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| author | jiladahe1997 <[email protected]> | 2021-12-09 11:22:46 +0800 |
|---|---|---|
| committer | jiladahe1997 <[email protected]> | 2021-12-09 11:22:46 +0800 |
| commit | 433e5f81473f71e36fbfb2a4ca5fcbb6b28f57b2 (patch) | |
| tree | 90d431ce948e21a45ae03d1520b98b6a2f7efeae /src | |
| parent | fd9eea2f7ff88862d61687e0376ad8b884693db9 (diff) | |
[bugfix] libcpu/arm/cortex-m/context_gcc: 修复thumb指令集汇编语法错误
当使用thumb指令集时，要求汇编语法中的“条件执行”要跟在IT指令后面，否则会编译不通过。
报错如下：Error: thumb conditional instruction should be in IT block -- `moveq r4,#0x01'
虽然可以通过指定"-Wa,-mimplicit-it=thumb"选项来告诉编译器识别隐式的IT指令，但是能在代码里面直接加上IT指令的话更好。
thumb指令集“条件执行”arm官网文档：
https://developer.arm.com/documentation/dui0473/m/condition-codes/conditional-execution-in-thumb-state
参考论坛帖子：
https://club.rt-thread.org/ask/question/433887.html
https://club.rt-thread.org/ask/question/4188.html
Signed-off-by: Mingrui Ren <[email protected]>
Diffstat (limited to 'src')
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