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IFORT and Assembly

jvoo
Beginner
‎11-18-2007 10:17 PM
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Is it possible to call subroutines/functions written in x86 assembly from Fortran? There seems to be plenty of info on how to do this with C++ but I haven't been able to find much for Fortran. Thanks.
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TimP
Honored Contributor III
‎11-19-2007 05:59 AM
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You could use ISO C binding if you want to make your assembly function with a C interface. Then you can use mixed C, C++, and inline asm. Maybe you consider it cheating, but the obvious way for assembly source is to write a Fortran skeleton for your function, compile with -S, fill it in, and compile again with Fortran compiler.
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Steven_L_Intel1
Employee
‎11-19-2007 09:32 AM
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It's really the same as calling from C. Just make sure the routine name has the proper case and underscore decoration, and understand that character lengths are passed at the end of the argument list.
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jvoo
Beginner
‎11-19-2007 11:10 AM
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Great!, Thanks!!
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