[PATCH] aarch64: Use type-qualified builtins for vget_low/high intrinsics

Richard Sandiford richard.sandiford@arm.com
Thu Nov 11 10:55:43 GMT 2021


Jonathan Wright <Jonathan.Wright@arm.com> writes:
> Hi,
>
> This patch declares unsigned and polynomial type-qualified builtins for
> vget_low_*/vget_high_* Neon intrinsics. Using these builtins removes
> the need for many casts in arm_neon.h.
>
> Bootstrapped and regression tested on aarch64-none-linux-gnu - no
> issues.
>
> Ok for master?
>
> Thanks,
> Jonathan
>
> ---
>
> gcc/ChangeLog:
>
> 2021-11-10  Jonathan Wright  <jonathan.wright@arm.com>
>
>         * config/aarch64/aarch64-builtins.c (TYPES_UNOPP): Define.
>         * config/aarch64/aarch64-simd-builtins.def: Declare type-
>         qualified builtins for vget_low/high.
>         * config/aarch64/arm_neon.h (vget_low_p8): Use type-qualified
>         builtin and remove casts.
>         (vget_low_p16): Likewise.
>         (vget_low_p64): Likewise.
>         (vget_low_u8): Likewise.
>         (vget_low_u16): Likewise.
>         (vget_low_u32): Likewise.
>         (vget_low_u64): Likewise.
>         (vget_high_p8): Likewise.
>         (vget_high_p16): Likewise.
>         (vget_high_p64): Likewise.
>         (vget_high_u8): Likewise.
>         (vget_high_u16): Likewise.
>         (vget_high_u32): Likewise.
>         (vget_high_u64): Likewise.
>         * config/aarch64/iterators.md (VQ_P): New mode iterator.
>
> diff --git a/gcc/config/aarch64/aarch64-builtins.c b/gcc/config/aarch64/aarch64-builtins.c
> index 7abf8747b69591815068709af42598c47d73269e..3edc2f55e571c1a34a24add842c47b130d900cf6 100644
> --- a/gcc/config/aarch64/aarch64-builtins.c
> +++ b/gcc/config/aarch64/aarch64-builtins.c
> @@ -204,6 +204,10 @@ aarch64_types_unopu_qualifiers[SIMD_MAX_BUILTIN_ARGS]
>    = { qualifier_unsigned, qualifier_unsigned };
>  #define TYPES_UNOPU (aarch64_types_unopu_qualifiers)
>  static enum aarch64_type_qualifiers
> +aarch64_types_unopp_qualifiers[SIMD_MAX_BUILTIN_ARGS]
> +  = { qualifier_poly, qualifier_poly };
> +#define TYPES_UNOPP (aarch64_types_unopp_qualifiers)
> +static enum aarch64_type_qualifiers
>  aarch64_types_unopus_qualifiers[SIMD_MAX_BUILTIN_ARGS]
>    = { qualifier_unsigned, qualifier_none };
>  #define TYPES_UNOPUS (aarch64_types_unopus_qualifiers)
> diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
> index ab5f3a098f2047d0f1ba933f4418609678102c3d..08d6bbe635424217687a429709c696c3282feea0 100644
> --- a/gcc/config/aarch64/aarch64-simd-builtins.def
> +++ b/gcc/config/aarch64/aarch64-simd-builtins.def
> @@ -62,8 +62,12 @@
>  
>    /* Implemented by aarch64_get_low<mode>.  */
>    BUILTIN_VQMOV (UNOP, get_low, 0, AUTO_FP)
> +  BUILTIN_VQ_I (UNOPU, get_low, 0, NONE)
> +  BUILTIN_VQ_P (UNOPP, get_low, 0, NONE)
>    /* Implemented by aarch64_get_high<mode>.  */
>    BUILTIN_VQMOV (UNOP, get_high, 0, AUTO_FP)
> +  BUILTIN_VQ_I (UNOPU, get_high, 0, NONE)
> +  BUILTIN_VQ_P (UNOPP, get_high, 0, NONE)
>  
>    /* Implemented by aarch64_<sur>q<r>shl<mode>.  */
>    BUILTIN_VSDQ_I (BINOP, sqshl, 0, NONE)
> diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
> index c374e90f31546886a519ba270113ccedd4ca7abf..6137d53297863aaad0cad31c7eb6eef24bc4316a 100644
> --- a/gcc/config/aarch64/arm_neon.h
> +++ b/gcc/config/aarch64/arm_neon.h
> @@ -5799,21 +5799,21 @@ __extension__ extern __inline poly8x8_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_p8 (poly8x16_t __a)
>  {
> -  return (poly8x8_t) __builtin_aarch64_get_lowv16qi ((int8x16_t) __a);
> +  return __builtin_aarch64_get_lowv16qi_pp (__a);
>  }
>  
>  __extension__ extern __inline poly16x4_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_p16 (poly16x8_t __a)
>  {
> -  return (poly16x4_t) __builtin_aarch64_get_lowv8hi ((int16x8_t) __a);
> +  return __builtin_aarch64_get_lowv8hi_pp (__a);
>  }
>  
>  __extension__ extern __inline poly64x1_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_p64 (poly64x2_t __a)
>  {
> -  return (poly64x1_t) __builtin_aarch64_get_lowv2di ((int64x2_t) __a);
> +  return (poly64x1_t) __builtin_aarch64_get_lowv2di_pp (__a);

I think we could define the intrinsics such that the return cast
isn't needed either.  poly64x1_t has the same mode (DI) as the
scalar type, so it should “just” be a case of using qualifiers
to pick the x1 vector type instead of the scalar type.

