Analog Devices ADSP-BF53x Blackfin Reference page 452

Instruction Overview
BXORSHIFT, BXOR
General Form
dest_reg = CC = BXORSHIFT ( A0, src_reg )
dest_reg = CC = BXOR ( A0, src_reg )
dest_reg = CC = BXOR ( A0, A1, CC )
A0 = BXORSHIFT ( A0, A1, CC )
Syntax
Type I (Without Feedback)
LFSR
Dreg_lo = CC = BXORSHIFT ( A0, Dreg ) ;
Dreg_lo = CC = BXOR ( A0, Dreg ) ;
Type I (With Feedback)
LFSR
Dreg_lo = CC = BXOR ( A0, A1, CC ) ;
A0 = BXORSHIFT ( A0, A1, CC ) ;
Syntax Terminology
:
Dreg R7–0
:
Dreg_lo R7–0.L
Instruction Length
In the syntax, comment (b) identifies 32-bit instruction length.
Functional Description
Four Bit-Wise Exclusive-OR (
types of linear feedback shift register (
12-10 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
/* (b) */
/* (b) */
/* (b) */
) instructions support two different
BXOR
) implementations.
LFSR
/* (b) */