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.

1 files changed, 0 insertions, 39 deletions

diff --git a/sysdeps/i386/fpu/fenv_private.h b/sysdeps/i386/fpu/fenv_private.h
index 357613a500..59e83d858a 100644
--- a/sysdeps/i386/fpu/fenv_private.h
+++ b/sysdeps/i386/fpu/fenv_private.h
@@ -5,45 +5,6 @@
 #include <fenv.h>
 #include <fpu_control.h>
 
-#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
-
 /* This file is used by both the 32- and 64-bit ports.  The 64-bit port
    has a field in the fenv_t for the mxcsr; the 32-bit port does not.
    Instead, we (ab)use the only 32-bit field extant in the struct.  */