Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1717

PADDSB/PADDSW—Packed Add with Saturation (continued)
Virtual-8086 Mode Exceptions
#GP
#UD
#NM
#MF
#PF(fault-code)
#AC(0)
®
Volume 4: IA-32 Intel MMX™ Technology Instruction Reference
If any part of the operand lies outside of the effective address space
from 0 to FFFFH.
If EM in CR0 is set.
If TS in CR0 is set.
If there is a pending FPU exception.
If a page fault occurs.
If alignment checking is enabled and an unaligned memory
reference is made.
4:415