Hello!
Attached patch defines _SOFT_FLOAT internal define for !TARGET_80387
for all x86 targets, similar to what RTEMS has been doing. This define
can be used to disable various parts af hardware FPU support in
libgcc, when -mno-80387 a.k.a. -soft-float is in effect. Please also
see the thread, starting at [1].
2013-11-03 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386-c.c (ix86_target_macros): Define _SOFT_FLOAT
for !TARGET_80387.
* config/i386/rtemself.h (TARGET_OS_CPP_BUILTINS): Do not define
_SOFT_FLOAT here.
Patch was bootstrapped and regression tested on x96_64-pc-linux-gnu {,-m32}.
I will wait a couple of days for possible comments.
[1] http://gcc.gnu.org/ml/gcc-help/2013-10/msg00002.html
Uros.
Index: config/i386/i386-c.c
===================================================================
--- config/i386/i386-c.c (revision 204324)
+++ config/i386/i386-c.c (working copy)
@@ -467,6 +467,9 @@ ix86_target_macros (void)
builtin_define_std ("i386");
}
+ if (!TARGET_80387)
+ cpp_define (parse_in, "_SOFT_FLOAT");
+
if (TARGET_LONG_DOUBLE_64)
cpp_define (parse_in, "__LONG_DOUBLE_64__");
Index: config/i386/rtemself.h
===================================================================
--- config/i386/rtemself.h (revision 204324)
+++ config/i386/rtemself.h (working copy)
@@ -26,7 +26,5 @@ along with GCC; see the file COPYING3. If not see
builtin_define ("__rtems__"); \
builtin_define ("__USE_INIT_FINI__"); \
builtin_assert ("system=rtems"); \
- if (!TARGET_80387) \
- builtin_define ("_SOFT_FLOAT"); \
} \
while (0)
