gcc:

	* config/i386/crtprec.c: Move to ../libgcc/config/i386.
	* config/i386/t-crtpc: Remove.
	* config/t-darwin (EXTRA_MULTILIB_PARTS): Remove.
	* config.gcc (i[34567]86-*-darwin*): Remove i386/t-crtpc from
	tmake_file.
	(x86_64-*-darwin*): Likewise.
	(i[34567]86-*-linux*): Likewise.
	(x86_64-*-linux*): Likewise.

	* config/i386/sol2.h (ENDFILE_SPEC): Redefine.
	Handle -mpc32, -mpc64, -mpc80.

	libgcc:
	* config/i386/crtprec.c: New file.
	* config/i386/t-crtpc: Use $(srcdir) to refer to crtprec.c.
	* config.host (i[34567]86-*-darwin*): Add i386/t-crtpc to tmake_file.
	Add crtprec32.o, crtprec64.o, crtprec80.o to extra_parts.
	(x86_64-*-darwin*): Likewise.
	(i[34567]86-*-solaris2*: Likewise.

	gcc/testsuite:
	* gcc.c-torture/execute/990127-2.x: Use -mpc64 on i?86-*-darwin*,
	i?86-*-solaris2*, x86_64-*-darwin*, x86_64-*-solaris2*.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@176242 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 50 insertions, 3 deletions

diff --git a/libgcc/config/i386/crtprec.c b/libgcc/config/i386/crtprec.c
new file mode 100644
index 00000000000..4f42a8fa1c1
--- /dev/null
+++ b/libgcc/config/i386/crtprec.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2007, 2009 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
+ * Free Software Foundation; either version 3, or (at your option) any
+ * later version.
+ * 
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#if __PREC == 32
+ #define X87CW		(0 << 8)	/* Single precision (24 bits) */
+#elif __PREC == 64
+ #define X87CW		(2 << 8)	/* Double precision (53 bits) */
+#elif __PREC == 80
+ #define X87CW		(3 << 8)	/* Extended precision (64 bits) */
+#else
+ #error "Wrong precision requested."
+#endif
+
+#define X87CW_PCMASK	(3 << 8)
+
+static void __attribute__((constructor))
+set_precision (void)
+{
+  unsigned short int cwd;
+
+  asm volatile ("fstcw\t%0" : "=m" (cwd));
+
+  cwd &= ~X87CW_PCMASK;
+  cwd |= X87CW;
+
+  asm volatile ("fldcw\t%0" : : "m" (cwd));
+}
diff --git a/libgcc/config/i386/t-crtpc b/libgcc/config/i386/t-crtpc
index c231ce195f2..b605f6f7930 100644
--- a/libgcc/config/i386/t-crtpc
+++ b/libgcc/config/i386/t-crtpc
@@ -1,8 +1,8 @@
-crtprec32.o: $(gcc_srcdir)/config/i386/crtprec.c
+crtprec32.o: $(srcdir)/config/i386/crtprec.c
 	$(gcc_compile) -D__PREC=32 -c $<
 
-crtprec64.o: $(gcc_srcdir)/config/i386/crtprec.c
+crtprec64.o: $(srcdir)/config/i386/crtprec.c
 	$(gcc_compile) -D__PREC=64 -c $<
 
-crtprec80.o: $(gcc_srcdir)/config/i386/crtprec.c
+crtprec80.o: $(srcdir)/config/i386/crtprec.c
 	$(gcc_compile) -D__PREC=80 -c $<