| Issue |
180970
|
| Summary |
[RISC-V] Missed Opportunity for MULHR variants
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
christian-herber-nxp
|
There is a typical C code pattern, that can be implemented as a MULHR instruction.
https://godbolt.org/z/nhEje8qdc
Currently, the P extension is used for this, but only by using the widening multiplication.
The whole thing should be equivalent to a rounding MULH.
This is a common code sequence in NNs.
CMSIS-NN calls this function nn_doubling_high_mult_no_sat.
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