Re: [BUGFIX] Fix AES-NI CTR optimization compiling failure with gas2.16.1

[Avi Kivity]

On 03/12/2010 09:01 AM, Huang Ying wrote:
> Andrew Morton reported that AES-NI CTR optimization failed to compile
> with gas 2.16.1, the error message is as follow:
>
> arch/x86/crypto/aesni-intel_asm.S: Assembler messages:
> arch/x86/crypto/aesni-intel_asm.S:752: Error: suffix or operands invalid for `movq'
> arch/x86/crypto/aesni-intel_asm.S:753: Error: suffix or operands invalid for `movq'
>
> To fix this, a gas macro is defined to assemble movq with 64bit
> general purpose registers and XMM registers. The macro will generate
> the raw .byte sequence for needed instructions.
>
>    

Eventually you'll port the entire assembler into macros, as instructions 
are introduced more frequently that people upgrade their assemblers.  
Maybe we should disable the new features and warn people (and distros) 
to upgrade their tools instead.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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