Date: Wed, 24 Mar 1999 17:11:01 -0500
From: Brian Paul <[EMAIL PROTECTED]>
Have you given any thought to this? In the original Mesa 3.1 beta
there was a simple framework for hooking in optimized FP code.
I think the hook to install the routines should be all hidden away in
some header file and all ugly ifdefs removed. Here is a suggested
layout:
1) Create a directory src/asm, here goes things like asm_386_xxx.S,
asm_sparc_xxx.S etc.
2) Create src/asm.h which looks something like:
extern ... install_arch_xform_asm(...)
extern ... install_arch_blend_asm(...)
So files like src/xform.c call their function.
3) Under src/asm we have a "asm_none.c" file which just implements
the above install_arch_*() functions as doing nothing.
4) Each asm support layer has several components, for example:
asm_i386_xform.S i386 vertex transformations
asm_i386_blend.S perhaps MMX blending routines
asm_i386.c installs the routines
and similarly for sparc etc. asm_i386.c is where you can
implement the checking of the processor type to install the
correct routines for example.
5) src/asm/Makefile magic to compile in the appropriate stuff and
create a libasm.o object which the toplevel makefile links into
the final Mesa lib...
Comments? I think it would be really nice to see all the ifdef
ASM_XXX stuff not be in the toplevel src/*.[ch] files, it's pretty
ugly. Next we can clean up similar stuff from src/mmath.h for
example.
Later,
David S. Miller
[EMAIL PROTECTED]
