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Re: [RFC PATCH, x86_64] Use -mno-sse[,2] to fall back to x87 FP argument passing convention


Hi,

On Wed, 4 Oct 2006, Uros Bizjak wrote:

> I would like to present a kind of x86_64 ABI enhancement for FP types, 
> where argument passing convention would follow x87 argument passing 
> convention.

Argh.

> In current state of x86_64 affairs, user can select -mfpmath=387 to 
> instruct the compiler to use x87 FP instructions.

FWIW, I think -mfpmath=387 should actually give an error with -m64.  I 
want all traces of x87 to die a silent death.  For x86 that's impossible, 
we should not do anything to make it impossible for x86-64.


Ciao,
Michael.


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