[PATCH v2] rs6000: Change bitwise xor to an equality operator [PR106907]

[jeevitha]

Hi All,

The following patch has been bootstrapped and regtested on powerpc64le-linux.

PR106907 has a few warnings spotted from cppcheck. These warnings
are related to the need of precedence clarification. Instead of using xor,
it has been changed to equality check, which achieves the same result.
Additionally, comment indentation has been fixed.

2023-10-11  Jeevitha Palanisamy  <jeevi...@linux.ibm.com>

gcc/
        PR target/106907
        * config/rs6000/rs6000.cc (altivec_expand_vec_perm_const): Change 
bitwise
        xor to an equality and fix comment indentation.

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 2828f01413c..00191f8656b 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -23624,10 +23624,10 @@ altivec_expand_vec_perm_const (rtx target, rtx op0, 
rtx op1,
                      && GET_MODE (XEXP (op0, 0)) != V8HImode)))
            continue;
 
-          /* For little-endian, the two input operands must be swapped
-             (or swapped back) to ensure proper right-to-left numbering
-             from 0 to 2N-1.  */
-         if (swapped ^ !BYTES_BIG_ENDIAN
+         /* For little-endian, the two input operands must be swapped
+            (or swapped back) to ensure proper right-to-left numbering
+            from 0 to 2N-1.  */
+         if (swapped == BYTES_BIG_ENDIAN
              && icode != CODE_FOR_vsx_xxpermdi_v16qi)
            std::swap (op0, op1);
          if (imode != V16QImode)