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| en:multiasm:papc:chapter_6_4 [2026/02/27 02:28] – jtokarz | en:multiasm:papc:chapter_6_4 [2026/03/29 18:50] (current) – [Data Types and Encoding] ktokarz |
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| ====== Data Types and Encoding ====== | ====== Data Types and Encoding ====== |
| | The x86 family of processors allows for computations on integer, floating-point, and vector data. This data is stored in memory as binary strings of varying lengths. In this chapter, we will present fundamental data types, as well as the types based on them found in assembly language programs. |
| ===== Fundamental data types ===== | ===== Fundamental data types ===== |
| Fundamental data types cover the types of data elements that are stored in memory as 8-bit (Byte), 16-bit (Word), 32-bit (Doubleword), 64-bit (Quadword) or 128-bit (Double quadword), as shown in figure {{ref>fundamentaldata}}. Many instructions allow for processing data of these types without special interpretation. It depends on the programming engineer how to interpret the inputs and results of instruction execution. The order of bytes in the data types containing more than a single byte is little-endian. The lower (least significant) byte is stored at the lower address of the data. This address represents the address of the data as a whole. | Fundamental data types cover the types of data elements that are stored in memory as 8-bit (Byte), 16-bit (Word), 32-bit (Doubleword), 64-bit (Quadword) or 128-bit (Double quadword), as shown in figure {{ref>fundamentaldata}}. Many instructions allow for processing data of these types without special interpretation. It depends on the programming engineer how to interpret the inputs and results of instruction execution. The order of bytes in the data types containing more than a single byte is little-endian. The lower (least significant) byte is stored at the lower address of the data. This address represents the address of the data as a whole. |
