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From: atari!apratt@AMES.ARC.NASA.GOV (Allan Pratt)
Newsgroups: gnu.gcc.bug
Subject: GAS and floating point
Message-ID: <8912132247.AA23147@atari.UUCP>
Date: 13 Dec 89 22:47:01 GMT
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Distribution: gnu
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I found a bug in the m68k-opcodes.h file concerning floating point:
the FScc instructions (fseq onward) have the wrong mode for their
argument: it should be "$" not "@".  "@" is data, including PC-relative.
"$" is data-alterable, which doesn't include PC-relative, and is
the right mode for these instructions.  Since GAS optimizes data
references when they're in the text segment into PC-relative references,
this can generate the wrong assembly code:

label:	fseq	label

This produces an "ftrapeq" instruction, because 'label' became 'pc@label'.

While I've got you on the line, I'd like to ask if there's any hope for
a Motorola-syntax assembler for 68K.  I can add "move.l" as an alias
for "movl" pretty easily, but the effective-address syntax still
eludes me.

============================================
Opinions expressed above do not necessarily	-- Allan Pratt, Atari Corp.
reflect those of Atari Corp. or anyone else.	  ...ames!atari!apratt