Special -- FP Vector Addition and Subtraction

Special FP Vector Addition and Subtraction

The addition and subtraction of simultaneous vectors are a relatively simple matter for vector math instructions to handle. SSE3 added simultaneous functionality, while older versions have to simulate it.

Vector Floating-Point Addition and Subtraction

d _(odd) = b _(odd) + a _(odd) d _(even) = b _(even) a _(even)

d ₍₃₎ = b ₍₃₎ + a ₍₃₎ d ₍₂₎ = b ₍₂₎ a ₍₂₎ d ₍₁₎ = b ₍₁₎ + a ₍₁₎ d ₍₀₎ = b ₍₀₎ a ₍₀₎

Mnemonic

P

PII

K6

3D!

3Mx+

SSE

SSE2

A64

SSE3

E64T

ADDSUBPD