[PATCHv2 6/7] gcc/arc: Mask integer 'L' operands to 32-bit

[Andrew Burgess]

When formatting 'L' operands (least significant word) only print
32-bits, don't sign extend to 64-bits.

This commit could really be applied directly to the current GCC trunk,
however, the only test I have for this issue right now relies on the
nps400 bitops support.

gcc/ChangeLog:

        * config/arc/arc.c (arc_print_operand): Print integer 'L' operands
        as 32-bits.

gcc/testsuite/ChangeLog:

        * gcc.target/arc/movh_cl-1.c: New file.
---
 gcc/ChangeLog.NPS400                     |  6 ++++++
 gcc/config/arc/arc.c                     | 10 ++++------
 gcc/testsuite/ChangeLog.NPS400           |  4 ++++
 gcc/testsuite/gcc.target/arc/movh_cl-1.c | 27 +++++++++++++++++++++++++++
 4 files changed, 41 insertions(+), 6 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/arc/movh_cl-1.c

diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 72a0825..b7b8516 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -3181,18 +3181,16 @@ arc_print_operand (FILE *file, rtx x, int code)
       else if (GET_CODE (x) == CONST_INT
               || GET_CODE (x) == CONST_DOUBLE)
        {
-         rtx first, second;
+         rtx first, second, word;
 
          split_double (x, &first, &second);
 
          if((WORDS_BIG_ENDIAN) == 0)
-             fprintf (file, "0x%08" PRIx64,
-                      code == 'L' ? INTVAL (first) : INTVAL (second));
+           word = (code == 'L' ? first : second);
          else
-             fprintf (file, "0x%08" PRIx64,
-                      code == 'L' ? INTVAL (second) : INTVAL (first));
-
+           word = (code == 'L' ? second : first);
 
+         fprintf (file, "0x%08" PRIx32, ((uint32_t) INTVAL (word)));
          }
       else
        output_operand_lossage ("invalid operand to %%H/%%L code");
diff --git a/gcc/testsuite/gcc.target/arc/movh_cl-1.c 
b/gcc/testsuite/gcc.target/arc/movh_cl-1.c
new file mode 100644
index 0000000..220cd9d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arc/movh_cl-1.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-mcpu=nps400 -O2 -mbitops" } */
+
+struct thing
+{
+  union
+  {
+    int raw;
+    struct
+    {
+      unsigned a : 1;
+      unsigned b : 1;
+    };
+  };
+};
+
+extern void func (int);
+
+void
+blah ()
+{
+  struct thing xx;
+  xx.a = xx.b = 1;
+  func (xx.raw);
+}
+
+/* { dg-final { scan-assembler "movh\.cl r\[0-9\]+,0xc0000000>>16" } } */
-- 
2.6.4