet wrote:

> On Wed, Oct 6, 2010 at 10:59 AM, Douglas Gregor <dgregor at apple.com>
> wrote:
>>
>> On Oct 6, 2010, at 7:58 AM, Francois Pichet wrote:
>>
>>> I did some research and it will be easier than I thought.
>>> With the exception of __noop and __assume (possibly more), MSVC
>>> intrinsics require a prototype.
>>> So they will be handled like normal functions by clang.
>>
>> Where does this prototype come from?
>
> #include <intrin.h>

Just a helpful(?) comment about intrin.h being larger for MSVC10 than 
for MSVC8 or 9, and that not all of the functions are documented by 
MSDN (or the Visual Studio help files).

This effort also obviously duplicates some of the work done by Howard 
Hinnant to define a compiler API for C++0x <atomic>. Do we want 
several intrinsic functions doing the same thing?


Bo Persson