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Re: PATCH: New approach to --with-cpu, take 4


At Thu, 1 Aug 2002 21:45:40 +0000 (UTC), "Daniel Jacobowitz" wrote:
> See the earlier discussion with Richard about this.  Right now, if you
> have -mips3 -mips16 on the command line, you won't get -mips3 code :)
> At least that's what I was told.
> 
> The comment could use some thinking though.

Ahh, but, to my understanding, there is a difference!

if you say "-mips3 -mips16" you get "mips3"-flavored mips16.

vs. "-mips1 -mips16" in which case you get "mips1"-flavored mips16.

e.g. consider the dsubu vs. subu mips16 instructions (see
mips16-opc.c).


assume your default is -mips1.

if you say -mips1, you want "mips1-flavored" mips16.

if you say "-mips3 -mips16", then you do _not_ want the default of
-mips1 to be applied.


i think to get this right you need to check all of the -mipsN flags
independently.



chris


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