crtfastmath.c: New file.

2002-04-03  David S. Miller  <davem@redhat.com>

	* config/sparc/crtfastmath.c: New file.
	* config/sparc/t-crtfm: New file.
	* config/sparc/linux.h (ENDFILE_SPEC): Use crtfastmath.o
	* config/sparc/linux64.h (ENDFILE_SPEC): Likewise.
	* config/sparc/sol2.h (ENDFILE_SPEC): Likewise.
	* config/sparc/sp64-elf.h (ENDFILE_SPEC): Likewise.
	* config/sparc/elf.h (ENDFILE_SPEC): Likewise.
	* config.gcc (sparc*-*-{elf*,linux*,solaris2*}): Add
	sparc/t-crtfm to tmake_file.

	* config/sparc/sparc-protos.h (sparc_emitting_epilogue): Add.

From-SVN: r51808

8 files changed, 83 insertions, 13 deletions

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 6ce8daa839d..818dfbe8c6a 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -3018,7 +3018,7 @@ sparc-*-chorusos*)
 	;;
 sparc-*-elf*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sol2.h sparc/elf.h"
-	tmake_file=sparc/t-elf
+	tmake_file="sparc/t-elf sparc/t-crtfm"
 	extra_parts="crti.o crtn.o crtbegin.o crtend.o"
 	#float_format=i128
 	float_format=i64
@@ -3029,14 +3029,14 @@ sparc-*-linux*aout*)		# Sparc's running GNU/Linux, a.out
 	;;
 sparc-*-linux*libc1*)	# Sparc's running GNU/Linux, libc5
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/linux.h"
-	tmake_file="t-slibgcc-elf-ver t-linux t-linux-gnulibc1"
+	tmake_file="t-slibgcc-elf-ver t-linux t-linux-gnulibc1 sparc/t-crtfm"
 	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
 	gnu_ld=yes
 	float_format=sparc
 	;;
 sparc-*-linux*)		# Sparc's running GNU/Linux, libc6
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/linux.h"
-	tmake_file="t-slibgcc-elf-ver t-linux"
+	tmake_file="t-slibgcc-elf-ver t-linux sparc/t-crtfm"
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	if test x$enable_threads = xyes; then
@@ -3080,7 +3080,7 @@ sparcv9-*-solaris2* | sparc64-*-solaris2*)
 		tm_file=sparc/sol2-sld-64.h
 	fi
 	xm_defines=POSIX
-	tmake_file="sparc/t-sol2 sparc/t-sol2-64"
+	tmake_file="sparc/t-sol2 sparc/t-sol2-64 sparc/t-crtfm"
 	if test x$gnu_ld = xyes; then
 		tmake_file="$tmake_file t-slibgcc-elf-ver"
 	else
@@ -3105,7 +3105,7 @@ sparcv9-*-solaris2* | sparc64-*-solaris2*)
 sparc-hal-solaris2*)
         xm_defines=POSIX
         tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sol2.h sparc/hal.h"
-        tmake_file="sparc/t-halos sparc/t-sol2"
+        tmake_file="sparc/t-halos sparc/t-sol2 sparc/t-crtfm"
 	if test x$gnu_ld = xyes; then
 		tmake_file="$tmake_file t-slibgcc-elf-ver"
 	else
@@ -3130,7 +3130,7 @@ sparc-*-solaris2*)
 		tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/sol2.h sparc/sol2-sld.h"
 	fi
 	xm_defines=POSIX
-	tmake_file=sparc/t-sol2
+	tmake_file="sparc/t-sol2 sparc/t-crtfm"
 	if test x$gnu_ld = xyes; then
 		tmake_file="$tmake_file t-slibgcc-elf-ver"
 	else
diff --git a/gcc/config/sparc/crtfastmath.c b/gcc/config/sparc/crtfastmath.c
new file mode 100644
index 00000000000..a0824a19733
--- /dev/null
+++ b/gcc/config/sparc/crtfastmath.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2001 Free Software Foundation, Inc.
+ * Contributed by David S. Miller (davem@redhat.com)
+ *
+ * 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 2, or (at your option) any
+ * later version.
+ * 
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ * 
+ * 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ *    As a special exception, if you link this library with files
+ *    compiled with GCC to produce an executable, this does not cause
+ *    the resulting executable to be covered by the GNU General Public License.
+ *    This exception does not however invalidate any other reasons why
+ *    the executable file might be covered by the GNU General Public License.
+ */
+
+#define FPRS_NS		(1 << 22)	/* Non-Standard fpu results */
+
+static void __attribute__((constructor))
+set_fast_math (void)
+{
+  unsigned long fsr;
+
+  /* This works for the 64-bit case because, even if 32-bit ld/st of
+     the fsr register modified the upper 32-bit, the only thing up there
+     are the 3 other condition codes which are "do not care" at the time
+     that this runs.  */
+
+  __asm__("st %%fsr, %0"
+	  : "=m" (fsr));
+
+  fsr |= FPRS_NS;
+
+  __asm__("ld %0, %%fsr"
+	  : : "m" (fsr));
+}
diff --git a/gcc/config/sparc/elf.h b/gcc/config/sparc/elf.h
index 20bea820951..d2d3a0b74d3 100644
--- a/gcc/config/sparc/elf.h
+++ b/gcc/config/sparc/elf.h
@@ -26,7 +26,9 @@ Boston, MA 02111-1307, USA.  */
 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
 
