On 27/02/14 11:07, Andrew Haley wrote:
Over the years there has been a great deal of traffic on these lists
caused by misunderstandings of GCC's inline assembler. That's partly
because it's inherently tricky, but the existing documentation needs
to be improved.
dw <limegreenso...@yahoo.com> has done a fairly thorough reworking of
the documentation. I've helped a bit.
Section 6.41 of the GCC manual has been rewritten. It has become:
6.41 How to Use Inline Assembly Language in C Code
6.41.1 Basic Asm - Assembler Instructions with No Operands
6.41.2 Extended Asm - Assembler Instructions with C Expression Operands
We could simply post the patch to GCC-patches and have at it, but I
think it's better to discuss the document here first. You can read it
at
http://www.LimeGreenSocks.com/gcc/Basic-Asm.html
http://www.LimeGreenSocks.com/gcc/Extended-Asm.html
http://www.LimeGreenSocks.com/gcc/extend04.zip (contains .texi, .patch,
and affected html pages)
All comments are very welcome.
Hi Andrew, dw,
Thanks for doing this!
In the Extended Asm documentation: Other format strings section:
"'%=' outputs a number that is unique to each instruction in the entire
compilation."
I find the term 'instruction' to be confusing here. From what I understand the
number is unique to each asm statement, which may contain multiple assembly
instructions. IMHO it would be clearer to say "unique to each asm statement"
Kyrill
Andrew.
