NLZ: Difference between revisions
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'''NLZ''' is an instruction | '''NLZ''' is an assembly instruction. It converts the number in the [[A register]] to a standard form floating number in the [[floating point accumulator]] (A and D registers), using the ''scaling'' of the NLZ instruction as a scaling factor. | ||
The ''scaling'' is given to the conversion of -128 to 127 (approximately 10<sup>-39</sup> to 10<sup>39</sup>). | The ''scaling'' is given to the conversion of -128 to 127 (approximately 10<sup>-39</sup> to 10<sup>39</sup>). | ||
Revision as of 16:44, 5 April 2009
| NLZ | |
|---|---|
| Description | Normalize (integer to floating) |
| Format | NLZ <scaling> |
| Code | 151 4008 |
| Affected | (T), (A) and (D) |
| Type | User |
| Architecture | {{{Architecture}}} |
NLZ is an assembly instruction. It converts the number in the A register to a standard form floating number in the floating point accumulator (A and D registers), using the scaling of the NLZ instruction as a scaling factor.
The scaling is given to the conversion of -128 to 127 (approximately 10-39 to 1039).
For integers, a scaling factor of +1610 will give a floating point number with the same value as the integer. A larger scaling factor will result in a higher floating point number. Because of the single precision fixed point number, the D register will be cleared.
Example
- NLZ+20 (code 151420) Convert from integer to floating point.
ND-110 48-bit floating point CPU
The ND-110 can have a 48-bit floating point CPU. In the 48-bit floating point CPU a further register (T) and memory location (ea + 2) are used. In this case, the T register is linked to location ea, A to ea + 1 and D to ea + 2.
References
- Norsk Data Document ND–06.014.02 ND-100 REFERENCE MANUAL page 144 and 240
- Norsk Data Document ND–06.029.01 ND-110 Instruction Set page 70 and 72