As Yuta Mukai pointed out, the manual wrongly said that LS64 is
enabled by default for Armv8.7-A and above, and for Armv9.2-A
and above. LS64 is not mandatory at any architecture level
(and the code correctly implemented that).
I think this was a leftover from an early version of the spec.
gcc/
* doc/invoke.texi: Fix documentation of LS64 so that it's
not implied by Armv8.7-A or Armv9.2-A.
---
Tested on aarch64-linux-gnu & pushed to trunk. I'll backport
to branches soon.
Thanks to Yuta for the spot.
Richard
gcc/doc/invoke.texi | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 28ef2cde43d..7146163d66d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -21443,12 +21443,12 @@ and the features that they enable by default:
@item @samp{armv8.4-a} @tab Armv8.4-A @tab @samp{armv8.3-a}, @samp{+flagm},
@samp{+fp16fml}, @samp{+dotprod}
@item @samp{armv8.5-a} @tab Armv8.5-A @tab @samp{armv8.4-a}, @samp{+sb},
@samp{+ssbs}, @samp{+predres}
@item @samp{armv8.6-a} @tab Armv8.6-A @tab @samp{armv8.5-a}, @samp{+bf16},
@samp{+i8mm}
-@item @samp{armv8.7-a} @tab Armv8.7-A @tab @samp{armv8.6-a}, @samp{+ls64}
+@item @samp{armv8.7-a} @tab Armv8.7-A @tab @samp{armv8.6-a}
@item @samp{armv8.8-a} @tab Armv8.8-a @tab @samp{armv8.7-a}, @samp{+mops}
@item @samp{armv8.9-a} @tab Armv8.9-a @tab @samp{armv8.8-a}
@item @samp{armv9-a} @tab Armv9-A @tab @samp{armv8.5-a}, @samp{+sve},
@samp{+sve2}
@item @samp{armv9.1-a} @tab Armv9.1-A @tab @samp{armv9-a}, @samp{+bf16},
@samp{+i8mm}
-@item @samp{armv9.2-a} @tab Armv9.2-A @tab @samp{armv9.1-a}, @samp{+ls64}
+@item @samp{armv9.2-a} @tab Armv9.2-A @tab @samp{armv9.1-a}
@item @samp{armv9.3-a} @tab Armv9.3-A @tab @samp{armv9.2-a}, @samp{+mops}
@item @samp{armv9.4-a} @tab Armv9.4-A @tab @samp{armv9.3-a}
@item @samp{armv8-r} @tab Armv8-R @tab @samp{armv8-r}
@@ -21773,7 +21773,6 @@ default for @option{-march=armv8.6-a}. Use of this
option with architectures
prior to Armv8.2-A is not supported.
@item ls64
Enable the 64-byte atomic load and store instructions for accelerators.
-This option is enabled by default for @option{-march=armv8.7-a}.
@item mops
Enable the instructions to accelerate memory operations like @code{memcpy},
@code{memmove}, @code{memset}. This option is enabled by default for
--
2.25.1
