diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 216f807116a..196bcbe1ca3 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -17300,7 +17300,7 @@ output_toc (FILE *file, rtx x, int labelno, machine_mode mode)
       if (DECIMAL_FLOAT_MODE_P (GET_MODE (x)))
 	REAL_VALUE_TO_TARGET_DECIMAL128 (*CONST_DOUBLE_REAL_VALUE (x), k);
       else
-	REAL_VALUE_TO_TARGET_LONG_DOUBLE (*CONST_DOUBLE_REAL_VALUE (x), k);
+	real_to_target (k, CONST_DOUBLE_REAL_VALUE (x), GET_MODE (x));
 
       if (TARGET_64BIT)
 	{
diff --git a/gcc/testsuite/gcc.target/powerpc/pr110011.c b/gcc/testsuite/gcc.target/powerpc/pr110011.c
new file mode 100644
index 00000000000..5b04d3e298a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr110011.c
@@ -0,0 +1,42 @@
+/* { dg-do run } */
+/* { dg-require-effective-target float128_runtime } */
+/* Force long double to be with IBM format here, to verify
+   _Float128 constant still uses its own format (IEEE) for
+   encoding rather than IBM format.  */
+/* { dg-options "-mfp-in-toc -mabi=ibmlongdouble" } */
+/* { dg-add-options float128 } */
+
+#define MPFR_FLOAT128_MAX 0x1.ffffffffffffffffffffffffffffp+16383f128
+
+__attribute__ ((noipa))
+_Float128 f128_max ()
+{
+  return MPFR_FLOAT128_MAX;
+}
+
+typedef union
+{
+  int w[4];
+  _Float128 f128;
+} U;
+
+int main ()
+{
+
+  U umax;
+  umax.f128 = f128_max ();
+  /* ieee float128 max:
+     7ffeffff ffffffff ffffffff ffffffff.  */
+  if (umax.w[1] != 0xffffffff || umax.w[2] != 0xffffffff)
+    __builtin_abort ();
+#ifdef __LITTLE_ENDIAN__
+  if (umax.w[0] != 0xffffffff || umax.w[3] != 0x7ffeffff)
+    __builtin_abort ();
+#else
+  if (umax.w[3] != 0xffffffff || umax.w[0] != 0x7ffeffff)
+    __builtin_abort ();
+#endif
+
+  return 0;
+}
+