Re: Macro To Generate Inline Assembly

In article
<cd16a402-7f07-4367-ad9d-45297e2c0325@[EMAIL PROTECTED]
>, Le
Chaud Lapin <jaibuduvin@[EMAIL PROTECTED]
> wrote:

> 
> There is also the matter of superfluous instructions being  added even
> to the inline function,
     All this depends on the compiler and what it does with inline and
asm:)
    inline std::uint32_t f()
    {
    const std::uint32_t a= ~0;
    const std::uint16_t b= ~0;
    return a/b;
    }

    produces:
       lis  r2,1         // load high word of r2 with 1
       add r2,r2,1 // r2 = r2 + 1

  no pre-call code and only a move to memory on exit since I tested it
witn
    void g() {std::uint_32_t x = f();}

    so what is the point??  low level code depends on the compiler and
definitely the hardware involved.
      BTW in 10 years I have written only one assembler routine and it
was to swap bytes converting the endianness of a binary file of 16 bit
ints, using a processor specific instruction that did this 32bits at a
time.

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