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alpha: Implement math_opt_barrier and math_force_eval

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Richard Henderson 2014-07-03 08:56:55 -07:00
parent ca7b945c73
commit d5e16ade14
2 changed files with 9 additions and 0 deletions
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ChangeLog
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@ -1,5 +1,8 @@
2014-07-03 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/fpu/math_private.h (math_opt_barrier): New.
(math_force_eval): New.
* sysdeps/alpha/fpu/s_lround.c: Add 0.5 with chopped rounding.
* sysdeps/alpha/fpu/s_lroundf.c: Likewise.

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sysdeps/alpha/fpu/math_private.h
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@ -13,6 +13,12 @@
# 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>
#ifdef __alpha_fix__