On Feb 25, 2011, at 1:33 AM, Anton Shterenlikht wrote: > Can somebody please confirm that denormal > are not available on ia64, see below. Itanium has denormals. However FP_X_DNML has not been defined, because it's non-standard: ns1% svn log -c121332 lib/libc/ia64/gen/fpsetmask.c ------------------------------------------------------------------------ r121332 | marcel | 2003-10-22 02:00:07 -0700 (Wed, 22 Oct 2003) | 11 lines The FP status register allows for 6 traps to be masked. One of them, the denormal/unnormal trap, is not a standard IEEE trap. We did not exclude it from being returned by fpgetmask(), nor did we make sure that fpsetmask() didn't clobber it. Since the non-IEEE trap is not part of fp_except_t, users of ifpgetmask()/fpsetmask() would be confronted with unexpected behaviour, one of which is a SIGFPE for denormal/unnormal FP results. This commit makes sure that we don't leak the denormal/unnormal mask bit in fp_except_t and also that we don't clobber it. ------------------------------------------------------------------------ -- Marcel Moolenaar xcllnt_at_mac.comReceived on Fri Feb 25 2011 - 22:24:06 UTC
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