math libraries

[Ilya Yaroshenko via Digitalmars-d]

Hi!

1. core.stdc.math - C math (sin(double), sinf(float),
sinl(real)). This functions are linked to libm.

2. core.stdc.tgmath - C math overloads (single name for
float/double/real). See also
http://www.cplusplus.com/reference/ctgmath/ . This functions are
link to libm.

3. core.math - Builtin mathematical intrinsics. They can be
executed at compile time.

4. std.math - Standart math module. Some functions can be
executed at compile time. Many functions defined only for `real`.
Work for `double` and `float` in progress.

Best Regards,
Ilya

On Thursday, 12 February 2015 at 20:56:34 UTC, Luc Bourhis wrote:
> What is the difference between (i) core.math, (ii) std.math, 
> (iii) core.stdc.math and (iv) core.stdc.tgmath? (iv) falls back 
> on (iii) as far as I can tell. (i) and (ii) seem to emit the 
> same old x87 instructions, like fsin e.g., even for double and 
> float. What's the difference?
>
> So that leaves only core.stdc.math which may use fast SSE2 
> scalar instructions. It looks like it may do so, from a glance 
> at the assembly with GDB. Could somebody shine some light?