MicroZed Chronicles リスト http://adiuvoengineering.com/?page_id=285
@ Adam Taylor blog
https://forums.xilinx.com/t5/Xcell-Daily-Blog/The-Zynq-PS-PL-Part-Seven-Adam-Taylor-s-MicroZed-Chronicles-Part/ba-p/438888
To perform the final addition with constant C we need to have the decimal point aligned. Therefore, we need to divide the results and Ax2 and Bx by a power of two to align the decimal points with C. The result will also be formatted in this value which is 8,8.
| A Format | Bx Format | Cx2 Format | |
|---|---|---|---|
| 8,8 | 5,27 | 8,40 | |
| *1 | 2^19 | 2^32 |
ここで*1: Divider to align decimal points for addition
8,8 > 8 integer bits and 8 fractional bits
上記の表の理解としては、
- 5,27をX,8の形式にするには 19ビットずらすので2^19
- 8,40をX,8の形式にするには 32ビットずらすので2^32