[PATCH 2/3]rs6000: using 'pli' to load 34bit-constant

[Jiufu Guo]

Hi,

For constants with 16bit values, 'li or lis' can be used to generate
the value.  For 34bit constant, 'pli' is ok to generate the value.

Bootstrap&regtest pass on ppc64{,le}.
Is this ok for trunk?

BR,
Jeff (Jiufu Guo)

gcc/ChangeLog:

        * config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Add code to use
        pli for 34bit constant.

---
 gcc/config/rs6000/rs6000.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index b23ff3d7917..4690384cdbe 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -10530,7 +10530,11 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c)
   ud3 = (c >> 32) & 0xffff;
   ud4 = (c >> 48) & 0xffff;
 
-  if ((ud4 == 0xffff && ud3 == 0xffff && ud2 == 0xffff && (ud1 & 0x8000))
+  if (TARGET_PREFIXED && SIGNED_INTEGER_34BIT_P (c))
+    {
+      emit_move_insn (dest, GEN_INT (c));
+    }
+  else if ((ud4 == 0xffff && ud3 == 0xffff && ud2 == 0xffff && (ud1 & 0x8000))
       || (ud4 == 0 && ud3 == 0 && ud2 == 0 && ! (ud1 & 0x8000)))
     emit_move_insn (dest, GEN_INT (sext_hwi (ud1, 16)));
 
-- 
2.25.1