re PR bootstrap/77993 (bootstrap failure on PowerPC/Linux)

2016-11-03  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/77993
	* config/rs6000/rs6000.h (FLOAT128_IBM_P): Do not allow IFmode or
	ICmode unless we have standard PowerPC floating point.
	* config/rs6000/rs6000.md (FP iterator): Likewise.
	(FMOVE128 iterator): Likewise.

From-SVN: r241833

gcc/ChangeLog

+2016-11-03  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/77993
+	* config/rs6000/rs6000.h (FLOAT128_IBM_P): Do not allow IFmode or
+	ICmode unless we have standard PowerPC floating point.
+	* config/rs6000/rs6000.md (FP iterator): Likewise.
+	(FMOVE128 iterator): Likewise.
+
 2016-11-03  Jakub Jelinek  <jakub@redhat.com>
 	    Alexandre Oliva  <aoliva@redhat.com>
 	    Jason Merrill  <jason@redhat.com>

gcc/config/rs6000/rs6000.h

@@ -442,14 +442,15 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
    point.  KFmode was added as a way to represent IEEE 128-bit floating point,
    even if the default for long double is the IBM long double format.
    Similarly IFmode is the IBM long double format even if the default is IEEE
-   128-bit.  */
+   128-bit.  Don't allow IFmode if -msoft-float.  */
 #define FLOAT128_IEEE_P(MODE)						\
   ((TARGET_IEEEQUAD && ((MODE) == TFmode || (MODE) == TCmode))		\
    || ((MODE) == KFmode) || ((MODE) == KCmode))
 
 #define FLOAT128_IBM_P(MODE)						\
   ((!TARGET_IEEEQUAD && ((MODE) == TFmode || (MODE) == TCmode))		\
-   || ((MODE) == IFmode) || ((MODE) == ICmode))
+   || (TARGET_HARD_FLOAT && TARGET_FPRS					\
+       && ((MODE) == IFmode) || ((MODE) == ICmode)))
 
 /* Helper macros to say whether a 128-bit floating point type can go in a
    single vector register, or whether it needs paired scalar values.  */

gcc/config/rs6000/rs6000.md

@@ -376,7 +376,7 @@
   (TF "TARGET_HARD_FLOAT
    && (TARGET_FPRS || TARGET_E500_DOUBLE)
    && TARGET_LONG_DOUBLE_128")
-  (IF "TARGET_LONG_DOUBLE_128")
+  (IF "TARGET_HARD_FLOAT && TARGET_FPRS && TARGET_LONG_DOUBLE_128")
   (KF "TARGET_FLOAT128_TYPE")
   (DD "TARGET_DFP")
   (TD "TARGET_DFP")])
@@ -398,7 +398,7 @@
 (define_mode_iterator FMOVE64 [DF DD])
 (define_mode_iterator FMOVE64X [DI DF DD])
 (define_mode_iterator FMOVE128 [(TF "TARGET_LONG_DOUBLE_128")
-				(IF "TARGET_LONG_DOUBLE_128")
+				(IF "FLOAT128_IBM_P (IFmode)")
 				(TD "TARGET_HARD_FLOAT && TARGET_FPRS")])
 
 (define_mode_iterator FMOVE128_FPR [(TF "FLOAT128_2REG_P (TFmode)")