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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks andrew for the answer.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would like to generate code for Cortex-A9 that don’t use neon for fp computation but vfpv3 –d16. I’ve tried some combination of –mattr=+neon,-neonfp,+vfp3,+d16 but couldn’t get “.fpu vfpv3-d16” directive generated in assembly file. Do you know how to make it happen ?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Seb<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Andrew Trick [mailto:atrick@apple.com] <br><b>Sent:</b> Saturday, July 28, 2012 2:46 AM<br><b>To:</b> Sebastien DELDON-GNB<br><b>Cc:</b> llvmdev@cs.uiuc.edu<br><b>Subject:</b> Re: [LLVMdev] Question about arm thumb2 code generation<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Jul 27, 2012, at 9:04 AM, Sebastien DELDON-GNB <<a href="mailto:sebastien.deldon@st.com">sebastien.deldon@st.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Hi all,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Does llc –march=thumb –mcpu=cortex-a9 enable generation of thumb2 code for armv7 ?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>That's how I usually do it. Somewhere in the target description we associate a9 with -mattr=+thumb2.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>There are plenty of other ways to get the same result, and it's all very confusing and opaque. Don't ask me what triples are valid. I usually verify that I have the right command line by staring at the disassembly until I'm convinced.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>One good thing about llc (unlike other drivers... *cough*) is that the option values are actually discoverable!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>llc --version gives you -march= values.<o:p></o:p></p></div><div><p class=MsoNormal>llc -mcpu=help<o:p></o:p></p></div><div><p class=MsoNormal>llc -mattr=help<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-Andy<o:p></o:p></p></div></div></div></body></html>