Attempting to decode: 0f a8 
iclass PUSH	category PUSH	ISA-extension BASE	ISA-set I86
instruction-length 2
operand-width 32
effective-operand-width 32
effective-address-width 32
stack-address-width 32
iform-enum-name PUSH_GS
iform-enum-name-dispatch (zero based) 6
iclass-max-iform-dispatch 11
Nominal opcode position 1
Nominal opcode 0xa8
Operands
#   TYPE               DETAILS        VIS  RW       OC2 BITS BYTES NELEM ELEMSZ   ELEMTYPE   REGCLASS
#   ====               =======        ===  ==       === ==== ===== ===== ======   ========   ========
0   REG0               REG0=GS   IMPLICIT   R         W   16     2     1     16        INT         SR
1   REG1        REG1=STACKPUSH SUPPRESSED  RW       SPW   32     4     1     32        INT     PSEUDO
2   MEM0           (see below) SUPPRESSED   W       SPW   32     4     1     32        INT    INVALID
3  BASE0             BASE0=ESP SUPPRESSED  RW       SSZ   32     4     1     32        INT        GPR
Memory Operands
  0 written SEG= SS BASE= ESP/GPR  ASZ0=32
  MemopBytes = 4
ATTRIBUTES: FIXED_BASE0 SCALABLE STACKPUSH0 
ISA SET: [I86]