SPDX-FileCopyrightText: 2023 Samuel Tyler <samuel@samuelt.me>
SPDX-FileCopyrightText: 2022 Christophe Lyon <christophe.lyon@arm.com>

SPDX-License-Identifier: GPL-3.0-or-later

In our context, some construct has decided that we don't support
XF mode (which is not true for the architecture, in general, as
this patch supports, but is sufficient for our strange environment).

Backport of commit 43ccb7e445329dd9557b42e7289a87a8071ab0f7.

[PATCH] libgcc: Enable XF mode conversions to/from DFP modes only if
 supported

Some targets do not support XF mode (eg AArch64), so don't build the
corresponding to/from DFP modes convertion routines if
__LIBGCC_HAS_XF_MODE__ is not defined.

diff --git libgcc/config/libbid/_dd_to_xf.c libgcc/config/libbid/_dd_to_xf.c
index 5a2abbbb1f4..e4b12e8ac4f 100644
--- gcc-10.5.0/libgcc/config/libbid/_dd_to_xf.c
+++ gcc-10.5.0/libgcc/config/libbid/_dd_to_xf.c
@@ -25,6 +25,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 XFtype
 __bid_extendddxf (_Decimal64 x) {
   XFtype res;
@@ -34,3 +35,4 @@ __bid_extendddxf (_Decimal64 x) {
   res = __bid64_to_binary80 (ux.i);
   return (res);
 }
+#endif
diff --git libgcc/config/libbid/_sd_to_xf.c libgcc/config/libbid/_sd_to_xf.c
index 9af09913684..288ccb25075 100644
--- gcc-10.5.0/libgcc/config/libbid/_sd_to_xf.c
+++ gcc-10.5.0/libgcc/config/libbid/_sd_to_xf.c
@@ -25,6 +25,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 XFtype
 __bid_extendsdxf (_Decimal32 x) {
   XFtype res;
@@ -34,3 +35,4 @@ __bid_extendsdxf (_Decimal32 x) {
   res = __bid32_to_binary80 (ux.i);
   return (res);
 }
+#endif
diff --git libgcc/config/libbid/_td_to_xf.c libgcc/config/libbid/_td_to_xf.c
index b0c76a71497..e990282162d 100644
--- gcc-10.5.0/libgcc/config/libbid/_td_to_xf.c
+++ gcc-10.5.0/libgcc/config/libbid/_td_to_xf.c
@@ -25,6 +25,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 XFtype
 __bid_trunctdxf (_Decimal128 x) {
   XFtype res;
@@ -34,3 +35,4 @@ __bid_trunctdxf (_Decimal128 x) {
   res = __bid128_to_binary80 (ux.i);
   return (res);
 }
+#endif
diff --git libgcc/config/libbid/_xf_to_dd.c libgcc/config/libbid/_xf_to_dd.c
index 9feb0f2c3d6..e3246a1c2e1 100644
--- gcc-10.5.0/libgcc/config/libbid/_xf_to_dd.c
+++ gcc-10.5.0/libgcc/config/libbid/_xf_to_dd.c
@@ -25,9 +25,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 _Decimal64
 __bid_truncxfdd (XFtype x) {
   union decimal64 res;
   res.i = __binary80_to_bid64 (x);
   return (res.d);
 }
+#endif
diff --git libgcc/config/libbid/_xf_to_sd.c libgcc/config/libbid/_xf_to_sd.c
index 7d46548af6c..9147e979182 100644
--- gcc-10.5.0/libgcc/config/libbid/_xf_to_sd.c
+++ gcc-10.5.0/libgcc/config/libbid/_xf_to_sd.c
@@ -25,9 +25,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 _Decimal32
 __bid_truncxfsd (XFtype x) {
   union decimal32 res;
   res.i = __binary80_to_bid32 (x);
   return (res.d);
 }
+#endif
diff --git libgcc/config/libbid/_xf_to_td.c libgcc/config/libbid/_xf_to_td.c
index 07987fdcc3a..c8d102b0b7f 100644
--- gcc-10.5.0/libgcc/config/libbid/_xf_to_td.c
+++ gcc-10.5.0/libgcc/config/libbid/_xf_to_td.c
@@ -25,9 +25,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "bid_functions.h"
 #include "bid_gcc_intrinsics.h"
 
+#ifdef __LIBGCC_HAS_XF_MODE__
 _Decimal128
 __bid_extendxftd (XFtype x) {
   union decimal128 res;
   res.i = __binary80_to_bid128 (x);
   return (res.d);
 }
+#endif
-- 
2.31.1

