[gcc r13-3098] rs6000: Remove "wD" from *vsx_extract_<mode>_store

[gcc r13-3098] rs6000: Remove "wD" from *vsx_extract_<mode>_store

[Segher Boessenkool]

https://gcc.gnu.org/g:c3d131531a23c71e09c032d6222d0b5ff0eb8162

commit r13-3098-gc3d131531a23c71e09c032d6222d0b5ff0eb8162
Author: Segher Boessenkool <segher@kernel.crashing.org>
Date:   Mon Oct 3 22:43:48 2022 +0000

    rs6000: Remove "wD" from *vsx_extract_<mode>_store
    
    We can use "n" instead of "wD" if we simply test the value of the
    integer constant directly.
    
    2022-10-05  Segher Boessenkool  <segher@kernel.crashing.org>
    
            * config/rs6000/vsx.md (*vsx_extract_<mode>_store): Use "n" instead of
            "wD" constraint.

Diff:
---
 gcc/config/rs6000/vsx.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index e226a93bbe5..79a759b1ccf 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -3466,8 +3466,9 @@
   [(set (match_operand:<VEC_base> 0 "memory_operand" "=m,Z,wY")
 	(vec_select:<VEC_base>
 	 (match_operand:VSX_D 1 "register_operand" "d,v,v")
-	 (parallel [(match_operand:QI 2 "vsx_scalar_64bit" "wD,wD,wD")])))]
-  "VECTOR_MEM_VSX_P (<MODE>mode)"
+	 (parallel [(match_operand:QI 2 "vsx_scalar_64bit" "n,n,n")])))]
+  "VECTOR_MEM_VSX_P (<MODE>mode)
+   && INTVAL (operands[2]) == (BYTES_BIG_ENDIAN ? 0 : 1)"
   "@
    stfd%U0%X0 %1,%0
    stxsdx %x1,%y0