| Issue |
153521
|
| Summary |
About division on amdgpu backend
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
0oyyo0
|
I'm looking for information on the AMD GPU backend's support for integer division. I haven't found any instructions related to integer division in the ISA documentation, and the code I see for division, such as in AMDGPUCodeGenPrepare.cpp and SIISelLowering.cpp, uses other methods for calculation, e.g. (a/b---->a*(1/b)) . Therefore, I'd like to understand the AMD GPU hardware's support for division and why it's converted to other methods. I suspect it's because division is time-consuming.
One conversion method is as follows:
<img width="1138" height="1061" alt="Image" src="" />
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