Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 126

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Select Bytes. Selects each byte of its result from either its first operand or its second operand, according to the values of
the GE flags.

Syntax

SEL{<c>}{<q>} {<Rd>,} <Rn>, <Rm>

where:

c, q

are standard assembler syntax fields.

Rd

is the destination register.

Rn

is the first register holding the operand.

Rm

is the second register holding the operand.

Operation

The 

SEL

 instruction:

1.

Reads the value of each bit of APSR.GE.

2.

Depending on the value of APSR.GE, assigns the destination register the value of either the first or second oper-
and register.

Restrictions

None.

Condition Flags

These instructions do not change the flags.

Examples

SADD16 R0, R1, R2    ; Set GE bits based on result

SEL    R0, R0, R3    ; Select bytes from R0 or R3, based on GE.