[Lightning] Run-time assembler for x86-64

[Gwenole Beauchesne]

Hi,

This is a public summary of private correspondance I had with Paolo,  
and per his request. I am the author of the x86-64 enhancements to the  
GNU Lightning code, originally derived from CCG, and used in Basilisk  
II, a GPL'ed 68k emulator.
<http://www.cebix.net/viewcvs/cebix/BasiliskII/src/uae_cpu/compiler/ 
codegen_x86.h>

I hereby authorize the re-use of this code into GNU Lightning under the  
LGPL.

I do apologize for this very long delay. The code should now be mature  
enough, though I have not touched it for months. I can't tell for GNU  
Lightning but the generated code from a Basilisk II POV is correct and  
a subset was compared against binutils the disassembler.

HTH,
Gwenole.