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| -rw-r--r-- | docs/ReleaseNotes.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index a0df1890987..6dcca287fe1 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -74,6 +74,15 @@ Non-comprehensive list of changes in this release Changes to the LLVM IR ---------------------- +* The fast-math-flags (FMF) have been updated. Previously, the 'fast' flag + indicated that floating-point reassociation was allowed and all other flags + were set too. The 'fast' flag still exists, but there is a new flag called + 'reassoc' to indicate specifically that reassociation is allowed. A new bit + called 'afn' was also added to selectively allow approximations for common + mathlib functions like square-root. The new flags provide more flexibility + to enable/disable specific floating-point optimizations. Making the + optimizer respond appropriately to these flags is an ongoing effort. + Changes to the AArch64 Target ----------------------------- |