Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

Vol. 2B A-21
OPCODE MAP
Opcode Group Mod 7,6
Encoding of Bits 5,4,3 of the ModR/M Byte (bits 2,1,0 in
parenthesis)
000 001 010 011 100 101 110
111
0F 71 12 mem
11B psrlw
Nq, Ib
psrlw (66)
Udq, Ib
psraw
Nq, Ib
psraw (66)
Udq, Ib
psllw
Nq, Ib
psllw (66)
Udq, Ib
0F 72 13 mem
11B psrld
Nq, Ib
psrld (66)
Udq, Ib
psrad
Nq, Ib
psrad (66)
Udq, Ib
pslld
Nq, Ib
pslld (66)
Udq, Ib
0F 73 14 mem
11B psrlq
Nq, Ib
psrlq (66)
Udq, Ib
psrldq (66)
Udq, Ib
psllq
Nq, Ib
psllq (66)
Udq, Ib
pslldq (66)
Udq, Ib
0F AE 15 mem fxsave fxrstor ldmxcsr stmxcsr clflush
11B lfence mfence sfence
0F 18 16 mem prefetch
NTA
prefetch
T0
prefetch
T1
prefetch
T2
11B
NOTES:
*
All blanks in all opcode maps are reserved and must not be used. Do not depend on the operation of unde-
fined or reserved locations.
Table A-6. Opcode Extensions for One- and Two-byte Opcodes by Group Number *