gcc/testsuite/gcc.target/aarch64/sve/rsqrt_1.c

/* { dg-options "-Ofast -mlow-precision-sqrt" } */

#define DEF_LOOP(TYPE, FN)			\
  void						\
  test_##TYPE (TYPE *x, int n)			\
  {						\
    for (int i = 0; i < n; ++i)			\
      x[i] = (TYPE) 1 / FN (x[i]);		\
  }

#define TEST_ALL(T)			\
  T (_Float16, __builtin_sqrtf16)	\
  T (float, __builtin_sqrtf)		\
  T (double, __builtin_sqrt)

TEST_ALL (DEF_LOOP)

/* { dg-final { scan-assembler-not {\tfrsqrte\tz[0-9]+\.h} } } */
/* { dg-final { scan-assembler-not {\tfrsqrts\tz[0-9]+\.h} } } */

/* { dg-final { scan-assembler-times {\tfmul\tz[0-9]+\.s} 2 } } */
/* { dg-final { scan-assembler-times {\tfrsqrte\tz[0-9]+\.s} 1 } } */
/* { dg-final { scan-assembler-times {\tfrsqrts\tz[0-9]+\.s} 1 } } */

/* { dg-final { scan-assembler-times {\tfmul\tz[0-9]+\.d} 4 } } */
/* { dg-final { scan-assembler-times {\tfrsqrte\tz[0-9]+\.d} 1 } } */
/* { dg-final { scan-assembler-times {\tfrsqrts\tz[0-9]+\.d} 2 } } */