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2739 :: register pragma

• valex (orginal) [2017-01-20T19:05:31+01:00] view original

  I didn't find examples of use register pragma. http://nim-lang.org/docs/manual.html#pragmas-register-pragma Where it is possible to find more detail information (syntax of use) on it?

  Stefan_Salewski thanks. I tried this option. Nim makes the following (C) code: NI register foo;

  From gcc doc: https://gcc.gnu.org/onlinedocs/gcc/Global-Register-Variables.html#Global-Register-Variables

  shall be: register int foo asm ("r12");

  Where insert name and why different syntax?

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• Stefan_Salewski (orginal) [2017-01-20T20:16:45+01:00] view original

  Have you tried something like

  var mycounter {.register.} = 0
  Run

  You can check the C sources if it is applied, but as the manual says, in nearly all cases the (C) compiler knows better.

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• Araq (orginal) [2017-01-21T06:10:43+01:00] view original

  Sure, instead of replying, edit your original message. If you don't want an answer, why not? ;-)

  register int foo asm ("r12"); is not valid C, so that's why. But of course Nim has a solution for this:

  var x {.codegenDecl: "$# $# asm(\"r12\")".}: int
  Run

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• valex (orginal) [2017-01-21T08:12:01+01:00] view original

  Araq thanks. This nim code works:

  
  var x {.codegenDecl: "register $# $# asm(\"r12\")".}: int
  Run

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