
Index
365
24593—Rev. 3.09—September 2003
AMD 64-Bit Technology
U
UCOMISD instruction.............................. 205
UCOMISS instruction............................... 205
UE bit ................................ 143, 215, 291, 341
ulp ...................................................... 159, 315
UM bit................................................ 143, 294
underflow ........................................ xxvii, 341
underflow exception (UE) ............... 215, 341
unit in the last place (ulp)............... 159, 315
unmask .............................................. 143, 294
unmasked responses......................... 221, 348
unnormal numbers ................................... 305
unordered compare .......................... 206, 328
unpack instructions.................. 169, 196, 252
UNPCKHPD instruction .......................... 196
UNPCKHPS instruction........................... 196
UNPCKLPD instruction........................... 196
UNPCKLPS instruction............................ 196
unsupported number types...................... 305
V
vector............................................. xxviii, 105
vector operations.............................. 129, 231
virtual address ...................................... 13, 15
virtual memory ........................................... 11
virtual-8086 mode....................... xxviii, 9, 16
W
weakly ordered memory........................... 112
write buffers.............................................. 119
write combining........................................ 115
write order................................................. 115
X
x87 control word register......................... 293
x87 environment............................... 298, 333
x87 floating-point programming.............. 285
x87 status word register........................... 289
x87 tag word register................................ 295
XADD instruction....................................... 78
XCHG instruction....................................... 78
XLAT instruction........................................ 55
XMM registers .......................................... 139
XOR instruction.......................................... 67
XORPD instruction................................... 207
XORPS instruction................................... 207
Y
Y bit ........................................................... 295
Z
ZE bit................................. 143, 214, 291, 341
zero..................................................... 155, 307
zero flag....................................................... 40
zero-divide exception (ZE).............. 214, 341
zero-extension................................. 20, 33, 83
ZF bit........................................................... 40
ZM bit................................................ 143, 294