7079329: Adjust allocation prefetching for T4
Summary: on T4 2 BIS instructions should be issued to prefetch 64 bytes
Reviewed-by: iveresov, phh, twisti
os_family = solaris
arch = sparc
arch_model = sparc
os_arch = solaris_sparc
os_arch_model = solaris_sparc
lib_arch = sparcv9
compiler = sparcWorks
sysdefs = -DSOLARIS -DSPARC_WORKS -DSPARC