DSP enhancement instructions
To improve the ARM architecture for digital signal processing and multimedia applications, DSP instructions were added to the set.These are signified by an "E" in the name of the ARMv5TE and ARMv5TEJ architectures. E-variants also imply T,D,M and I.
The new instructions are common in digital signal processor architectures. They include variations on signed multiply–accumulate, saturated add and subtract, and count leading zeros.