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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.
This commit is contained in:
Joseph Myers
26
ChangeLog
26
ChangeLog
@ -1,3 +1,29 @@
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2018-05-09 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/generic/math-barriers.h: New file.
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* sysdeps/generic/math_private.h [!math_opt_barrier]
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(math_opt_barrier): Move to math-barriers.h.
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[!math_opt_barrier] (math_force_eval): Likewise.
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* sysdeps/aarch64/fpu/math-barriers.h: New file.
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* sysdeps/aarch64/fpu/math_private.h (math_opt_barrier): Move to
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math-barriers.h.
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(math_force_eval): Likewise.
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* sysdeps/alpha/fpu/math-barriers.h: New file.
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* sysdeps/alpha/fpu/math_private.h (math_opt_barrier): Move to
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math-barriers.h.
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(math_force_eval): Likewise.
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* sysdeps/x86/fpu/math-barriers.h: New file.
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* sysdeps/i386/fpu/fenv_private.h (math_opt_barrier): Move to
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math-barriers.h.
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(math_force_eval): Likewise.
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* sysdeps/m68k/m680x0/fpu/math_private.h: Move to....
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* sysdeps/m68k/m680x0/fpu/math-barriers.h: ... here. Adjust
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multiple-include guard for rename.
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* sysdeps/powerpc/fpu/math-barriers.h: New file.
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* sysdeps/powerpc/fpu/math_private.h (math_opt_barrier): Move to
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math-barriers.h.
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(math_force_eval): Likewise.
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2018-05-09 Paul Pluzhnikov <ppluzhnikov@google.com>
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2018-05-09 Paul Pluzhnikov <ppluzhnikov@google.com>
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[BZ #22786]
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[BZ #22786]
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27
sysdeps/aarch64/fpu/math-barriers.h
Normal file
27
sysdeps/aarch64/fpu/math-barriers.h
Normal file
@ -0,0 +1,27 @@
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/* Control when floating-point expressions are evaluated. AArch64 version.
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Copyright (C) 2014-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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|
License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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|
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef AARCH64_MATH_BARRIERS_H
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#define AARCH64_MATH_BARRIERS_H 1
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#define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; })
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#define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "w" (__x)); })
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#endif
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@ -22,11 +22,6 @@
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#include <fenv.h>
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#include <fenv.h>
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#include <fpu_control.h>
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#include <fpu_control.h>
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#define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; })
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#define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "w" (__x)); })
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static __always_inline void
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static __always_inline void
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libc_feholdexcept_aarch64 (fenv_t *envp)
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libc_feholdexcept_aarch64 (fenv_t *envp)
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{
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{
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28
sysdeps/alpha/fpu/math-barriers.h
Normal file
28
sysdeps/alpha/fpu/math-barriers.h
Normal file
@ -0,0 +1,28 @@
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/* Control when floating-point expressions are evaluated. Alpha version.
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Copyright (C) 2014-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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|
modify it under the terms of the GNU Lesser General Public
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|
License as published by the Free Software Foundation; either
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|
version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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|
Lesser General Public License for more details.
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|
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You should have received a copy of the GNU Lesser General Public
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|
License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef ALPHA_MATH_BARRIERS_H
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#define ALPHA_MATH_BARRIERS_H 1
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/* Generic code forces values to memory; we don't need to do that. */
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#define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; })
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#define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); })
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#endif
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@ -13,12 +13,6 @@
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# define __isnanf __isnanf
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# define __isnanf __isnanf
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#endif
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#endif
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/* Generic code forces values to memory; we don't need to do that. */
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#define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; })
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#define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); })
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#include_next <math_private.h>
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#include_next <math_private.h>
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#endif /* ALPHA_MATH_PRIVATE_H */
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#endif /* ALPHA_MATH_PRIVATE_H */
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37
sysdeps/generic/math-barriers.h
Normal file
37
sysdeps/generic/math-barriers.h
Normal file
@ -0,0 +1,37 @@
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/* Control when floating-point expressions are evaluated. Generic version.
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Copyright (C) 2007-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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|
modify it under the terms of the GNU Lesser General Public
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|
License as published by the Free Software Foundation; either
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|
version 2.1 of the License, or (at your option) any later version.
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|
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|
The GNU C Library is distributed in the hope that it will be useful,
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|
but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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|
Lesser General Public License for more details.
