PowerPC: remove branch prediction from rint implementation

The branch prediction hints is actually hurts performance in this case.
The assembly implementation make two assumptions: 1. 'fabs (x) < 2^52'
is unlikely and 2. 'x > 0.0' is unlike (if 1. is true). Since it a
general floating point function, expected input is not bounded and then
it is better to let the hardware handle the branches.

1 files changed, 4 insertions, 0 deletions

diff --git a/benchtests/rint-inputs b/benchtests/rint-inputs
new file mode 100644
index 0000000000..a5f83dc8f9
--- /dev/null
+++ b/benchtests/rint-inputs
@@ -0,0 +1,4 @@
+78.5
+-78.5
+4503599627370497.0
+-4503599627370497.0