Datasheet

Instruction Set Description

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4.6.4.1 ADDA

ADDA Add 20-bit source to a 20-bit destination register

ADDA Rsrc,Rdst

Syntax

ADDA #imm20,Rdst

Operation src + Rdst → Rdst

Description The 20-bit source operand is added to the 20-bit destination CPU register. The previous

contents of the destination are lost. The source operand is not affected.

Status Bits N: Set if result is negative (Rdst.19 = 1), reset if positive (Rdst.19 = 0)

Z: Set if result is zero, reset otherwise

C: Set if there is a carry from the 20-bit result, reset otherwise

V: Set if the result of two positive operands is negative, or if the result of two negative

numbers is positive, reset otherwise

Mode Bits OSCOFF, CPUOFF, and GIE are not affected.

Example R5 is increased by 0A4320h. The jump to TONI is performed if a carry occurs.

ADDA #0A4320h,R5 ; Add A4320h to 20-bit R5

JC TONI ; Jump on carry

... ; No carry occurred

258

CPUX SLAU144J–December 2004–Revised July 2013

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