參數(shù)資料
型號(hào): S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 60/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
153
32000D–04/2011
AVR32
CLZ – Count Leading Zeros
Architecture revision:
Architecture revision1 and higher.
Description
Counts the number of binary zero bits before the first binary one bit in a register value. The value
returned from the operation can be used for doing normalize operations. If the operand is zero,
the value 32 is returned.
Operation:
I.
temp
← 32;
for (i = 31; i >= 0; i--)
if (Rs[i] == 1) then
temp
← 31 - i;
break;
Rd
← temp;
Syntax:
I.
clz
Rd, Rs
Operands:
I.
{d, s}
∈ {0, 1, …, 15}
Status Flags
Q:
Not affected
V:
Not affected
N:
Not affected
Z:
Z
← (RES[31:0] == 0)
C:
C
← (RES[31:0] == 32)
Opcode:
111
Rs
00000
Rd
31
29
28
25
24
20
19
16
0001001000000000
15
12
11
8
7
0
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