[arm] Remove +nofp from -mcpu=cortex-m55 options

Turns out for consistency with LLVM the +nofp option shouldn't remove ALL of FP and MVE, just the FP part of MVE.
This requires more surgery with feature bits so for GCC 10 I'd rather just not support +nofp for -mcpu=cortex-m55
and implement it properly for GCC 11.

2020-04-28  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	* config/arm/arm-cpus.in (cortex-m55): Remove +nofp option.
	* doc/invoke.texi (Arm Options): Remove -mcpu=cortex-m55 from +nofp option.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4c298b8c645d9dd3802b2bed0a31a63a0f7e118a..905d2b8a2f5377e8d6f526cfcbc0d7ddc4ac9aa8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-28  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       * config/arm/arm-cpus.in (cortex-m55): Remove +nofp option.
+       * doc/invoke.texi (Arm Options): Remove -mcpu=cortex-m55 from +nofp option.
+
 2020-04-28  Matthew Malcomson  <matthew.malcomson@arm.com>
            Jakub Jelinek  <jakub@redhat.com>
 

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 64b8ba705070600418a006b6a183447ebbe6719c..728be500b80656c42018954229fbd7117902945d 100644 (file)
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1509,7 +1509,6 @@ begin cpu cortex-m55
  tune flags LDSCHED
  architecture armv8.1-m.main+mve.fp+fp.dp
  isa quirk_no_asmcpu
- option nofp remove ALL_FP MVE_FP
  costs v7m
  vendor 41
 end cpu cortex-m55

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 04b84e3a10e759b40aaafb790e2ac58b7b4c70ce..fed38e88ae55d6d355c0317555803de5ee5c6c5e 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -18841,7 +18841,7 @@ Disables the floating-point and SIMD instructions on
 @samp{cortex-a8}, @samp{cortex-a9}, @samp{cortex-a12},
 @samp{cortex-a15}, @samp{cortex-a17}, @samp{cortex-a15.cortex-a7},
 @samp{cortex-a17.cortex-a7}, @samp{cortex-a32}, @samp{cortex-a35},
-@samp{cortex-a53},@samp{cortex-a55} and @samp{cortex-m55}.
+@samp{cortex-a53} and @samp{cortex-a55}.
 
 @item +nofp.dp
 Disables the double-precision component of the floating-point instructions