參數(shù)資料
型號： ARM966E-S
英文描述： ARM966E-S Microprocessor Core preliminary technical manual 6/01
中文描述： ARM966E - ?微處理器核的初步技術手冊6月1日
文件頁數(shù)： 142/166頁
文件大小： 1145K
代理商： ARM966E-S
A-2
ARM9E-S Enhanced Instructions
Rev. A
Copyright 1999-2001 by LSI Logic Corporation. All rights reserved.
In each of the instruction definitions, the following abbreviations are used:
Note also that in the instruction definitions, the term UNPREDICTABLE
means the result of an instruction cannot be relied upon. Unpredictable
instructions or results must not represent security holes.
UNPREDICTABLE instructions must not halt or hang the processor, or
any parts of the system.
{cond}
Two character conditional execution mnemonic. Refer to the
ARM Architecture Reference Manual for a complete listing of
condition codes.
Rd,Rs,Rn,Rm
Denote ARM register numbers.
x/y
Denotes use of either the high or low half of an ARM register
as a source operand. ‘T’ is used to denote the top (most
significant), and ‘B’ denotes the bottom (least significant)
halfword.
SBZ
A field in the instruction opcode that should be written as zero.
Nonzero values produce unpredictable results.
SignExtend(a)
Sign-extends (propagates the sign bit) its argument to 32 bits.
SAT(f)
Saturates the result of
f
to 32 bits. If
f
overflows 32 bits and is
negative, then SAT(
f
) returns the maximum negative value that
can be represented in 32 bits (0x80000000). If
f
overflows
32 bits and is positive, SAT(
f
) returns 0x7FFFFFFF.
DoesSat(f)
Returns 1 if
f
would saturate when truncated to 32 bits,
otherwise returns 0.
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