multiple conversion bugs in xmmintrin.h

[Timothy C Prince]

-----Original Message-----
From: Tanguy Fautr  <tfautre@pandora.be>
To: <bug-gcc@gnu.org>
Date: Thu, 1 May 2003 22:06:32 +0200
Subject: multiple conversion bugs in xmmintrin.h


PS: _mm_malloc() and _mm_free() doesn't seem to be implemented in the
version of GCC I have. Is it correct to use malloc() instead, assuming that
the returned address will always be aligned on 16 bytes?

No, but, unfortunately, that's a library issue.  On recent versions of glibc, you ought to get 8-byte alignment, but you need to fix it up to 16.  On Windows versions of gcc, you can't count on 8-byte alignment.  Those _mm_ prefixes normally just reflect wrappers on the standard malloc().  Maybe you could write and test your own, and persuade library implementors to add them.
Tim Prince