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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2015-07-13 12:48:33 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2015-07-13 12:48:33 +0100 |
| commit | 82641e16aa83c693974297951e23ba08a3e89652 (patch) | |
| tree | c68da0ab29df51c78bb409bcfe5fab445af61047 | |
| parent | c435989f52204703d524f467c830dc363439e532 (diff) | |
| download | glibc-82641e16aa83c693974297951e23ba08a3e89652.tar.gz glibc-82641e16aa83c693974297951e23ba08a3e89652.tar.xz glibc-82641e16aa83c693974297951e23ba08a3e89652.zip | |
Add AArch64 versions of math_opt_barrier and math_force_eval that avoid going via memory.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/aarch64/fpu/math_private.h | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index df8c19eeab..dfef5e0f60 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2015-04-01 Wilco Dijkstra <wdijkstr@arm.com> + + * sysdeps/aarch64/fpu/math_private.h + (define math_opt_barrier): Add AArch64 version. + (math_force_eval): Likewise. + 2015-07-13 Wilco Dijkstra <wdijkstr@arm.com> * sysdeps/aarch64/strlen.S (strlen): Optimize strlen. diff --git a/sysdeps/aarch64/fpu/math_private.h b/sysdeps/aarch64/fpu/math_private.h index b3c2509961..1f02ddb05a 100644 --- a/sysdeps/aarch64/fpu/math_private.h +++ b/sysdeps/aarch64/fpu/math_private.h @@ -22,6 +22,11 @@ #include <fenv.h> #include <fpu_control.h> +#define math_opt_barrier(x) \ +({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; }) +#define math_force_eval(x) \ +({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "w" (__x)); }) + extern __always_inline double __ieee754_sqrt (double d) { |