to get M_PI from the platform headers and cast it to float.

computation function.

compilation time for very little benefit and maybe even confusion.

computed on demand with static initialisation.

fully initialised.

"shader" source directory since we have "gpu".

that are not explicitly real, even with namespace mistakes.

that x + y != x, and nextafter() which behaves like the C function.

functions are now about 20% faster.

bonus, multiplication or division by a power of two will be optimised as
a shift of the exponent.

missing includes.

add the corresponding unit test.

to modify their precision at runtime.

negative zero or negative nth roots are not handled.

multiplications where appropriate.

the 16-to-32-bit refactoring.

functions.

sin(pi/2-x). No loss in precision in theory.

with large values. Until now they were evaluating the Taylor series even
for huge values.

these functions.

so that their initialisation order ensures they have the proper values. Add
unit tests for these constants.

and simplify the Remez code accordingly.

multiplications by integers, especially powers of two.

accurate.

improved implementation of exp(), which relies on log().

addition and subtraction operators occurring when exponents were too
different.