Adds the source operand and the extend bit to the destination operand and stores the result in the destination location. The operands can be addressed in two different ways:
- Data register to data register
- The data registers specified in the instruction contain the operands.
- Memory to memory
- The address registers specified in the instruction address the operands using the predecrement addressing mode.
The size of the operation can be specified as byte, word, or long.
| Operation: | ADDX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Syntax: | ADDX Dy, Dx ADDX -(Ay), -(Ax) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Data Size: | Byte Word Long | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Flags: |
X Set the same as the carry bit N Set if the result is negative; cleared otherwise Z Cleared if the result is nonzero; unchanged otherwise V Set if an overflow occurs; cleared otherwise C Set if a carry is generated; cleared otherwise Normally, the Z condition code bit is set via programming before the start of an operation. This allows successful tests for zero results upon completion of multiple-precision operations. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Format: |
Rx the source register. Ry the destination register. R/M Specifies the operand addressing mode:
Size the size of the operation:
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