On 04/09/14 18:12, Richard Henderson wrote:
On 09/04/2014 07:04 AM, Ramana Radhakrishnan wrote:
gcc/Changelog
2014-09-04 Marcus Shawcroft <marcus.shawcr...@arm.com>
Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
* config/aarch64/aarch64-elf-raw.h (ENDFILE_SPEC): Add
crtfastmath.o.
* config/aarch64/aarch64-linux.h
(GNU_USER_TARGET_MATH_ENDFILE_SPEC): Define.
(ENDFILE_SPEC): Define and use GNU_USER_TARGET_MATH_ENDFILE_SPEC.
libgcc/Changelog
2014-09-04 Marcus Shawcroft <marcus.shawcr...@arm.com>
Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
* config.host (aarch64*): Include crtfastmath and t-crtfm.
* config/aarch64/crtfastmath.c: New file.
ENOPATCH.
r~
Bah - ofcourse.
Here it is attached.
Ramana
diff --git a/gcc/config/aarch64/aarch64-elf-raw.h
b/gcc/config/aarch64/aarch64-elf-raw.h
index adec7e7..b9d4e8d 100644
--- a/gcc/config/aarch64/aarch64-elf-raw.h
+++ b/gcc/config/aarch64/aarch64-elf-raw.h
@@ -23,7 +23,9 @@
#define GCC_AARCH64_ELF_RAW_H
#define STARTFILE_SPEC " crti%O%s crtbegin%O%s crt0%O%s"
-#define ENDFILE_SPEC " crtend%O%s crtn%O%s"
+#define ENDFILE_SPEC \
+ " crtend%O%s crtn%O%s " \
+ "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
#ifndef LINK_SPEC
#define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X \
diff --git a/gcc/config/aarch64/aarch64-linux.h
b/gcc/config/aarch64/aarch64-linux.h
index 8d20310..1731432 100644
--- a/gcc/config/aarch64/aarch64-linux.h
+++ b/gcc/config/aarch64/aarch64-linux.h
@@ -37,6 +37,14 @@
#define LINK_SPEC LINUX_TARGET_LINK_SPEC
+#define GNU_USER_TARGET_MATHFILE_SPEC \
+ "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+ GNU_USER_TARGET_MATHFILE_SPEC " " \
+ GNU_USER_TARGET_ENDFILE_SPEC
+
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
diff --git a/libgcc/config.host b/libgcc/config.host
index 0550c34..2ea8f20 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -322,13 +322,15 @@ esac
case ${host} in
aarch64*-*-elf)
extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o"
+ extra_parts="$extra_parts crtfastmath.o"
tmake_file="${tmake_file} ${cpu_type}/t-aarch64"
- tmake_file="${tmake_file} ${cpu_type}/t-softfp t-softfp"
+ tmake_file="${tmake_file} ${cpu_type}/t-softfp t-softfp t-crtfm"
;;
aarch64*-*-linux*)
+ extra_parts="$extra_parts crtfastmath.o"
md_unwind_header=aarch64/linux-unwind.h
tmake_file="${tmake_file} ${cpu_type}/t-aarch64"
- tmake_file="${tmake_file} ${cpu_type}/t-softfp t-softfp"
+ tmake_file="${tmake_file} ${cpu_type}/t-softfp t-softfp t-crtfm"
;;
alpha*-*-linux*)
tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee t-crtfm
alpha/t-linux"
diff --git a/libgcc/config/aarch64/crtfastmath.c
b/libgcc/config/aarch64/crtfastmath.c
new file mode 100644
index 0000000..3a8ddfc
--- /dev/null
+++ b/libgcc/config/aarch64/crtfastmath.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2014 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/>.
+ */
+
+#define _FPU_FPCR_FZ 0x1000000
+
+#define _FPU_SETCW(fpcr) \
+ { \
+ __asm__ __volatile__ ("msr fpcr, %0" : : "r" (fpcr)); \
+ }
+
+static void __attribute__((constructor))
+set_fast_math (void)
+{
+ /* Flush to zero, round to nearest, IEEE exceptions disabled. */
+ _FPU_SETCW (_FPU_FPCR_FZ);
+}
