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Server Gurus Discussions

Tapejara
Journeyman III

Is this a mistake in the AMD64 Vol 4 Manual?

Reading the AMD Volume 4(26568-Rev. 3.20): 128-Bit and 256-Bit Media Instructions Page 23 says:

ADDPD

The first source operand is an XMM register. The second source operand is either an XMM register or
a 128-bit memory location.

This has to be wrong. Memory locations in AMD64 are 64-bits in size. Shouldn't it read: The second source operand is either an XMM register or a memory location of the first byte of a 128-bit value. 

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