From llvm-dev  Sat Apr 09 10:13:15 2011
From: Gunther Piez <gpiez () web ! de>
Date: Sat, 09 Apr 2011 10:13:15 +0000
To: llvm-dev
Subject: [LLVMdev] bsr not implemented?
Message-Id: <4DA0313B.7010501 () web ! de>
X-MARC-Message: https://marc.info/?l=llvm-dev&m=130235846620138

Hello,

just trying to use the dragonegg plugin with gcc on my project.
Unfortunately I get an

/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.5.2/include/ia32intrin.h:170:35:
error: unsupported target builtin ‘__builtin_ia32_bsrdi’ used

error. I use (and need) the "bsr" (bit scan reverse) instruction. So it
seems it isn't implemented (yet). Can I safely use gcc inline assembly
instead? Are the some preprocessor macros defined while using dragonegg
so that I can conditionally compile?

- Gunther
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