https://sourceware.org/bugzilla/show_bug.cgi?id=20771
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |amodra at gmail dot com
Resolution|--- |WONTFIX
--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
See this comment from include/opcode/i386.h
/* The SystemV/386 SVR3.2 assembler, and probably all AT&T derived
ix86 Unix assemblers, generate floating point instructions with
reversed source and destination registers in certain cases.
Unfortunately, gcc and possibly many other programs use this
reversed syntax, so we're stuck with it.
eg. `fsub %st(3),%st' results in st = st - st(3) as expected, but
`fsub %st,%st(3)' results in st(3) = st - st(3), rather than
the expected st(3) = st(3) - st
This happens with all the non-commutative arithmetic floating point
operations with two register operands, where the source register is
%st, and destination register is %st(i).
The affected opcode map is dceX, dcfX, deeX, defX. */
If you really care, you can define SYSV386_COMPAT to 0 but please read the
comment there too..
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
bug-binutils mailing list
bug-binutils@gnu.org
https://lists.gnu.org/mailman/listinfo/bug-binutils
