gcc/testsuite/gcc.target/aarch64/mnegl-1.c

/* { dg-do compile } */
/* { dg-options "-O2" } */

long long r;

void test_signed (int a, int b)
{
  /* { dg-final { scan-assembler "smnegl\tx\[0-9\]*, w\[0-9\]*, w\[0-9\]*\n" } } */
  r = (-((long long) a)) * ((long long) b);
}

void test_unsigned (unsigned int a, unsigned int b)
{
  /* { dg-final { scan-assembler "umnegl\tx\[0-9\]*, w\[0-9\]*, w\[0-9\]*\n" } } */
  r = (-((long long) a)) * ((long long) b);
}