arm.c (arm_libcall_uses_aapcs_base): Use correct ABI for double-precision helper…

arm.c (arm_libcall_uses_aapcs_base): Use correct ABI for double-precision helper functions in hard-float mode if...

	* config/arm/arm.c (arm_libcall_uses_aapcs_base): Use correct ABI
	for double-precision helper functions in hard-float mode if only
	single-precision arithmetic is supported in hardware.

From-SVN: r174803

gcc/ChangeLog

+2011-06-08  Julian Brown  <julian@codesourcery.com>
+
+	* config/arm/arm.c (arm_libcall_uses_aapcs_base): Use correct ABI
+	for double-precision helper functions in hard-float mode if only
+	single-precision arithmetic is supported in hardware.
+
 2011-06-08  Alexander Monakov  <amonakov@ispras.ru>
 
 	PR rtl-optimization/49303

gcc/config/arm/arm.c

@@ -3345,6 +3345,28 @@ arm_libcall_uses_aapcs_base (const_rtx libcall)
 		   convert_optab_libfunc (sfix_optab, DImode, SFmode));
       add_libcall (libcall_htab,
 		   convert_optab_libfunc (ufix_optab, DImode, SFmode));
+
+      /* Values from double-precision helper functions are returned in core
+	 registers if the selected core only supports single-precision
+	 arithmetic, even if we are using the hard-float ABI.  The same is
+	 true for single-precision helpers, but we will never be using the
+	 hard-float ABI on a CPU which doesn't support single-precision
+	 operations in hardware.  */
+      add_libcall (libcall_htab, optab_libfunc (add_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (sdiv_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (smul_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (neg_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (sub_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (eq_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (lt_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (le_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (ge_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (gt_optab, DFmode));
+      add_libcall (libcall_htab, optab_libfunc (unord_optab, DFmode));
+      add_libcall (libcall_htab, convert_optab_libfunc (sext_optab, DFmode,
+							SFmode));
+      add_libcall (libcall_htab, convert_optab_libfunc (trunc_optab, SFmode,
+							DFmode));
     }
 
   return libcall && htab_find (libcall_htab, libcall) != NULL;