[PATCH] powerpc: Avoid putting floating point values in memory

[Tulio Magno Quites Machado Filho]

2017-09-22  Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>

	* sysdeps/powerpc/fpu/math_private.h (math_opt_barrier):
	(math_force_eval): Add powerpc version.
---
 sysdeps/powerpc/fpu/math_private.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sysdeps/powerpc/fpu/math_private.h b/sysdeps/powerpc/fpu/math_private.h
index 396fd05..472182d 100644
--- a/sysdeps/powerpc/fpu/math_private.h
+++ b/sysdeps/powerpc/fpu/math_private.h
@@ -23,6 +23,13 @@
 #include <ldsodefs.h>
 #include <dl-procinfo.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>
 
 #if defined _ARCH_PWR9 && __HAVE_DISTINCT_FLOAT128
-- 
2.9.5