95. Macro-Based Register Config Helper

In embedded systems, registers are often configured by setting specific bits. To make the code cleaner and reusable, firmware developers use macros to set fields in a register.

You are given a 16-bit control register layout:

Your task is to:

• Write macros to:
  
  • Set the ENABLE bit
  • Set the MODE field
  • Set the SPEED field
• Read ENABLE, MODE, SPEED from input
• Use the macros to pack a final 16-bit register value
• RESERVED bits (6–7) must be left 0

Example-1

Input: enable = 1, mode = 2, speed = 4
Output: 37
(Binary: 0000 0000 0010 0101)

Example-2

Input: enable = 0, mode = 1, speed = 3
Output: 26
(Binary: 0000 0000 0001 1010)