Freescale-semiconductor StarCore SC140 Manual do Utilizador descarregar pdf (Página 619)

100

101

MOVES.L

SC140 DSP Core Reference Manual A-305

MOVES.L Move Long to MOVES.L

Memory With Scaling and Saturation (AGU)

Description

The data is scaled according to the scaling mode, and saturated if the Ln bit is set. The address register

values must be long word-aligned. This instruction is affected by by SM (Saturation Mode bit - SR[2]).

When SM is set, scaling is not performed, and the scale bits S[1:10] have no effect

Status and Conditions that Affect Instruction

Status and Conditions Changed by Instruction

Example

moves.l d0,(r0)

Operation Assembler Syntax

Db → (EA)

MOVES.L Db,(EA)

Moves a saturated long word from a data register (Db) to a memory address pointed to by an address

MCTL[31:0] AM3–AM0 Address modification bits when updating R0–R7. Otherwise, the

instruction is not affected by MCTL.

SR[5:4] S[1:0] Scaling mode bits choose: no scaling, scale up one bit, or

scale down one bit.

Ln L Limited values are written to the destination if the Ln bit is set.

SR[6] S Scaling bit, set when the absolute value of the data moved (after

scaling and limiting) is greater than or equal to 0.25 and less than

0.75.

$00E0 0000 $00E0 0000

$0000 0054

L0:D0

$1:$00 8000 0000

$00000054

$7FFF FFFF

1 2 ... 614 615 616 617 618 619 620 621 622 623 624 ... 759 760

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