Update README.md

README.md

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 # stm32f4xxx-SIMD-add
 This is a demostration of SIMD code in stm32f4xxx microcontroller,this project is made on [Embitz IDE](https://www.embitz.org/)
 
-Now I’m fan of the **pair-programming** style of coding the solution because it lets you know the efficiency of your counterpart better. So lets devise this solution together, lets start with some information about** SIMD programming **in ARM microcontroller. 
-**What is SIMD?**
+Now I’m fan of the **pair-programming** style of coding the solution because it lets you know the efficiency of your counterpart better. So lets devise this solution together, lets start with some information about **SIMD programming** in ARM microcontroller. 
+**What is SIMD?** 
+
 SIMD stands for Single Instruction stream and Multiple Data stream . The same set of instructions is executed in parallel to different sets of data. 
 This reduces the amount of hardware control logic needed by N times for the same amount of calculations, where N is the width of the SIMD unit. 
 SIMD computation model is show as follows: 
 ![SIMD pipleine.](main-qimg-84df36e69e2decf629e743020eb31fd0.jpg) 
 Instruction pipeline is very different concept from SIMD, the instruction pipeline system is accepting multiple instruction which are issued by dispatcher of the CPU, which then afterwards would have to complete the instruction cycle.
-Pipelining does not increase the number of instruction *streams* being processed in parallel; the single stream simply flows through a longer channel as it were. 
+Pipelining does not increase the number of instruction *streams* being processed in parallel; the single stream simply flows through a longer channel as it were. **So pipelining from the programmer’s perspective can be called SISD.** 
 
-SIMD is a type of machine which has one hardware instruction pointer and multiple hardware channels to write the data to memory. The SIMD is very different from pipelining where the SIMD is a machine which is executing a single instruction over the multiple data pieces. **So pipelining from the programmer’s perspective can be called SISD.**  
+SIMD is a type of machine which has one hardware instruction pointer and multiple hardware channels to write the data to memory. The SIMD is very different from pipelining where the SIMD is a machine which is executing a single instruction over the multiple data pieces. 
 
 The instruction pipeline is way of bringing the concept of single-core CPU parallelism, so from the programmer's perspective it is SISD while from the hardware perspective it is more like MIMD.