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</o:shapelayout></xml><![endif]--></head><body lang=EN-IE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>I have written many builtins for our SHAVE processor which bind directly to our instructions, and making instructions that are not easily selectable by the compiler available to the programmer.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>The majority of these are straight-forward enough, taking a small number pf input operands and returning a single result; for example ‘</span><span style='font-size:12.0pt;font-family:"Courier New"'>int __builtin_shave_mul(int, int)</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ might map onto a simple multiple instruction that takes two input integer operands in registers, and returns a single integer result in another register.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>However, I have a small number instructions that have two output operands, each in a separate register. I would like to provide access to these instructions using the builtins approach. This is easy enough to express in LLVM IR, but I have not been able to figure out how this can be presented in a C or C++ binding.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Is there a pattern for doing this kind of thing that I haven’t discovered, or is it simply something that cannot be expressed using the C binding to the builtins?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'> MartinO (Movidius Ltd.)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p></div></body></html>