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|
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|
You should have received a copy of the GNU Lesser General Public
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|
License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_BARRIERS_H
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#define _MATH_BARRIERS_H 1
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/* math_opt_barrier evaluates and returns its floating-point argument
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and ensures that the evaluation of any expression using the result
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of math_opt_barrier is not moved before the call. math_force_eval
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ensures that its floating-point argument is evaluated for its side
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effects even if its value is apparently unused, and that the
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evaluation of its argument is not moved after the call. Both these
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macros are used to ensure the correct ordering of floating-point
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expression evaluations with respect to accesses to the
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floating-point environment. */
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#define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+m" (__x)); __x; })
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#define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "m" (__x)); })
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#endif /* math-barriers.h */
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@ -263,12 +263,7 @@ extern double __mpsin (double __x, double __dx, bool __range_reduce);
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extern double __mpcos (double __x, double __dx, bool __range_reduce);
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extern double __mpcos (double __x, double __dx, bool __range_reduce);
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extern void __docos (double __x, double __dx, double __v[]);
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extern void __docos (double __x, double __dx, double __v[]);
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#ifndef math_opt_barrier
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#include <math-barriers.h>
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# define math_opt_barrier(x) \
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({ __typeof (x) __x = (x); __asm ("" : "+m" (__x)); __x; })
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# define math_force_eval(x) \
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({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "m" (__x)); })
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#endif
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#define fabs_tg(x) __MATH_TG ((x), (__typeof (x)) __builtin_fabs, (x))
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#define fabs_tg(x) __MATH_TG ((x), (__typeof (x)) __builtin_fabs, (x))
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@ -5,45 +5,6 @@
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#include <fenv.h>
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#include <fenv.h>
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#include <fpu_control.h>
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#include <fpu_control.h>
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#ifdef __SSE2_MATH__
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# define math_opt_barrier(x) \
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({ __typeof(x) __x; \
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if (sizeof (x) <= sizeof (double) \
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|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
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__asm ("" : "=x" (__x) : "0" (x)); \
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else \
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__asm ("" : "=t" (__x) : "0" (x)); \
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__x; })
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# define math_force_eval(x) \
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do { \
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if (sizeof (x) <= sizeof (double) \
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|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
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__asm __volatile ("" : : "x" (x)); \
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else \
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__asm __volatile ("" : : "f" (x)); \
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} while (0)
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#else
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# define math_opt_barrier(x) \
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({ __typeof (x) __x; \
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if (__builtin_types_compatible_p (__typeof (x), _Float128)) \
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{ \
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__x = (x); \
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__asm ("" : "+m" (__x)); \
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} \
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else \
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__asm ("" : "=t" (__x) : "0" (x)); \
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__x; })
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# define math_force_eval(x) \
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do { \
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__typeof (x) __x = (x); \
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if (sizeof (x) <= sizeof (double) \
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|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
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__asm __volatile ("" : : "m" (__x)); \
|
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else \
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__asm __volatile ("" : : "f" (__x)); \
|
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} while (0)
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#endif
|
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|
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/* This file is used by both the 32- and 64-bit ports. The 64-bit port
|
/* This file is used by both the 32- and 64-bit ports. The 64-bit port
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has a field in the fenv_t for the mxcsr; the 32-bit port does not.
|
has a field in the fenv_t for the mxcsr; the 32-bit port does not.
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Instead, we (ab)use the only 32-bit field extant in the struct. */
|
Instead, we (ab)use the only 32-bit field extant in the struct. */
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37
sysdeps/m68k/m680x0/fpu/math-barriers.h
Normal file
37
sysdeps/m68k/m680x0/fpu/math-barriers.h
Normal file
@ -0,0 +1,37 @@
|
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|
/* Control when floating-point expressions are evaluated. M68k version.
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|
Copyright (C) 2011-2018 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 M68K_MATH_BARRIERS_H
|
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|
#define M68K_MATH_BARRIERS_H 1
|
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|
|
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|
#define math_opt_barrier(x) \
|
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|
({ __typeof (x) __x; \
|
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|
__asm ("" : "=f" (__x) : "0" (x)); \
|
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|
__x; })
|
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|
#define math_force_eval(x) \
|
||||||
|
do \
|
||||||
|
{ \
|
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|
__typeof (x) __x = (x); \
|
||||||
|
if (sizeof (x) <= sizeof (double)) \
|
||||||
|
__asm __volatile ("" : : "m" (__x)); \
|
||||||
|
else \
|
||||||
|
__asm __volatile ("" : : "f" (__x)); \
|
||||||
|
} \
|
||||||
|
while (0)
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||||||
|
|
||||||
|
#endif
|
||||||
@ -1,20 +0,0 @@
|
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#ifndef M68K_MATH_PRIVATE_H
|
|
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#define M68K_MATH_PRIVATE_H 1
|
|
||||||
|
|
||||||
#define math_opt_barrier(x) \
|
|
||||||
({ __typeof (x) __x; \
|
|
||||||
__asm ("" : "=f" (__x) : "0" (x)); \
|
|
||||||
__x; })
|
|
||||||
#define math_force_eval(x) \
|
|
||||||
do \
|
|
||||||
{ \
|
|
||||||
__typeof (x) __x = (x); \
|
|
||||||
if (sizeof (x) <= sizeof (double)) \
|
|
||||||
__asm __volatile ("" : : "m" (__x)); \
|
|
||||||
else \
|
|
||||||
__asm __volatile ("" : : "f" (__x)); \
|
|
||||||
} \
|
|
||||||
while (0)
|
|
||||||
|
|
||||||
#include_next <math_private.h>
|
|
||||||
#endif
|
|
||||||
28
sysdeps/powerpc/fpu/math-barriers.h
Normal file
28
sysdeps/powerpc/fpu/math-barriers.h
Normal file
@ -0,0 +1,28 @@
|
|||||||
|
/* Control when floating-point expressions are evaluated. PowerPC version.
