Changed the handling of variadic intrinsics a bit. Removed the -fp80 option and made real be 80bit floats on X86, this is what the D spec really says it should be and fixes a bunch of issues. Changed the handling of parameter attributes to a bit more generalized approach. Added sext/zext attributes for byte/short/ubyte/ushort parameters, fixes #60 . Parameter attribs now properly set for intrinsic calls if necessary. Made the tango.math.Math patch less intrusive. Fixed/added some mini tests.

extern(C) int printf(char*, ...);

void main()
{
    int a,b,c;
    a = int.max-1;
    b = 1;
    asm
    {
        mov EAX, a;
        mov ECX, b;
        add EAX, ECX;
        jo Loverflow;
        mov c, EAX;
    }

    printf("c == %d\n", c);
    assert(c == a+b);
    return;

Loverflow:
    assert(0, "overflow");
}