Fix alpha-x-m32r-elf bugs.

	* cse.c (simplify_unary_operation): Sign-extend constants when
	they have the most significant bit set for the target.
	* real.c (endian): Sign-extend 32 bit output values on a 64 bit
	host.
	* m32r/m32r.c (m32r_expand_prologue): Store pretend_size in
	HOST_WIDE_INT temporary before negating it.
	* m32r/m32r.md (movsi_insn+1): Use ~0xffff instead of 0xffff0000.

From-SVN: r24254

1 files changed, 14 insertions, 0 deletions

diff --git a/gcc/real.c b/gcc/real.c
index 7261e29..8cc38cb 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -553,6 +553,20 @@ endian (e, x, mode)
 	  abort ();
 	}
     }
+
+  /* If 32 bits is an entire word for the target, but not for the host,
+     then sign-extend on the host so that the number will look the same
+     way on the host that it would on the target.  See for instance
+     simplify_unary_operation.  */
+
+  if (BITS_PER_WORD < HOST_BITS_PER_WIDE_INT && BITS_PER_WORD == 32)
+    {
+      if (x[0] & ((HOST_WIDE_INT) 1 << 31))
+	x[0] |= ((HOST_WIDE_INT) (-1) << 32);
+
+      if (x[1] & ((HOST_WIDE_INT) 1 << 31))
+	x[1] |= ((HOST_WIDE_INT) (-1) << 32);
+    }
 }