User Guide

Index 303
24592—Rev. 3.15—November 2009 AMD64 Technology
T
tag bits ........................................................... 232, 246
tag word................................................................ 246
task switch .............................................................. 81
task-state segment (TSS) .......................................... 81
temporal locality...................................................... 98
TEST instruction ..................................................... 54
test instructions................................................ 53, 270
tiny numbers.................................... 128, 181, 254, 281
TOP field ....................................................... 240, 243
top-of-stack pointer (TOP)....................... 232, 240, 243
transcendental instructions...................................... 269
trap ......................................................................... 87
trigonometric functions .......................................... 269
TSS ...................................................................... xxv
U
UCOMISD instruction ........................................... 173
UCOMISS instruction ............................................ 173
UE bit ............................................. 119, 181, 243, 282
ulp ................................................................. 133, 261
UM bit ........................................................... 119, 244
underflow....................................................... xxv, 282
underflow exception (UE) ............................... 181, 282
unit in the last place (ulp) ................................ 133, 261
unmask .......................................................... 119, 244
unmasked responses........................................ 187, 288
unnormal numbers ................................................. 253
unordered compare ......................................... 174, 271
unpack instructions ................................. 141, 165, 213
UNPCKHPD instruction......................................... 165
UNPCKHPS instruction ......................................... 165
UNPCKLPD instruction ......................................... 165
UNPCKLPS instruction.......................................... 165
unsupported number types ...................................... 253
V
vector.............................................................. xxv, 86
vector operations ............................................ 106, 194
virtual address ................................................... 11, 12
virtual memory .......................................................... 9
virtual-8086 mode......................................... xxv, 7, 13
W
weakly ordered memory ........................................... 91
write buffers ............................................................ 97
write combining....................................................... 94
write order............................................................... 94
X
x87 control word register........................................ 244
x87 environment ............................................ 248, 275
x87 floating-point programming.............................. 237
x87 instructions......................................................... 4
x87 status word register .......................................... 241
x87 tag word register .............................................. 246
XADD instruction .................................................... 65
XCHG instruction .................................................... 65
XLAT instruction..................................................... 47
XMM registers....................................................... 116
XOR instruction....................................................... 56
XORPD instruction ................................................ 175
XORPS instruction................................................. 175
Y
Y bit...................................................................... 246
Z
ZE bit............................................. 119, 181, 242, 281
zero............................................................... 129, 255
zero flag .................................................................. 35
zero-divide exception (ZE).............................. 181, 281
zero-extension.............................................. 16, 29, 68
ZF bit ...................................................................... 35
ZM bit........................................................... 119, 244