Why is there no FPU on (most) DSP chips?

1. Can we perform floating-point operations without the FPU?
2. What is the FPU responsible for?
3. Why do we need floating point unit?
4. What is floating-point DSP processor?

Can we perform floating-point operations without the FPU?

You can do floating point calculations without FPU. Usually, the C compiler will have built-in software libraries to do this. So, you won't even notice the difference (except for performance, of course). Whether you should use floating point is a different questions.

What is the FPU responsible for?

FPUs have three core duties: public order management, protection of United Nations personnel and facilities and support to such police operations that require a concerted response but do not respond to military threats.

Why do we need floating point unit?

A floating-point unit (FPU, colloquially a math coprocessor) is a part of a computer system specially designed to carry out operations on floating-point numbers. Typical operations are addition, subtraction, multiplication, division, and square root.

What is floating-point DSP processor?

Floating-point DSPs represent and manipulate rational numbers via a minimum of 32 bits in a manner similar to scientific notation, where a number is represented with a mantissa and an exponent (e.g., A x 2^B, where 'A' is the mantissa and 'B' is the exponent), yielding up to 4,294,967,296 possible bit patterns (2³²).