Editing Intel 8087 (section)

===IEEE floating-point standard===
When Intel designed the 8087, it aimed to make a standard floating-point format for future designs. An important aspect of the 8087 from a historical perspective was that it became the basis for the [[IEEE 754-1985|IEEE 754]] floating-point standard. The 8087 did not implement the eventual IEEE 754 standard in all its details, as the standard was not finished until 1985, but the [[80387]] did. The 8087 provided two basic [[single precision|32]]/[[double precision|64-bit]] floating-point data types and an additional [[extended precision|extended 80-bit]] internal temporary format (that could also be stored in memory) to improve accuracy over large and complex calculations. Apart from this, the 8087 offered an 80-bit/18-digit packed BCD ([[binary-coded decimal]]) format and 16-, 32-, and 64-bit integer data types.<ref name="cpu-world.com"/>

{|style="text-align:center;margin-left:0.5in;font-size:88%"
|-
|colspan="18" |'''8087 data types'''
|-
|style="width:10px"|<sup>7</sup><sub>9</sub>
|style="width:70px"|...
|style="width:10px"|<sup>7</sup><sub>1</sub>
|style="width:25px"|...
|style="width:10px"|<sup>6</sup><sub>7</sub>
|style="width:25px"|...
|style="width:10px"|<sup>6</sup><sub>3</sub>
|style="width:65px"|...
|style="width:10px"|<sup>5</sup><sub>0</sub>
|style="width:70px"|...
|style="width:10px"|<sup>3</sup><sub>1</sub>
|style="width:50px"|...
|style="width:10px"|<sup>2</sup><sub>2</sub>
|style="width:30px"|...
|style="width:10px"|<sup>1</sup><sub>5</sub>
|style="width:70px"|...
|style="width:10px"|<sup>0</sup><sub>0</sub>
|style="width:auto;text-align:left"| ''(bit position)''
|-
|colspan="1"  style="background-color:#FC9"| ±
|colspan="3"  style="background-color:#FCC"| Exponent
|colspan="13" style="background-color:#CEC"| Fraction
|style="text-align:left"| 80-bit extended-precision real
|-
|colspan="6"  style="background-color:#FFF"| 
|colspan="1"  style="background-color:#FC9"| ±
|colspan="1"  style="background-color:#FCC"| Exponent
|colspan="9"  style="background-color:#CEC"| Fraction
|style="text-align:left"| 64-bit double-precision real
|-
|colspan="10" style="background-color:#FFF"| 
|colspan="1"  style="background-color:#FC9"| ±
|colspan="1"  style="background-color:#FCC"| Exponent
|colspan="5"  style="background-color:#CEC"| Fraction
|style="text-align:left"| 32-bit single-precision real
|-
| colspan="18" style="height:4px" |
|-
|colspan="1"  style="background-color:#FC9"| ±
|colspan="1"  style="background-color:#CCC"| 
|colspan="15" style="background-color:#CCF"| BCD Integer
|style="text-align:left"| 18-digit decimal integer
|-
| colspan="18" style="height:4px" |
|-
|colspan="6"  style="background-color:#FFF"| 
|colspan="1"  style="background-color:#FC9"| ±
|colspan="10" style="background-color:#BCF"| Integer
|style="text-align:left"| 64-bit binary integer
|-
|colspan="10" style="background-color:#FFF"| 
|colspan="1"  style="background-color:#FC9"| ±
|colspan="6"  style="background-color:#BCF"| Integer
|style="text-align:left"| 32-bit binary integer
|-
|colspan="14" style="background-color:#FFF"| 
|colspan="1"  style="background-color:#FC9"| ±
|colspan="2"  style="background-color:#BCF"| Integer
|style="text-align:left"| 16-bit binary integer
|}