rtl.def: Add unordered fp comparisions.

        * rtl.def: Add unordered fp comparisions.
        * tree.def: Likewise.
	* tree.h: Add ISO C 9x unordered fp comparision builtins.

	* builtins.c (expand_tree_builtin): New function.
	* c-typeck.c (build_function_call): Use it.
	(build_binary_op): Support unordered compares.
	* c-common.c (c_common_nodes_and_builtins): Add unordered compares.

	* combine.c (known_cond): Handle reverse_condition returning UNKNOWN.
	(reversible_comparison_p): Allow UNORDERED/ORDERED to be reversed.
	* cse.c (fold_rtx): Check FLOAT_MODE_P before reversing.
	(record_jump_equiv): Handle reverse_condition returning UNKNOWN.
	* jump.c (reverse_condition): Don't abort for UNLE etc, but
	return UNKNOWN.
	(swap_condition): Handle unordered compares.
	(thread_jumps): Check can_reverse before reversing.
	* loop.c (get_condition): Likewise.  Allow UNORERED/ORDERED to be
	reversed for FP.

	* optabs.c (can_compare_p): New argument CODE.  Verify branch or
	setcc is present before acking for cmp_optab.  Update all callers.
	(prepare_float_lib_cmp, init_optabs): Handle UNORDERED.
	* expmed.c (do_cmp_and_jump): Update for can_compare_p.
	* expr.c (expand_expr): Likewise.  Support unordered compares.
	(do_jump, do_store_flag): Likewise.
	* expr.h (enum libfunc_index): Add unordered compares.

	* Makefile.in (FPBIT_FUNCS): Add _unord_sf.
	(DPBIT_FUNCS): Add _unord_df.
	* config/fp-bit.c (_unord_f2): New.
	* fp-test.c (main): Try unordered compare builtins.

	* alpha-protos.h (alpha_fp_comparison_operator): Declare.
	* alpha.c (alpha_comparison_operator): Check mode properly.
	(alpha_swapped_comparison_operator): Likewise.
	(signed_comparison_operator): Likewise.
	(alpha_fp_comparison_operator): New.
	(alpha_emit_conditional_branch): Handle unordered compares.
	* alpha.h (PREDICATE_CODES): Update.
	* alpha.md (fp compares): Use alpha_fp_comparison_operator.
	(bunordered, bordered): New.

	* cp/call.c (build_over_call): Use expand_tree_builtin.
	* cp/typeck.c (build_function_call_real): Likewise.
	(build_binary_op_nodefault): Handle unordered compares.

	* gcc.c-torture/execute/ieee/fp-cmp-4.c: New.

From-SVN: r31591

1 files changed, 23 insertions, 1 deletions

diff --git a/gcc/config/fp-bit.c b/gcc/config/fp-bit.c
index d7bc3de..fc496c0 100644
--- a/gcc/config/fp-bit.c
+++ b/gcc/config/fp-bit.c
@@ -1,7 +1,7 @@
 /* This is a software floating point library which can be used instead of
    the floating point routines in libgcc1.c for targets without hardware
    floating point. 
- Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1994-1998, 2000 Free Software Foundation, Inc.
 
 This file is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
@@ -78,6 +78,8 @@ Boston, MA 02111-1307, USA.  */
 #define L_lt_df
 #define L_le_sf
 #define L_le_df
+#define L_unord_sf
+#define L_unord_df
 #define L_si_to_sf
 #define L_si_to_df
 #define L_sf_to_si
@@ -268,6 +270,7 @@ typedef unsigned int UDItype __attribute__ ((mode (DI)));
 #		define _ge_f2 		__gesf2
 #		define _lt_f2 		__ltsf2
 #		define _le_f2 		__lesf2
+#		define _unord_f2	__unordsf2
 #		define si_to_float 	__floatsisf
 #		define float_to_si 	__fixsfsi
 #		define float_to_usi 	__fixunssfsi
@@ -285,6 +288,7 @@ typedef unsigned int UDItype __attribute__ ((mode (DI)));
 #		define _ge_f2 		__gedf2
 #		define _lt_f2 		__ltdf2
 #		define _le_f2 		__ledf2
+#		define _unord_f2	__unorddf2
 #		define si_to_float 	__floatsidf
 #		define float_to_si 	__fixdfsi
 #		define float_to_usi 	__fixunsdfsi
@@ -1370,6 +1374,24 @@ _le_f2 (FLO_type arg_a, FLO_type arg_b)
 }
 #endif
 
+#if defined(L_unord_sf) || defined(L_unord_df)
+CMPtype
+_unord_f2 (FLO_type arg_a, FLO_type arg_b)
+{
+  fp_number_type a;
+  fp_number_type b;
+  FLO_union_type au, bu;
+
+  au.value = arg_a;
+  bu.value = arg_b;
+
+  unpack_d (&au, &a);
+  unpack_d (&bu, &b);
+
+  return (isnan (&a) || isnan (&b);
+}
+#endif
+
 #endif /* ! US_SOFTWARE_GOFAST */
 
 #if defined(L_si_to_sf) || defined(L_si_to_df)