Implement StringGetCharsNoCheck intrinsic for X86

Generate inline code for String.GetChars internal no checking form for
X86 and X86_64. Use REP MOVSW to copy the characters, rather than
memcpy as Quick does.

Change-Id: Ia67aff248461b394f97c48053f216880381945ff
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
2 files changed