參數(shù)資料
型號: D950-CORE
廠商: 意法半導(dǎo)體
元件分類: 數(shù)字信號處理
英文描述: 16-Bit Fixed Point Digital Signal Processor DSP Core
中文描述: 16位定點(diǎn)數(shù)字信號處理器DSP核
文件頁數(shù): 16/89頁
文件大?。?/td> 560K
代理商: D950-CORE
16/89
D950-Core
4.1.4 Barrel Shifter Unit (BSU)
The D950-Core BSU provides a complete set of shifting functions
Arithmetic shift: 40-bit input (either a 32 bit operand sign extended to 40-bit, or a 40-bit
accumulator), providing a valid result
Logical shift: provides a 32-bit result which is loaded into a 40-bit accumulator, the 8-bit
extension of which is reset.
Rotation:
8-bit EXT/sign
16-bit MSB
16-bit LSB
TST
8-bit EXT/sign
16-bit MSB
16-bit LSB
0
TST
Right: shifts the 40-bit input data to the right, the upper part is sign extended
Left: shifts the 40-bit input data to the left, the upper part is fed by 0
8-bit EXT = 0
16-bit MSB
16-bit LSB
TST
8-bit EXT = 0
16-bit MSB
16-bit LSB
0
TST
Right: shifts the 32-bit input data to the right, the upper part is fed by 0
Left: shifts the 32-bit input data to the left, the upper part is fed by 0
0
8-bit EXT = 0
16-bit MSB
16-bit LSB
16-bit MSB
16-bit LSB
TST
Right: rotates the input data to the right (only through the BSC register)
Left with TST: rotates the 33-bit data made of the concatenation of TST-bit
Left: rotates the 32-bit input data to the left
TST
of CCR with the 32-bit input data to the left (the LSB of the 32-bit input is
fed by TST-bit, the MSB of the 32-bit input feeds the TST-bit of CCR).
5
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