- In computing, an
opcode (abbreviated from
operation code) is an
enumerated value that
specifies the
operation to be performed.
Opcodes are emplo**** in...
-
omitted circuitry to
detect invalid opcodes and
generate a trap to an
error handler. The
operation of many of
these opcodes happens as a side
effect of the...
- An
opcode table (also
called an
opcode matrix) is a
visual representation of all
opcodes in an
instruction set. It is
arranged such that each axis of...
- ****embly,
numerical opcodes and
operands are
replaced with
mnemonics and labels. For example, the x86
architecture has
available the 0x90
opcode; it is represented...
- PREFETCHW,
opcode 0F 0D /0 as well as
opcodes 0F 0D /2../7 are all do****ented to be
performing prefetch. On
Intel processors with PREFETCHW,
these opcodes are...
- In each case, the MOV
mnemonic is
translated directly into one of the
opcodes 88-8C, 8E, A0-A3, B0-BF, C6 or C7 by an ****embler, and the
programmer normally...
-
design flaw was
discovered by programmers. Due to
incomplete opcode decoding, two
illegal opcodes, 0x9D and 0xDD, will
cause the
program counter on the processor...
- the
semantics of a few of the
opcodes, and
SCHIP continued to use
those new
semantics in
addition to
changing other opcodes. Many
online resources about...
-
Fetching the
instruction opcodes from
program memory well in
advance is
known as
prefetching and it is
served by
using a
prefetch input queue (PIQ). The...
-
financial software. The
opcodes mentioned above give the x86
rudimentary BCD support.
Adding BCD
numbers using these opcodes is a
complex task, and requires...
