Date: Sun, 16 Nov 1997 19:22:00 -0800 (PST) Message-Id: <199711170322.TAA02323@adit.ap.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" To: heo AT turbotek DOT co DOT kr, djgpp AT delorie DOT com From: Nate Eldredge Subject: Re: i386 as assembler manual and fsubrp instruncion in as. Precedence: bulk At 03:56 11/10/1997 +0900, Heo, Sung-Gwan wrote: >Why does the as assembler use 'FSUBRP' mnemonic for opcode 'DE E9' which >works really as 'FSUBP' instruction? I don't know, but it may be some bug-compatibility issue with AT&T's UNIX 386 assembler, which `as' is intended to be compatible with. >And Where can I get the as >assembler manual concerning the instructions? There's no such thing, per se. But the info docs for `as' have a section on general syntax and opcode-name issues, see the node "i386-Dependent". For the definitive example, you can look at `as's source. Get the binutils source distribution, and see the file `opcodes/i386-dis.c'. I looked at that file. It seems that `fsubp' and `fsubrp' are different according to `as'. You may want to investigate this further, and report it as a bug if it seems to warrant it. Nate Eldredge eldredge AT ap DOT net