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| author | Richard Henderson <rth@twiddle.net> | 2014-07-03 08:56:55 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2014-07-03 08:56:55 -0700 |
| commit | d5e16ade14822f1a125b6d568b1e3e1326e8868d (patch) | |
| tree | d16c46b2ee3dfd84a500c710e347757f1a3eaf43 | |
| parent | ca7b945c7330064f494436611bd35fce6107abf6 (diff) | |
| download | glibc-d5e16ade14822f1a125b6d568b1e3e1326e8868d.tar.gz glibc-d5e16ade14822f1a125b6d568b1e3e1326e8868d.tar.xz glibc-d5e16ade14822f1a125b6d568b1e3e1326e8868d.zip | |
alpha: Implement math_opt_barrier and math_force_eval
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/math_private.h | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 017003e241..e84fbbf739 100644 --- a/ChangeLog +++ b/ChangeLog @@ -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. diff --git a/sysdeps/alpha/fpu/math_private.h b/sysdeps/alpha/fpu/math_private.h index 22ab3b9ab0..9e06e25dc6 100644 --- a/sysdeps/alpha/fpu/math_private.h +++ b/sysdeps/alpha/fpu/math_private.h @@ -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__ |