|
||||||
|
Copyright (C) 2017-2018 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 POWERPC_MATH_BARRIERS_H
|
||||||
|
#define POWERPC_MATH_BARRIERS_H 1
|
||||||
|
|
||||||
|
/* Avoid putting floating point values in memory. */
|
||||||
|
# define math_opt_barrier(x) \
|
||||||
|
({ __typeof (x) __x = (x); __asm ("" : "+dwa" (__x)); __x; })
|
||||||
|
# define math_force_eval(x) \
|
||||||
|
({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "dwa" (__x)); })
|
||||||
|
|
||||||
|
#endif
|
||||||
@ -24,12 +24,6 @@
|
|||||||
#include <dl-procinfo.h>
|
#include <dl-procinfo.h>
|
||||||
#include <fenv_private.h>
|
#include <fenv_private.h>
|
||||||
|
|
||||||
/* Avoid putting floating point values in memory. */
|
|
||||||
# define math_opt_barrier(x) \
|
|
||||||
({ __typeof (x) __x = (x); __asm ("" : "+dwa" (__x)); __x; })
|
|
||||||
# define math_force_eval(x) \
|
|
||||||
({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "dwa" (__x)); })
|
|
||||||
|
|
||||||
#include_next <math_private.h>
|
#include_next <math_private.h>
|
||||||
|
|
||||||
#if defined _ARCH_PWR9 && __HAVE_DISTINCT_FLOAT128
|
#if defined _ARCH_PWR9 && __HAVE_DISTINCT_FLOAT128
|
||||||
|
|||||||
61
sysdeps/x86/fpu/math-barriers.h
Normal file
61
sysdeps/x86/fpu/math-barriers.h
Normal file
@ -0,0 +1,61 @@
|
|||||||
|
/* Control when floating-point expressions are evaluated. x86 version.
|
||||||
|
Copyright (C) 2007-2018 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 X86_MATH_BARRIERS_H
|
||||||
|
#define X86_MATH_BARRIERS_H 1
|
||||||
|
|
||||||
|
#ifdef __SSE2_MATH__
|
||||||
|
# define math_opt_barrier(x) \
|
||||||
|
({ __typeof(x) __x; \
|
||||||
|
if (sizeof (x) <= sizeof (double) \
|
||||||
|
|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
|
||||||
|
__asm ("" : "=x" (__x) : "0" (x)); \
|
||||||
|
else \
|
||||||
|
__asm ("" : "=t" (__x) : "0" (x)); \
|
||||||
|
__x; })
|
||||||
|
# define math_force_eval(x) \
|
||||||
|
do { \
|
||||||
|
if (sizeof (x) <= sizeof (double) \
|
||||||
|
|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
|
||||||
|
__asm __volatile ("" : : "x" (x)); \
|
||||||
|
else \
|
||||||
|
__asm __volatile ("" : : "f" (x)); \
|
||||||
|
} while (0)
|
||||||
|
#else
|
||||||
|
# define math_opt_barrier(x) \
|
||||||
|
({ __typeof (x) __x; \
|
||||||
|
if (__builtin_types_compatible_p (__typeof (x), _Float128)) \
|
||||||
|
{ \
|
||||||
|
__x = (x); \
|
||||||
|
__asm ("" : "+m" (__x)); \
|
||||||
|
} \
|
||||||
|
else \
|
||||||
|
__asm ("" : "=t" (__x) : "0" (x)); \
|
||||||
|
__x; })
|
||||||
|
# define math_force_eval(x) \
|
||||||
|
do { \
|
||||||
|
__typeof (x) __x = (x); \
|
||||||
|
if (sizeof (x) <= sizeof (double) \
|
||||||
|
|| __builtin_types_compatible_p (__typeof (x), _Float128)) \
|
||||||
|
__asm __volatile ("" : : "m" (__x)); \
|
||||||
|
else \
|
||||||
|
__asm __volatile ("" : : "f" (__x)); \
|
||||||
|
} while (0)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif
|
||||||
Reference in New Issue
Block a user