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Aetias
37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
# Inline assembler
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- [Differences from standalone assembler](#differences-from-standalone-assembler)
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## Differences from standalone assembler
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Below is a list of differences between the inline assembler and the standalone disassembler. If something is missing, feel free
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to contribute to the list!
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- [Pool constants](#pool-constants)
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- [Data sections](#data-sections)
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- [Comments](#comments)
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### Pool constants
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There is no `.word` or other data directives in the inline assembler. Instead, use the built-in `dcd` instruction:
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```asm
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mov r0, [pc, #0]
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bx lr
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dcd 0x1234
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```
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This can also be written as:
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```asm
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ldconst 0x1234
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bx lr
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```
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The built-in `ldconst` instruction will be replaced by an ARM load instruction and also append a pool constant to the function.
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### Data sections
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Directives such as `.section`, `.data` and `.bss` are not supported in the inline assembler. It's possible to change section
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with a `#pragma`, but there's no need to. Data should only be defined in standalone assembly or C/C++.
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### Comments
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Inline assembly is handled by the compiler, so comments must be in C/C++ format. This means using `//` and `/* */` instead of
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`#` or `;`.
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Semicolons `;` instead mark the end of an instruction and are optional. You can use them to put multiple instructions on one
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line, but we avoid doing it so that we can preserve as much similarity to standalone assembly as possible.
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