 #undef  ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+#define ENDFILE_SPEC \
+  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+   crtend.o%s crtn.o%s"
 
 /* Use the default.  */
 #undef LINK_SPEC
diff --git a/gcc/config/sparc/linux.h b/gcc/config/sparc/linux.h
index bc94de56020..1fb604e2a03 100644
--- a/gcc/config/sparc/linux.h
+++ b/gcc/config/sparc/linux.h
@@ -64,7 +64,8 @@ Boston, MA 02111-1307, USA.  */
 
 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC \
-  "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
+  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+   %{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
 
 /* This is for -profile to use -lc_p instead of -lc.  */
 #undef	CC1_SPEC
diff --git a/gcc/config/sparc/linux64.h b/gcc/config/sparc/linux64.h
index dee22e5f6fb..aa83342fc44 100644
--- a/gcc/config/sparc/linux64.h
+++ b/gcc/config/sparc/linux64.h
@@ -104,23 +104,28 @@ Boston, MA 02111-1307, USA.  */
 #define ENDFILE_SPEC64 \
   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s"
   
+#define ENDFILE_SPEC_COMMON \
+  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
+
 #ifdef SPARC_BI_ARCH
 
 #if DEFAULT_ARCH32_P
 #define ENDFILE_SPEC "\
 %{m32:" ENDFILE_SPEC32 "} \
 %{m64:" ENDFILE_SPEC64 "} \
-%{!m32:%{!m64:" ENDFILE_SPEC32 "}}"
+%{!m32:%{!m64:" ENDFILE_SPEC32 "}} " \
+ENDFILE_SPEC_COMMON
 #else
 #define ENDFILE_SPEC "\
 %{m32:" ENDFILE_SPEC32 "} \
 %{m64:" ENDFILE_SPEC64 "} \
-%{!m32:%{!m64:" ENDFILE_SPEC64 "}}"
+%{!m32:%{!m64:" ENDFILE_SPEC64 "}} " \
+ENDFILE_SPEC_COMMON
 #endif
 
 #else
 
-#define ENDFILE_SPEC ENDFILE_SPEC64
+#define ENDFILE_SPEC ENDFILE_SPEC64 " " ENDFILE_SPEC_COMMON
 
 #endif
 
diff --git a/gcc/config/sparc/sol2.h b/gcc/config/sparc/sol2.h
index 3541cace14c..305129b6b6e 100644
--- a/gcc/config/sparc/sol2.h
+++ b/gcc/config/sparc/sol2.h
@@ -160,7 +160,9 @@ Boston, MA 02111-1307, USA.  */
        %{p|pg:-ldl} -lc}}"
 
 #undef  ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+#define ENDFILE_SPEC \
+  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+   crtend.o%s crtn.o%s"
 
 /* This should be the same as in svr4.h, except with -R added.  */
 #undef LINK_SPEC
diff --git a/gcc/config/sparc/sp64-elf.h b/gcc/config/sparc/sp64-elf.h
index 2574c1ee423..caf944b33ff 100644
--- a/gcc/config/sparc/sp64-elf.h
+++ b/gcc/config/sparc/sp64-elf.h
@@ -71,7 +71,9 @@ crtbegin.o%s \
 "
 
 #undef ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend.o%s"
+#define ENDFILE_SPEC \
+  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+   crtend.o%s"
 
 /* Use the default (for now).  */
 #undef LIB_SPEC
diff --git a/gcc/config/sparc/t-crtfm b/gcc/config/sparc/t-crtfm
new file mode 100644
index 00000000000..744537db3bd
--- /dev/null
+++ b/gcc/config/sparc/t-crtfm
@@ -0,0 +1,4 @@
+EXTRA_PARTS += crtfastmath.o
+
+crtfastmath.o: $(srcdir)/config/sparc/crtfastmath.c $(GCC_PASSES)
+	$(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -c -o crtfastmath.o $(srcdir)/config/sparc/crtfastmath.c