The last example in Figure 2 illustrates the declaration of an array. Unlike in high level lan-guages where arrays can have many dimensions and are accessed by indices, arrays in assembly language are simply a number of cells located contiguously in memory. Two other common meth-
Here is some ARM assembly code to sort an array of pointers. Each pointer in the array references a C struct with the following layout
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See the section on Advanced Array Access for more complex examples. Array access requires two variable, the array and an index into the array. To do this in assembly language, we get the address of the beginning of the array, and compute the address of the i-th item by adding the index. This is illustrated in the following table.
ARM® Architecture Reference Manual, ARMv7-A and ARMv7-R edition (ARM DDI 0406), the ARM ARM. Note In the event of a contradiction between this book and the ARM ARM, the ARM ARM is definitive and must take precedence. ARM® Compiler Toolchain Assembler Reference (ARM DUI 0489). Cortex™-A Series Programmer’s Guide (ARM DEN0013B).
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Apr 16, 2020 · asm-declaration gives the ability to embed assembly language source code within a C++ program. This declaration is conditionally-supported and implementation defined, meaning that it may not be present and, even when provided by the implementation, it does not have a fixed meaning.