Many of the tests for the x86-compatible vector intrinsics implementations were protected by "#ifdef __BUILTIN_CPU_SUPPORTS__", which is only enabled with recent enough glibc that in most environments, the test were silently passing without actually testing anything.
Patches which follow: 01: Fix the implementations. 02: Fix the test cases. 03: Enable the tests to actually run the test code. Bootstrap and regression tested on POWER8 ppc64le, ppc64(be), ppc(32bit be), and POWER7 ppc64(be). OK for trunk? PC
