[LLVMdev] OT: new here, dynamic/runtime compilation (in general)

[Chris Lattner]

On Oct 21, 2007, at 6:23 PM, BGB wrote:

> ok, just in my case, I guess I am a little fussy/weird, wanting  
> efficient dot and cross products  (if at all possible, though these  
> operations at present don't exist natively within SSE...), among  
> many other operations (length, lerp, renormalization, ..).
>
> then again, probably a fairly smart compiler could still get plenty  
> good results out of inline functions and intrinsics or something  
> (as it so happens, my compiler is not so smart here, so I made  
> these features builtin, and fell back to functions for more  
> involved operations, such as quaternion slerp, ...).
>

llvm-gcc and clang both fully support GCC style generic vectors and  
altivec/sse intrinsics.  In addition, clang supports "glsl" style  
vector permutations, direct vector element access, etc.  The LLVM  
optimizer and code generator supports many vector operations  
independent of the front-end syntax, as well as highly optimized code  
generation for Altivec and SSE.

-Chris


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