[gcc(refs/users/meissner/heads/work055)] Require prefixed support for XXSPLTI* and float128-hw for lxvkq.

[gcc(refs/users/meissner/heads/work055)] Require prefixed support for XXSPLTI* and float128-hw for lxvkq.

[Michael Meissner]

https://gcc.gnu.org/g:f9c8ad2a4f06252a1404859b48b2f92c5d6bdb6f

commit f9c8ad2a4f06252a1404859b48b2f92c5d6bdb6f
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Jun 14 16:51:47 2021 -0400

    Require prefixed support for XXSPLTI* and float128-hw for lxvkq.
    
    gcc/
    2021-06-09  Michael Meissner  <meissner@linux.ibm.com>
    
            * config/rs6000/rs6000.c (rs6000_option_override_internal):
            Require -mprefixed for -mxxspltiw, -mxxspltidp, and
            -mxxsplti32dx.  Require -mfloat128-hardware for -mlxvkq.

Diff:
---
 gcc/config/rs6000/rs6000.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index ac01b46e864..a5555045c1c 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4517,15 +4517,19 @@ rs6000_option_override_internal (bool global_init_p)
 
       if ((rs6000_isa_flags_explicit & OPTION_MASK_XXSPLTIDP) == 0)
 	rs6000_isa_flags |= OPTION_MASK_XXSPLTIDP;
+    }
+  else
+    rs6000_isa_flags &= ~(OPTION_MASK_XXSPLTIW
+			  | OPTION_MASK_XXSPLTIDP
+			  | OPTION_MASK_XXSPLTI32DX);
 
+  if (TARGET_POWER10 && TARGET_FLOAT128_HW)
+    {
       if ((rs6000_isa_flags_explicit & OPTION_MASK_LXVKQ) == 0)
 	rs6000_isa_flags |= OPTION_MASK_LXVKQ;
     }
   else
-    rs6000_isa_flags &= ~(OPTION_MASK_LXVKQ
-			  | OPTION_MASK_XXSPLTIW
-			  | OPTION_MASK_XXSPLTIDP
-			  | OPTION_MASK_XXSPLTI32DX);
+    rs6000_isa_flags &= ~OPTION_MASK_LXVKQ;
 
   if (TARGET_DEBUG_REG || TARGET_DEBUG_TARGET)
     rs6000_print_isa_options (stderr, 0, "after subtarget", rs6000_isa_flags);