standards question

[Steve Chow]

is inline asm specified in any of the C standards or is it just an
addition some compilers provide?

 

[Guest]

is inline asm specified in any of the C standards or is it just an
addition some compilers provide?

no and yes.

Well, really, it's no but there is an appendix of
Common Extensions (appendix F.5 in the ANSI version)
that specifies

asm ( /character-string-literal/ );

but "the inclusion of any extension may cause a strictly
conforming program to invalid...". Also no syntax or semantics
are specified for character-string-literal.

So its an unstandardised extension. The assembler will
by necessity be different for each hardware platform
(at least!). Also even those implementaion that do
allow inline assembler don't all do it the way
Appendix F.5 suggests.