U
UCOMISS instruction. . . . . . . . . . . . . . . . . . .3-690
UD2 instruction. . . . . . . . . . . . . . . . . . . . . . . .3-697
Undefined format opcodes. . . . . . . . . . . . . . .3-265
Underflow, FPU exception
(see Numeric underflow exception)
Unordered values. . . . 3-180
,
3-183
,
3-265
,
3-267
UNPCKHPS instruction . . . . . . . . . . . . . . . . .3-698
UNPCKLPS instruction . . . . . . . . . . . . . . . . .3-701
V
Vector (see Interrupt vector)
Vector (see INTn instruction)
VERR instruction . . . . . . . . . . . . . . . . . . . . . .3-704
Version information, processor . . . . . . . . . . .3-111
VERW instruction. . . . . . . . . . . . . . . . . . . . . .3-704
Virtual 8086 Mode Enhancements flag,
CPUID instruction . . . . . . . . . . . . .3-114
Virtual 8086 Mode flag, EFLAGS register . . .3-321
VM flag, EFLAGS register . . . . . . . . . . . . . . .3-321
VME flag, CPUID instruction . . . . . . . . . . . . .3-114
W
WAIT instruction. . . . . . . . . . . . . . . . . . . . . . .3-707
WBINVD instruction. . . . . . . . . . . . . . . . . . . .3-708
Write-back and invalidate caches . . . . . . . . .3-708
WRMSR instruction . . . . . . . . . . . . . .3-114
,
3-710
X
XADD instruction . . . . . . . . . . . . . . . .3-367
,
3-712
XCHG instruction. . . . . . . . . . . . . . . .3-367
,
3-714
XLAT instruction. . . . . . . . . . . . . . . . . . . . . . .3-716
XLATB instruction . . . . . . . . . . . . . . . . . . . . .3-716
XMM flag, CPUID instruction. . . . . . . . . . . . .3-115
XOR instruction . . . . . . . . . . . . . . . . .3-367
,
3-718
XORPS instruction. . . . . . . . . . . . . . . . . . . . .3-720
Z
ZF (zero) flag, EFLAGS register . . . 3-100
,
3-102
,
3-342
,
3-372
,
3-375
,
3-605
,
3-704
