llvm dev - Sep 2009 - [LLVMdev] [codegen] how to generate x87 instructions using LLVM

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?


 Thanks
Simon

-- 
>From : Simon.Zhou at PPI, Fudan University
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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