From: Bin Cheng <amker@gcc.gnu.org>
Date: Tue, 14 Feb 2012 06:57:17 +0000 (+0000)
Subject: backport: arm.c (arm_libcall_uses_aapcs_base): Use correct ABI for double-precision... 
X-Git-Tag: releases/gcc-4.6.3~88
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c27109d432f89bc3d262ac2a5e7347d2d318b7d1;p=thirdparty%2Fgcc.git

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


	Backport from mainline.
	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.

From-SVN: r184194
---

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 54b7603f3fc0..49c2a75bdbc5 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -3581,6 +3581,28 @@ 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;