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3-438 Vol. 2A HADDPD—Packed Double-FP Horizontal Add
INSTRUCTION SET REFERENCE, A-M
#UD If an unmasked SIMD floating-point exception and CR4.OSXM-
MEXCPT[bit 10] = 0.
If CR0.EM[bit 2] = 1.
If CR4.OSFXSR[bit 9] = 0.
If CPUID feature flag SSE3 is 0.
If the LOCK prefix is used.