RE: [MinGW-dvlpr] Returning LARGE_INTEGER values

[Hartmut B. <har...@te...>]

> -----Original Message-----
> From: min...@li... 
> [mailto:min...@li...] On Behalf Of 
> Danny Smith
> Sent: Tuesday, February 04, 2003 11:48 PM
> To: min...@li...
> Subject: Re: [MinGW-dvlpr] Returning LARGE_INTEGER values
> 
> 
> I ve rebuilt gcc 3.4 with this addition to cygwin.h:
> 
> /* MSVC returns structs of up to 8 bytes via registers. */
> #undef RETURN_IN_MEMORY
> #define RETURN_IN_MEMORY(TYPE) \
>   (TYPE_MODE (TYPE) == BLKmode || \
>      (AGGREGATE_TYPE_P (TYPE) && int_size_in_bytes(TYPE) > 8 ))
> 
> And this is result of testcase:
> 
> Source:
> /* large.c */
> #include  <windows.h>
> 
> LARGE_INTEGER WINAPI LargeIntegerAdd (LARGE_INTEGER, LARGE_INTEGER);
> LARGE_INTEGER WINAPI
> MyLargeIntegerAdd (LARGE_INTEGER i1, LARGE_INTEGER i2)
> {
> LARGE_INTEGER res;
> res.QuadPart = i1.QuadPart + i2.QuadPart;
> return res;
> }
> 
> gcc -S large.c
> 
>  .file "large.c"
>  .text
> .globl _MyLargeIntegerAdd@16
>  .def _MyLargeIntegerAdd@16; .scl 2; .type 32; .endef
> _MyLargeIntegerAdd@16:
>  pushl %ebp
>  movl %esp, %ebp
>  subl $24, %esp
>  movl 8(%ebp), %eax
>  movl 12(%ebp), %edx
>  movl %eax, -8(%ebp)
>  movl %edx, -4(%ebp)
>  movl 16(%ebp), %eax
>  movl 20(%ebp), %edx
>  movl %eax, -16(%ebp)
>  movl %edx, -12(%ebp)
>  movl -16(%ebp), %eax
>  movl -12(%ebp), %edx
>  addl -8(%ebp), %eax
>  adcl -4(%ebp), %edx
>  movl %eax, -24(%ebp)
>  movl %edx, -20(%ebp)
>  movl -24(%ebp), %eax
>  movl -20(%ebp), %edx
>  leave
>  ret $16
> 
> Looks like what you want. Can you comapre with MS output and confirm?
> 
> Danny 
> 

That's what I need. The LARGE_INTEGER return value of the function
MyLargeIntegerAdd is returned in edx:eax.

- Hartmut