gcc and SIMD

[Ian Lance Taylor]

ranjith kumar <ranjit_kumar_b4u@yahoo.co.uk> writes:

> > > 2) In those header files all functions call
> > > _builtin_ia32_*. Where those functions(body) are
> > > defined?
> > 
> > They are intrinsic functions automatically defined
> > by the compiler.
> Please tell me in what file they are defined.

config/i386/i386.c defines the builtin functions support for x86 and
x86_64.  They expand into insn patterns described mostly in i386.md,
some in other .md files in that directory.

Ian