Re: [Tinycc-devel] inline assembly problem with cmovcl/cmovbl

[Michael Matz]

Hi,

On Sat, 2 Dec 2017, Somchai Smythe wrote:

> I realize there are other ways to get this cpuid information, but if I
> wanted to use cmovcl in some other code I think the inline assembler
> really is broken.  I tried the synonym cmovbl, but it didn't work
> either.  Both cmovc and cmovb are listed in intel's manual as
> generating 0x04 0x42 /r, so I think they are just two mnemonics for
> the same instruction.  If I delete the 'l' suffix, and use bare
> 'cmovc' (or bare 'cmovb'), it will compile.

And that's really the right solution: Unlike e.g. mov and push cmovCC 
always has register operands from which the size can be inferred, so it's 
always okay to remove the suffix.

But I've now added some code to mob which accepts (and ignores) size 
suffixes for cmovCC in a way that doesn't blow up our assembler tables 
even more, so your example should work now.


Ciao,
Michael.