AT75C datasheet(39/171 Pages) ATMEL

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AT75C DSP Subsystem

1368C–INTAP–08/02

ADDV – Add Long Immediate Value or Data Memory Loca-

tion

Syntax:

addv ##long immediate, operand

Operation:

operand + ##long immediate

−> operand

The operand and the long immediate values are sign-extended. If the

operand is not part of an accumulator (aXl, aXh, aXe, bXl, bXh), then

the accumulators are unaffected. If the operand is a part of an accumu-

lator, only the addressed part is affected.

Operand:

REG

(rN)

direct address

Affected Flags:

Z, M, C are a result of the 16-bit operation. M is affected by bit 15.

When the operand is st0, st0 (including the flags) accepts the addition

result regardless of a0e bits.

Cycles:

Words:

Notes:

The REG cannot be aX, bX, p, pc. Note that aX can be used in

add

##long immediate, aX instruction.

When adding a long immediate value to st0, st0 (including the flags)

accepts the ALU output result. When adding a long immediate value to

st1, the flags are affected by the ALU output, as usual.

Note that when the operand is part of an accumulator, only the

addressed part is affected. For example, if the instruction

addv ##long

immediate, a01 generates a carry. The carry flag is set. However, a0h is

unchanged. On the other hand, the instruction

addl ##long immediate,

a0l (with same a0 and immediate values) changes the a0h and affects

the carry flag according to bit 36 of the ALU result.

NVCE

–

-x

–––

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