Freescale-semiconductor StarCore SC140 Manual do Utilizador descarregar pdf (Página 517)

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101

INSERT

SC140 DSP Core Reference Manual A-203

INSERT Insert Bit Field (DALU) INSERT

Description

These operations insert a bit field from a source data register (Db) into the destination data register (Dn).

The bits outside of the inserted field in the destination register are unchanged. In addition, the source

Status and Conditions that Affect Instruction

None.

Status and Conditions Changed by Instruction

Example

insert #12,#22,d6,d7

Operation Assembler Syntax

Db[(width – 1):0] → Dn[(offset + width – 1):offset]

width = #U6; offset = #u6

INSERT #U6,#u6,Db,Dn {0 ≤ U6 ≤ 40}

{0 ≤ u6 ≤ 40}[#U6 + #u6 ≤ 40]

width = Da[13:8]; offset = Da[5:0]

INSERT Da,Db,Dn {0 ≤ Da[5:0] ≤ 40}

{0 ≤ Da[13:8] ≤ 16}{Da[13:8] + Da[5:0]

≤ 40}

INSERT #U6,#u6,Db,Dn

Uses two immediate unsigned 6-bit integers for the width (#U6) and offset (#u6).

INSERT Da,Db,Dn

Uses a supplemental data register Da for the width (bits 13:8) and the offset (bits 5:0).

Ln L Clears the Ln bit in the destination register.

$FF AF6C 3465

L7:D7

$0:$00 0000 000F $0:$01 1940 000F

1 1 1 1 1 1 1 1 1 0 1 0 1 1 1 1 0 1 1 0 1 1 0 0 0 0 1 1 0 1 0 0 0 1 1 0 0 1 0 1

0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

1 1

OFFSET = 22

WIDTH = 12

1 2 ... 512 513 514 515 516 517 518 519 520 521 522 ... 759 760

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