[PATCH] D50004: [PowerPC] Emit xscpsgndp instead of xxlor when copying floating point scalar registers

Hiroshi Inoue via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Aug 2 08:56:55 PDT 2018


inouehrs added a comment.

> Does the comment about normalization only pertain to ISA 2.07?

As I browse the document, neither ISA 2.07 nor 3.0 mention about normalization by xscpsgndp.
https://reviews.llvm.org/P8 UM says xscpsgndp, xvcpsgndp and fmr are normalizing instruction. https://reviews.llvm.org/P9 UM say nothing.
Since fmr is also a normalizing instruction, I feel it is acceptable to use xscpsgndp for coping register.


https://reviews.llvm.org/D50004





More information about the llvm-commits mailing list