-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/30/11 08:19, Richard Guenther wrote:
> > Well, I'm not sure that strict-align targets that provide byte access do > not simply hide the issue inside the CPU (thus, perform the read-modify-write > there and do not guarantee any atomicity unless you ask for it). Certainly some do this internally, but that's clearly out of our control. However, some really do sub-word accesses. I even vaguely remember this being controllable by bits in page table entries on one architecture. You could set the bit which meant if I ask for a byte access, then do it byte-wise, otherwise the processor would do a read-modify-write. Clearly this was meant to make it easier for dealing with memory mapped devices. Jeff -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNlJQWAAoJEBRtltQi2kC7t0IIAJTpXGIyWcIpWqk26ofieuLc T7PIBagNARbqEU2NwzgjeUyH4HMhCgwnAX8T4WXg2JJRXsZwxQPmKfk0x3mn6yBV z60TISwtx53LEnqbLQG5FIU4QLyOcBOGuAFabyVcsT07tKE/wmGjDBkypbsBhUuw ZFNEY7jausQGkaRy1ObxL4VWejk51XvcqNU2ReqjQJUvbS9UlpTNoopMixORG6Hb qb4LF/Fr9S9cckB3oBxy4pZrdEd7/rlAroMoRXw2JwEbGNyfc9EACKtcXbopakCu XnPxjsf4eVYNDl5jSf3r8w70fX5vqUimyfVeQqi49IcImqXGlfd/8US1ptOgZQE= =WMAs -----END PGP SIGNATURE-----
