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[Bug other/14708] description of -ffloat-store in gcc man page incorrect/inaccurate
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Mar 2004 06:36:32 -0000
- Subject: [Bug other/14708] description of -ffloat-store in gcc man page incorrect/inaccurate
- References: <20040324062915.14708.debian-gcc@lists.debian.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-24 06:36 -------
Looks fixed on the mainline:
Do not store floating point variables in registers, and inhibit other options that might change whether a
floating point value is taken from a register or memory.
This option prevents undesirable excess precision on machines such as the 68000 where the floating
registers (of the 68881) keep more precision than a double is supposed to have. Similarly for the x86
architecture. For most programs, the excess precision does only good, but a few programs rely on the
precise definition of IEEE floating point. Use -ffloat-store for such programs, after modifying them to
store all pertinent intermediate computations into variables.
Is this enough or is there more?
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What |Removed |Added
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Keywords| |documentation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14708