NEON 程序集无法在 Xcode 4.3.2 中为 iOS 构建 [英] NEON assembly fail to build for iOS in Xcode 4.3.2

问题描述

我有一个代码库，可以在所有其他 NEON 编译器、ndk-build、RVDS 等中正常编译，但在 Xcode 下，我调用的每条 NEON 指令都会出现错误错误指令".基本上好像没有检测到 NEON.

我正在尝试构建一个静态库，我进入了新项目，选择了 Cocoa Touch 静态库，然后添加了我现有的文件.

我正在阅读的所有内容都表明 NEON 应该已经启用.我删除了对 armv6 的所有引用，并针对 iOS 5.1

此外，有问题的代码都包含在.s"文件中定义的例程——纯汇编.我没有使用内在方法调用.

似乎编译器正在对整个文件进行调试...

未知伪操作:.cpu

它列出了所有其他设置，如 .fpu 等

这是我当前的设置:

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解决方案

在我在上一个回答中提到的 as 工具也让我的语法窒息之后，我意识到一定还有其他事情发生.

>

我遵循了这篇文章底部的指导方针http://www.shervinemami.info/armAssembly.html#template

我需要做出的改变是:

1. 将我的指令全部转换为小写
2. 使用命名指令与 mach-o 兼容(解决链接器问题)

I have a code base which compiles fine in all other NEON compilers, ndk-build, RVDS, etc, but under Xcode I get the error "bad instruction" for every NEON instruction I call. It basically seems like NEON is not detected.

I am attempting to build a static library, I went to New Project, selected Cocoa Touch Static Library, then added my existing files.

Everything I'm reading indicates that NEON should be already enabled. I removed all references to armv6, and am targeting iOS 5.1

Also the code in question is all contained as routines defined in ".s" files -- pure assembly. I am not using the intrinsics method calls.

It seems like the compiler is barfing on the whole file...

Unknown pseudo-op: .cpu

It lists all of the other settings, like .fpu, etc

Here are my current settings:

_{(source: wasteonline.net)}

_{(source: wasteonline.net)}

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解决方案

After the as tool I mentioned in my last answer turned out to be choking on my syntax as well, I realized there must be something else going on.

I followed the guidelines on the bottom of this post http://www.shervinemami.info/armAssembly.html#template

The changes I needed to make were:

1. converted my instructions to all lower case
2. use the naming directives to be compatible with mach-o (solved linker problems)

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