INSV Instruction

Purpose:

To copy a long word to a bit field.

Format:

opcode src.rl, startpos.rl, size.rb, base.vb

Operation:

{field} <- src<(size-1):0>

Condition
Codes:

N <- 0;
Z <- 0;
V <- 0;
C <- 0;

Exceptions:

Reserved Operand

Opcodes:

INSV

Insert Field

Description:

The field specified by the position, size and base operands is replaced by bits <(size-1):0> of the source operand. If the size operand is 0, the only action is to affect the condition codes.

Notes:


1.: A reserved operand fault occurs if the unsigned size operand is greater than 32 or the bit field is contained in a register and the position operand is outside the range 0 - 31.
2.: On a reserved operand fault, the field is unaffected and the condition codes are unpredictable.
3.: If the base address is a register, the bit field may extend into the next register.
4.: The startpos operand may be negative.