* rs6000-tdep.c (IS_EFP_PSEUDOREG): Use correct constant for
the EFP register set size.
(efpr_pseudo_register_read): Use regcache_raw_read_part to read
data from the VMX register.
(efpr_pseudo_register_write): Use regcache_raw_write_part to read
and write data from/to the VMX register.
gdb/testsuite/
* gdb.arch/vsx-regs.exp: Add "vector_register1_vr" and
"vector_register2_vr" test strings. Test the extended floating
point registers (F32~F63).
* lib/gdb.exp (skip_vsx_tests): Update compile flags for the
IBM XL C compiler. Make the test program use a register provided
by the compiler for the lxvd2x instruction.
