text: #ifndef _NPY_SIMD_H_
      #error "Not a standalone header"
  #endif
  
  #if defined(__GNUC__) && __GNUC__ <= 7
      /**
        * GCC <= 7 produces ambiguous warning caused by -Werror=maybe-uninitialized,
        * when certain intrinsics involved. `vec_ld` is one of them but it seemed to work fine,
        * and suppressing the warning wouldn't affect its functionality.
        */
      #pragma GCC diagnostic ignored "-Wuninitialized"
      #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
  #endif
  
  #define NPY_SIMD 128
  #define NPY_SIMD_WIDTH 16
  #define NPY_SIMD_F64 1
  #define NPY_SIMD_FMA3 1 // native support
  
  typedef __vector unsigned char      npyv_u8;
  typedef __vector signed char        npyv_s8;
  typedef __vector unsigned short     npyv_u16;
  typedef __vector signed short       npyv_s16;
  typedef __vector unsigned int       npyv_u32;
  typedef __vector signed int         npyv_s32;
  typedef __vector unsigned long long npyv_u64;
  typedef __vector signed long long   npyv_s64;
  typedef __vector float              npyv_f32;
  typedef __vector double             npyv_f64;
  
  typedef struct { npyv_u8  val[2]; } npyv_u8x2;
  typedef struct { npyv_s8  val[2]; } npyv_s8x2;
  typedef struct { npyv_u16 val[2]; } npyv_u16x2;
  typedef struct { npyv_s16 val[2]; } npyv_s16x2;
  typedef struct { npyv_u32 val[2]; } npyv_u32x2;
  typedef struct { npyv_s32 val[2]; } npyv_s32x2;
  typedef struct { npyv_u64 val[2]; } npyv_u64x2;
  typedef struct { npyv_s64 val[2]; } npyv_s64x2;
  typedef struct { npyv_f32 val[2]; } npyv_f32x2;
  typedef struct { npyv_f64 val[2]; } npyv_f64x2;
  
  typedef struct { npyv_u8  val[3]; } npyv_u8x3;
  typedef struct { npyv_s8  val[3]; } npyv_s8x3;
  typedef struct { npyv_u16 val[3]; } npyv_u16x3;
  typedef struct { npyv_s16 val[3]; } npyv_s16x3;
  typedef struct { npyv_u32 val[3]; } npyv_u32x3;
  typedef struct { npyv_s32 val[3]; } npyv_s32x3;
  typedef struct { npyv_u64 val[3]; } npyv_u64x3;
  typedef struct { npyv_s64 val[3]; } npyv_s64x3;
  typedef struct { npyv_f32 val[3]; } npyv_f32x3;
  typedef struct { npyv_f64 val[3]; } npyv_f64x3;
  
  #define npyv_nlanes_u8  16
  #define npyv_nlanes_s8  16
  #define npyv_nlanes_u16 8
  #define npyv_nlanes_s16 8
  #define npyv_nlanes_u32 4
  #define npyv_nlanes_s32 4
  #define npyv_nlanes_u64 2
  #define npyv_nlanes_s64 2
  #define npyv_nlanes_f32 4
  #define npyv_nlanes_f64 2
  
  // using __bool with typdef cause ambiguous errors
  #define npyv_b8  __vector __bool char
  #define npyv_b16 __vector __bool short
  #define npyv_b32 __vector __bool int
  #define npyv_b64 __vector __bool long long
  
  #include "memory.h"
  #include "misc.h"
  #include "reorder.h"
  #include "operators.h"
  #include "conversion.h"
  #include "arithmetic.h"
  #include "math.h"
  