About
The Zfa extension provides several new instructions to improve the performance of floating point code for RISC-V. Of particular importance is the fli instruction for loading predefined constants into FP registers, but there are also fround instructions and additional comparisons/min/max instructions. The fli instructions will typically replace a load from the constant pool, so they're faster, smaller and reduce the data footprint of FP code as well.
This work appears to be complete for LLVM.
Dependencies
Status
Updates
- Upstream LLVM has integrated Zfa support
- Project reported as priority for 2H23