Add CPUID::have_altivec for AltiVec runtime detection.

Relies on mfspr emulation/trapping by the kernel, which works on (at least)
Linux and NetBSD.

1 files changed, 2 insertions, 0 deletions

diff --git a/doc/examples/cpuid.cpp b/doc/examples/cpuid.cpp
index 59940b500..1bdee787c 100644
--- a/doc/examples/cpuid.cpp
+++ b/doc/examples/cpuid.cpp
@@ -12,4 +12,6 @@ int main()
    printf("SSSE3 %d\n", CPUID::has_ssse3());
    printf("SSE41 %d\n", CPUID::has_sse41());
    printf("SSE42 %d\n", CPUID::has_sse42());
+
+   printf("AltiVec %d\n", CPUID::has_altivec());
    }