STM32 non floating point unit chips
In the quote, there is no runtime fp computation, it is made by preprocessor and included to code as a literal. If there would be a computation, it would be handled by compiler low level libraries, which in the case of GCC, you would see fp functions fused into the final binary from one particular version of libgcc.a, depending of hard/soft fp usage. Here on my system there are two versions of libgcc.a for cortex-m4:

/usr/lib/gcc/arm-none-eabi/5.3.0/armv7e-m/softfp/libgcc.a
/usr/lib/gcc/arm-none-eabi/5.3.0/armv7e-m/fpu/libgcc.a

notice: libgcc.a is not only about fp.