[PATCH] D82525: [FPEnv] Intrinsics for access to FP control modes

[Serge Pavlov via Phabricator via llvm-commits]

sepavloff added a comment.

In D82525#4425234 <https://reviews.llvm.org/D82525#4425234>, @arsenm wrote:

> Can this be abandoned with get_fpenv / set_fpenv already pushed?

These are different intrinsics, and they correspond to different C functions. Control modes are a part of FP environment, but the latter contains also status bits. If a target has single FP status and control register, both `fegetenv` and `fegetmode` are implemented as reading from that register in glibc, but in `fegetmode` bits not related to control modes are cleared. If a target have different status and control registers, or FP environment is large in size (as on X86), `get_fpmode`/`set_fpmode` can be have faster implementation than `get_fpenv`/`set_fpenv`.


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https://reviews.llvm.org/D82525