Add - Analog Devices ADSP-BF53x Blackfin Reference

Instruction Overview

Add

General Form
dest_reg = src_reg_1 + src_reg_2
Syntax
Pointer Registers — 32-Bit Operands, 32-Bit Result
Preg = Preg + Preg ;
Data Registers — 32-Bit Operands, 32-bit Result
Dreg = Dreg + Dreg ;
instruction length (a) */
Dreg = Dreg + Dreg (sat_flag) ;
ported, but at the cost of longer instruction length (b) */
Data Registers — 16-Bit Operands, 16-Bit Result
Dreg_lo_hi = Dreg_lo_hi + Dreg_lo_hi (sat_flag) ;
Syntax Terminology
: , ,
Preg P5–0 SP
:
Dreg R7–0
:
Dreg_lo_hi R7–0.L
: nonoptional saturation flag,
sat_flag
Instruction Length
In the syntax, comment (a) identifies 16-bit instruction length. Comment
(b) identifies 32-bit instruction length.
15-6 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
/* (a) */
/* no saturation support but shorter
FP
,
R7–0.H
/* saturation optionally sup-
or
(S) (NS)
/* (b) */