add.c:6: incompatible types in assignment

add.c:6: incompatible types in assignment

[Ankit Jain]

the program gives error at line 6

add.c:6: incompatible types in assignment
   
  1 #include<stdio.h>
      2 #include<inttypes.h>
      3 int main()
      4 {
      5         uint8_t
a[8]={1,2,3,4,5,6,7,8},b[8]={1,2,3,4,5,6,7,8},i;
      6         asm("movq (%1), %%mm0 \n"
      7             "paddb (%0), %%mm0 \n"
      8             "movq  %%mm0, (%0) \n"
      9                 :"=r"(b)
     10                 :"r"(a)
     11                 :"%mm0"
     12         );
     13         for(i=0;i<8;i++)
     14         printf("%d ",b[i]);
     15         return 0;
     16 }


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Re: add.c:6: incompatible types in assignment

[Frederic Marmond]

you mistake about data and pointer format.

 Try somehing like this

 #include<stdio.h>
 #include<inttypes.h>
 typedef union
 {
         char        bytes[8];
         long long u64;
 }GoodType;
 int main()
 {
          uint8_t a[8]={1,2,3,4,5,6,7,8},b[8]={1,2,3,4,5,6,7,8},i;
          GoodType fooBar;
          fooBar.bytes[0]=1;
          fooBar.bytes[1]=2;
          fooBar.bytes[2]=3;
          fooBar.bytes[3]=4;
          fooBar.bytes[4]=5;
          fooBar.bytes[5]=6;
          fooBar.bytes[6]=7;
          fooBar.bytes[7]=8;
          asm("movq (%1), %%mm0 \n"
              "paddb (%0), %%mm0 \n"
              "movq  %%mm0, (%0) \n"
                  :"=r"(fooBar)
                  :"r"(a)
                  :"%mm0"
          );
          for(i=0;i<8;i++)
          printf("%d ",fooBar.bytes[i]);
          return 0;
 }

 Fred


Selon Ankit Jain <ankitjain1580@yahoo.com>:

> the program gives error at line 6
>
> add.c:6: incompatible types in assignment
>
>   1 #include<stdio.h>
>       2 #include<inttypes.h>
>       3 int main()
>       4 {
>       5         uint8_t
> a[8]={1,2,3,4,5,6,7,8},b[8]={1,2,3,4,5,6,7,8},i;
>       6         asm("movq (%1), %%mm0 \n"
>       7             "paddb (%0), %%mm0 \n"
>       8             "movq  %%mm0, (%0) \n"
>       9                 :"=r"(b)
>      10                 :"r"(a)
>      11                 :"%mm0"
>      12         );
>      13         for(i=0;i<8;i++)
>      14         printf("%d ",b[i]);
>      15         return 0;
>      16 }
>
>
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--
Fred Marmond