bscpkgs/test/compilers/suffle-c.nix

51 lines
1003 B
Nix
Raw Normal View History

{ stdenv, writeText, which, strace }:
let
shuffle_c = writeText "shuffle.c" ''
#include <stdio.h>
typedef int v4si __attribute__ ((vector_size (16)));
int main(void) {
v4si a = {1,2,3,4};
v4si b = {5,6,7,8};
v4si mask1 = {0,1,1,3};
v4si mask2 = {0,4,2,5};
v4si res;
#if defined(__GNUC__) && (__GNUC__ >= 7)
res = __builtin_shuffle (a, mask1); /* res is {1,2,2,4} */
res = __builtin_shuffle (a, b, mask2); /* res is {1,5,3,6} */
printf("%d %d %d %d\n", res[0], res[1], res[2], res[3]);
#endif
return 0;
}
'';
in
stdenv.mkDerivation rec {
version = "0.0.1";
name = "hello-c";
buildInputs = [ stdenv which strace ];
src = hello_c;
dontUnpack = true;
dontConfigure = true;
NIX_DEBUG = 0;
buildPhase = ''
cp $src hello.c
set -x
echo CC=$CC
which $CC
#strace -ff -e trace=execve -s99999999 $CC hello.c -o hello
$CC hello.c -o hello
./hello
set +x
'';
installPhase = ''
touch $out
'';
}