[PATCH] D91242: [RISCV] Custom lowering of SET_ROUNDING

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

If this gets used in a function that does floating point, what prevents the machine schedulers from reordering the FP instructions with this? Don't we need to model FRM as a register and make the FP instructions implicitly use it? You'd also need to be using the constrained FP intrinsics which aren't implemented for RISCV yet.


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  https://reviews.llvm.org/D91242/new/

https://reviews.llvm.org/D91242