Hi William,
CMSIS DSP is not included in the S32DS, but you can download official release from ARM web site
CMSIS - Cortex Microcontroller Software Interface Standard - ARM
and use the library in your project.
You can also use AMMCLIB SDK (included in S32DS). AMMCLIB has many DSP functions and have better performance than CMSIS DPS.
Jiri
If we can use AMMCLIB in PE