Sharing vector math routines?

[Steve Ellcey]

I have a question/thought about the libmvec routines that I am working
on for Aarch64 and that Bert Tenjy has been working on for PPC64.

Given that both of us are writing routines in C (vs. Assembly) I was
wondering if we should try to share the code/algorithms being used.
The vector types being used have different names (__Float32x4_t or
float32x4_t or 'vector float') but the names could be put in a macro
and then we could use a shared source file for the implementation.

So we could have a vector sinf like this for Aarch64:

#include <arm_neon.h>
#define VECSIZE 4
#define VECTYPE float32x4_t
#define BASETYPE float
#include "vec_sinf.c"

And for PPC it might be:

#include <altivec.h>
#define VECSIZE 4
#define VECTYPE vector float
#define BASETYPE float
#include "vec_sinf.c"

Then the shared vec_sinf.c could be written using VECSIZE, VECTYPE, and
BASETYPE and shared between these and other platforms.

Steve Ellcey
sellcey@marvell.com