Comparing the contents of YMM/XMM registers

[Kryptos]

I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions?

[Kryptos]

Well, I figured it out...

pcmpeqb xmm0, xmm1
pmovmskb r15, xmm0
cmp r15, 0xffff
jne failed

this also seems to work for just [bits 63..0]
vcomisd xmm0, xmm1
jbe failed