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authorJoseph Myers <joseph@codesourcery.com>2018-05-09 19:45:47 +0000
committerJoseph Myers <joseph@codesourcery.com>2018-05-09 19:45:47 +0000
commit9ed2e15ff4c9ff27c09103fa13a051e3605cbe5f (patch)
tree13e340bb8033848e46f825ee0489717436579b57 /sysdeps/alpha/fpu
parent5460617d1567657621107d895ee2dd83bc1f88f2 (diff)
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Move math_opt_barrier, math_force_eval to separate math-barriers.h.
This patch continues cleaning up math_private.h by moving the math_opt_barrier and math_force_eval macros to a separate header math-barriers.h. At present, those macros are inside a "#ifndef math_opt_barrier" in math_private.h to allow architectures to override them and then use a separate math-barriers.h header, no such #ifndef or #include_next is needed; architectures just have their own alternative version of math-barriers.h when providing their own optimized versions that avoid going through memory unnecessarily. The generic math-barriers.h has a comment added to document these two macros. In this patch, math_private.h is made to #include <math-barriers.h>, so files using these macros do not need updating yet. That is because of uses of math_force_eval in math_check_force_underflow and math_check_force_underflow_nonneg, which are still defined in math_private.h. Once those are moved out to a separate header, that separate header can be made to include <math-barriers.h>, as can the other files directly using these barrier macros, and then the include of <math-barriers.h> from math_private.h can be removed. Tested for x86_64 and x86. Also tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * sysdeps/generic/math-barriers.h: New file. * sysdeps/generic/math_private.h [!math_opt_barrier] (math_opt_barrier): Move to math-barriers.h. [!math_opt_barrier] (math_force_eval): Likewise. * sysdeps/aarch64/fpu/math-barriers.h: New file. * sysdeps/aarch64/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/alpha/fpu/math-barriers.h: New file. * sysdeps/alpha/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/x86/fpu/math-barriers.h: New file. * sysdeps/i386/fpu/fenv_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/m68k/m680x0/fpu/math_private.h: Move to.... * sysdeps/m68k/m680x0/fpu/math-barriers.h: ... here. Adjust multiple-include guard for rename. * sysdeps/powerpc/fpu/math-barriers.h: New file. * sysdeps/powerpc/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise.
Diffstat (limited to 'sysdeps/alpha/fpu')
-rw-r--r--sysdeps/alpha/fpu/math-barriers.h28
-rw-r--r--sysdeps/alpha/fpu/math_private.h6
2 files changed, 28 insertions, 6 deletions
diff --git a/sysdeps/alpha/fpu/math-barriers.h b/sysdeps/alpha/fpu/math-barriers.h
new file mode 100644
index 0000000000..27a64d789d
--- /dev/null
+++ b/sysdeps/alpha/fpu/math-barriers.h
@@ -0,0 +1,28 @@
+/* Control when floating-point expressions are evaluated. Alpha version.
+ Copyright (C) 2014-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef ALPHA_MATH_BARRIERS_H
+#define ALPHA_MATH_BARRIERS_H 1
+
+/* Generic code forces values to memory; we don't need to do that. */
+#define math_opt_barrier(x) \
+ ({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; })
+#define math_force_eval(x) \
+ ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); })
+
+#endif
diff --git a/sysdeps/alpha/fpu/math_private.h b/sysdeps/alpha/fpu/math_private.h
index 95dc32c969..c71447abf0 100644
--- a/sysdeps/alpha/fpu/math_private.h
+++ b/sysdeps/alpha/fpu/math_private.h
@@ -13,12 +13,6 @@
# define __isnanf __isnanf
#endif
-/* Generic code forces values to memory; we don't need to do that. */
-#define math_opt_barrier(x) \
- ({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; })
-#define math_force_eval(x) \
- ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); })
-
#include_next <math_private.h>
#endif /* ALPHA_MATH_PRIVATE_H */