Thanks,
Richard

>  }
>  
>  __extension__ extern __inline int8x8_t
> @@ -5848,28 +5848,28 @@ __extension__ extern __inline uint8x8_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_u8 (uint8x16_t __a)
>  {
> -  return (uint8x8_t) __builtin_aarch64_get_lowv16qi ((int8x16_t) __a);
> +  return __builtin_aarch64_get_lowv16qi_uu (__a);
>  }
>  
>  __extension__ extern __inline uint16x4_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_u16 (uint16x8_t __a)
>  {
> -  return (uint16x4_t) __builtin_aarch64_get_lowv8hi ((int16x8_t) __a);
> +  return __builtin_aarch64_get_lowv8hi_uu (__a);
>  }
>  
>  __extension__ extern __inline uint32x2_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_u32 (uint32x4_t __a)
>  {
> -  return (uint32x2_t) __builtin_aarch64_get_lowv4si ((int32x4_t) __a);
> +  return __builtin_aarch64_get_lowv4si_uu (__a);
>  }
>  
>  __extension__ extern __inline uint64x1_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_low_u64 (uint64x2_t __a)
>  {
> -  return (uint64x1_t) {__builtin_aarch64_get_lowv2di ((int64x2_t) __a)};
> +  return (uint64x1_t) {__builtin_aarch64_get_lowv2di_uu (__a)};
>  }
>  
>  __extension__ extern __inline float16x4_t
> @@ -5897,21 +5897,21 @@ __extension__ extern __inline poly8x8_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_p8 (poly8x16_t __a)
>  {
> -  return (poly8x8_t) __builtin_aarch64_get_highv16qi ((int8x16_t) __a);
> +  return __builtin_aarch64_get_highv16qi_pp (__a);
>  }
>  
>  __extension__ extern __inline poly16x4_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_p16 (poly16x8_t __a)
>  {
> -  return (poly16x4_t) __builtin_aarch64_get_highv8hi ((int16x8_t) __a);
> +  return __builtin_aarch64_get_highv8hi_pp (__a);
>  }
>  
>  __extension__ extern __inline poly64x1_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_p64 (poly64x2_t __a)
>  {
> -  return (poly64x1_t) __builtin_aarch64_get_highv2di ((int64x2_t) __a);
> +  return (poly64x1_t) __builtin_aarch64_get_highv2di_pp (__a);
>  }
>  
>  __extension__ extern __inline int8x8_t
> @@ -5946,28 +5946,28 @@ __extension__ extern __inline uint8x8_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_u8 (uint8x16_t __a)
>  {
> -  return (uint8x8_t) __builtin_aarch64_get_highv16qi ((int8x16_t) __a);
> +  return __builtin_aarch64_get_highv16qi_uu (__a);
>  }
>  
>  __extension__ extern __inline uint16x4_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_u16 (uint16x8_t __a)
>  {
> -  return (uint16x4_t) __builtin_aarch64_get_highv8hi ((int16x8_t) __a);
> +  return __builtin_aarch64_get_highv8hi_uu (__a);
>  }
>  
>  __extension__ extern __inline uint32x2_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_u32 (uint32x4_t __a)
>  {
> -  return (uint32x2_t) __builtin_aarch64_get_highv4si ((int32x4_t) __a);
> +  return __builtin_aarch64_get_highv4si_uu (__a);
>  }
>  
>  __extension__ extern __inline uint64x1_t
>  __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
>  vget_high_u64 (uint64x2_t __a)
>  {
> -  return (uint64x1_t) {__builtin_aarch64_get_highv2di ((int64x2_t) __a)};
> +  return (uint64x1_t) {__builtin_aarch64_get_highv2di_uu (__a)};
>  }
>  
>  
> diff --git a/gcc/config/aarch64/iterators.md b/gcc/config/aarch64/iterators.md
> index 1598e19751ff5112a072118a629755272f48e83b..ae32d6b1756d1dd78c28844987c563424a726617 100644
> --- a/gcc/config/aarch64/iterators.md
> +++ b/gcc/config/aarch64/iterators.md
> @@ -122,6 +122,9 @@
>  ;; Quad integer vector modes.
>  (define_mode_iterator VQ_I [V16QI V8HI V4SI V2DI])
>  
> +;; Quad vector polynomial modes.
> +(define_mode_iterator VQ_P [V16QI V8HI V2DI])
> +
>  ;; VQ without 2 element modes.
>  (define_mode_iterator VQ_NO2E [V16QI V8HI V4SI V8HF V4SF V8BF])
>  


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