[LLVMdev] [codegen] how to generate x87 instructions using LLVM
Chris Lattner
clattner at apple.com
Wed Sep 16 08:50:39 PDT 2009
On Sep 16, 2009, at 1:13 AM, Simon Zhou wrote:
> Hi All
>
> I am a greenhand for LLVM.
>
> I find the LLVM generate SSE instrctions for floating pointing
> computation, is there some method or options to let it generate x87
> instructions?
Are you using the low level llvm tools like 'llc'? If so, pass -
mattr=-sse to disable SSE codegen, for example:
llc ~/fp.bc -o - -mattr=-sse
-Chris
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