* config/tc-mips.c (normalize_constant_expr): New function to fix sign

	extensions broken by gas' expression evaluation of constants.
	(check_absolute_expr): Use it.
	(mips_ip): Likewise.

1 files changed, 12 insertions, 0 deletions

diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index a7767659e4..c34197223e 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -3329,6 +3329,14 @@ set_at (int *counter, int reg, int unsignedp)
     }
 }
 
+static void
+normalize_constant_expr (expressionS *ex)
+{
+  if (ex->X_op == O_constant && HAVE_32BIT_GPRS)
+    ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000)
+			- 0x80000000);
+}
+
 /* Warn if an expression is not a constant.  */
 
 static void
@@ -3338,6 +3346,8 @@ check_absolute_expr (struct mips_cl_insn *ip, expressionS *ex)
     as_bad (_("unsupported large constant"));
   else if (ex->X_op != O_constant)
     as_bad (_("Instruction %s requires absolute expression"), ip->insn_mo->name);
+
+  normalize_constant_expr (ex);
 }
 
 /* Count the leading zeroes by performing a binary chop. This is a
@@ -8562,6 +8572,7 @@ do_msbd:
 		  if (imm2_expr.X_op != O_big
 		      && imm2_expr.X_op != O_constant)
 		  insn_error = _("absolute expression required");
+		  normalize_constant_expr (&imm2_expr);
 		  s = expr_end;
 		  continue;
 
@@ -9050,6 +9061,7 @@ do_msbd:
 	      if (imm_expr.X_op != O_big
 		  && imm_expr.X_op != O_constant)
 		insn_error = _("absolute expression required");
+	      normalize_constant_expr (&imm_expr);
 	      s = expr_end;
 	      continue;