gcc/testsuite/gcc.target/aarch64/simd/vfma_f64.c

/* Test the vfma_f64 AArch64 SIMD intrinsic.  */

/* { dg-do run } */
/* { dg-options "-save-temps -O3" } */

#include "arm_neon.h"

#define EPS 1.0e-15

#define INHIB_OPT(x) asm volatile ("mov %d0, %1.d[0]"	\
				   : "=w"(x)		\
				   : "w"(x)		\
				   : /* No clobbers. */);

extern void abort (void);

int
main (void)
{
  float64x1_t arg1;
  float64x1_t arg2;
  float64x1_t arg3;

  float64_t expected;
  float64_t actual;

  arg1 = vcreate_f64 (0x3fe3955382d35b0eULL);
  arg2 = vcreate_f64 (0x3fa88480812d6670ULL);
  arg3 = vcreate_f64 (0x3fd5791ae2a92572ULL);

  INHIB_OPT (arg1);
  INHIB_OPT (arg2);
  INHIB_OPT (arg3);

  expected = 0.6280448184360076;
  actual = vget_lane_f64 (vfma_f64 (arg1, arg2, arg3), 0);

  if (__builtin_fabs (expected - actual) > EPS)
    abort ();

  return 0;
}

/* { dg-final { scan-assembler-times "fmadd\[ \t\]+\[dD\]\[0-9\]+, ?\[dD\]\[0-9\]+, ?\[dD\]\[0-9\]+, ?\[dD\]\[0-9\]+\n" 1 } } */