ARM: Replace branch with conditional store in function prologue.

Use conditional store to replace the receiver with undefined for
strict mode functions and builtins instead of branching code. This
has similar performance characteristics but saves one branch
instruction per strict mode function.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/48473002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17412 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Introduce andps for IA32/X64

replace andpd and pand in Math.abs

BUG=
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/44153002

Patch from Weiliang Lin <weiliang.lin@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17413 ce2b1a6d-e550-0410-aec6-3dcde31c8c00