Declare the variables B, M, N, and P as double and assign their respective values:
```
movsd xmm0, qword ptr [B] ; load B into xmm0
movsd xmm1, qword ptr [M] ; load M into xmm1
movsd xmm2, qword ptr [N] ; load N into xmm2
movsd xmm3, qword ptr [P] ; load P into
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