movhlps m7, m6
paddq m4, m5
paddq m6, m7
-%if ARCH_X86_64
+%if VPX_ARCH_X86_64
movq rax, m4
movq [sszq], m6
%else
; accumulate horizontally and store in return value
movhlps m5, m4
paddq m4, m5
-%if ARCH_X86_64
+%if VPX_ARCH_X86_64
movq rax, m4
%else
pshufd m5, m4, 0x1