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Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- To: tim at hollebeek dot com, torvalds at transmeta dot com
- Subject: Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- From: dewar at gnat dot com
- Date: Wed, 1 Aug 2001 13:13:43 -0400 (EDT)
- Cc: Theodore dot Papadopoulo at sophia dot inria dot fr, amylaar at redhat dot com,aoliva at redhat dot com, dewar at gnat dot com, gcc at gcc dot gnu dot org,gdr at codesourcery dot com, moshier at moshier dot ne dot mediaone dot net,tprince at computer dot org
a/2.0/2.0 will never yield zero if a is non-zero
a/4.0 may indeed yield zero if a is the smallest number
Indeed if one saw a/2.0/2.0 that's pretty peculiar, and it would not be
unreasonable to guess that the properly of not yielding zero was being
exploited :-)