amdgcn: Support unordered floating-point comparison operators

2020-04-03  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/
	* config/gcn/gcn.c (print_operand): Handle unordered comparison
	operators.
	* config/gcn/predicates.md (gcn_fp_compare_operator): Add unordered
	comparison operators.

gcc/ChangeLog

+2020-04-03  Kwok Cheung Yeung  <kcy@codesourcery.com>
+
+	* config/gcn/gcn.c (print_operand): Handle unordered comparison
+	operators.
+	* config/gcn/predicates.md (gcn_fp_compare_operator): Add unordered
+	comparison operators.
+
 2020-04-03  Kewen Lin  <linkw@gcc.gnu.org>
 
 	PR tree-optimization/94443

gcc/config/gcn/gcn.c

@@ -6007,6 +6007,21 @@ print_operand (FILE *file, rtx x, int code)
 	  case UNORDERED:
 	    s = "_u_";
 	    break;
+	  case UNEQ:
+	    s = "_nlg_";
+	    break;
+	  case UNGE:
+	    s = "_nlt_";
+	    break;
+	  case UNGT:
+	    s = "_nle_";
+	    break;
+	  case UNLE:
+	    s = "_ngt_";
+	    break;
+	  case UNLT:
+	    s = "_nge_";
+	    break;
 	  case LTGT:
 	    s = "_lg_";
 	    break;

gcc/config/gcn/predicates.md

@@ -165,7 +165,7 @@
   (match_code "eq,ne,gt,ge,lt,le,gtu,geu,ltu,leu"))
 
 (define_predicate "gcn_fp_compare_operator"
-  (match_code "eq,ne,gt,ge,lt,le,gtu,geu,ltu,leu,ordered,unordered,ltgt"))
+  (match_code "eq,ne,gt,ge,lt,le,gtu,geu,ltu,leu,ordered,unordered,uneq,unge,ungt,unle,unlt,ltgt"))
 
 (define_predicate "unary_operator"
   (match_code "not,popcount"))