aarch64: Use type-qualified builtins for USUB[LW][2] Neon intrinsics

Declare unsigned type-qualified builtins and use them to implement
widening-subtract Neon intrinsics. This removes the need for many
casts in arm_neon.h.

gcc/ChangeLog:

2021-11-09  Jonathan Wright  <jonathan.wright@arm.com>

	* config/aarch64/aarch64-simd-builtins.def: Use BINOPU type
	qualifiers in generator macros for usub[lw][2] builtins.
	* config/aarch64/arm_neon.h (vsubl_s8): Remove unnecessary
	cast.
	(vsubl_s16): Likewise.
	(vsubl_s32): Likewise.
	(vsubl_u8): Use type-qualified builtin and remove casts.
	(vsubl_u16): Likewise.
	(vsubl_u32): Likewise.
	(vsubl_high_s8): Remove unnecessary cast.
	(vsubl_high_s16): Likewise.
	(vsubl_high_s32): Likewise.
	(vsubl_high_u8): Use type-qualified builtin and remove casts.
	(vsubl_high_u16): Likewise.
	(vsubl_high_u32): Likewise.
	(vsubw_s8): Remove unnecessary casts.
	(vsubw_s16): Likewise.
	(vsubw_s32): Likewise.
	(vsubw_u8): Use type-qualified builtin and remove casts.
	(vsubw_u16): Likewise.
	(vsubw_u32): Likewise.
	(vsubw_high_s8): Remove unnecessary cast.
	(vsubw_high_s16): Likewise.
	(vsubw_high_s32): Likewise.
	(vsubw_high_u8): Use type-qualified builtin and remove casts.
	(vsubw_high_u16): Likewise.
	(vsubw_high_u32): Likewise.

2 files changed, 28 insertions, 40 deletions

diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
index 879662e..463c2b5 100644
--- a/gcc/config/aarch64/aarch64-simd-builtins.def
+++ b/gcc/config/aarch64/aarch64-simd-builtins.def
@@ -160,21 +160,21 @@
   BUILTIN_VQW (BINOP, saddl2, 0, NONE)
   BUILTIN_VQW (BINOPU, uaddl2, 0, NONE)
   BUILTIN_VQW (BINOP, ssubl2, 0, NONE)
-  BUILTIN_VQW (BINOP, usubl2, 0, NONE)
+  BUILTIN_VQW (BINOPU, usubl2, 0, NONE)
   BUILTIN_VQW (BINOP, saddw2, 0, NONE)
   BUILTIN_VQW (BINOPU, uaddw2, 0, NONE)
   BUILTIN_VQW (BINOP, ssubw2, 0, NONE)
-  BUILTIN_VQW (BINOP, usubw2, 0, NONE)
+  BUILTIN_VQW (BINOPU, usubw2, 0, NONE)
   /* Implemented by aarch64_<ANY_EXTEND:su><ADDSUB:optab>l<mode>.  */
   BUILTIN_VD_BHSI (BINOP, saddl, 0, NONE)
   BUILTIN_VD_BHSI (BINOPU, uaddl, 0, NONE)
   BUILTIN_VD_BHSI (BINOP, ssubl, 0, NONE)
-  BUILTIN_VD_BHSI (BINOP, usubl, 0, NONE)
+  BUILTIN_VD_BHSI (BINOPU, usubl, 0, NONE)
   /* Implemented by aarch64_<ANY_EXTEND:su><ADDSUB:optab>w<mode>.  */
   BUILTIN_VD_BHSI (BINOP, saddw, 0, NONE)
   BUILTIN_VD_BHSI (BINOPU, uaddw, 0, NONE)
   BUILTIN_VD_BHSI (BINOP, ssubw, 0, NONE)
-  BUILTIN_VD_BHSI (BINOP, usubw, 0, NONE)
+  BUILTIN_VD_BHSI (BINOPU, usubw, 0, NONE)
   /* Implemented by aarch64_<sur>h<addsub><mode>.  */
   BUILTIN_VDQ_BHSI (BINOP, shadd, 0, NONE)
   BUILTIN_VDQ_BHSI (BINOP, shsub, 0, NONE)
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index 43a89b3..c1bf748 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -1765,180 +1765,168 @@ __extension__ extern __inline int16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_s8 (int8x8_t __a, int8x8_t __b)
 {
-  return (int16x8_t) __builtin_aarch64_ssublv8qi (__a, __b);
+  return __builtin_aarch64_ssublv8qi (__a, __b);
 }
 
 __extension__ extern __inline int32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_s16 (int16x4_t __a, int16x4_t __b)
 {
-  return (int32x4_t) __builtin_aarch64_ssublv4hi (__a, __b);
+  return __builtin_aarch64_ssublv4hi (__a, __b);
 }
 
 __extension__ extern __inline int64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_s32 (int32x2_t __a, int32x2_t __b)
 {
-  return (int64x2_t) __builtin_aarch64_ssublv2si (__a, __b);
+  return __builtin_aarch64_ssublv2si (__a, __b);
 }
 
 __extension__ extern __inline uint16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_u8 (uint8x8_t __a, uint8x8_t __b)
 {
-  return (uint16x8_t) __builtin_aarch64_usublv8qi ((int8x8_t) __a,
-						   (int8x8_t) __b);
+  return __builtin_aarch64_usublv8qi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_u16 (uint16x4_t __a, uint16x4_t __b)
 {
-  return (uint32x4_t) __builtin_aarch64_usublv4hi ((int16x4_t) __a,
-						   (int16x4_t) __b);
+  return __builtin_aarch64_usublv4hi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_u32 (uint32x2_t __a, uint32x2_t __b)
 {
-  return (uint64x2_t) __builtin_aarch64_usublv2si ((int32x2_t) __a,
-						   (int32x2_t) __b);
+  return __builtin_aarch64_usublv2si_uuu (__a, __b);
 }
 
 __extension__ extern __inline int16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_s8 (int8x16_t __a, int8x16_t __b)
 {
-  return (int16x8_t) __builtin_aarch64_ssubl2v16qi (__a, __b);
+  return __builtin_aarch64_ssubl2v16qi (__a, __b);
 }
 
 __extension__ extern __inline int32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_s16 (int16x8_t __a, int16x8_t __b)
 {
-  return (int32x4_t) __builtin_aarch64_ssubl2v8hi (__a, __b);
+  return __builtin_aarch64_ssubl2v8hi (__a, __b);
 }
 
 __extension__ extern __inline int64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_s32 (int32x4_t __a, int32x4_t __b)
 {
-  return (int64x2_t) __builtin_aarch64_ssubl2v4si (__a, __b);
+  return __builtin_aarch64_ssubl2v4si (__a, __b);
 }
 
 __extension__ extern __inline uint16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_u8 (uint8x16_t __a, uint8x16_t __b)
 {
-  return (uint16x8_t) __builtin_aarch64_usubl2v16qi ((int8x16_t) __a,
-						     (int8x16_t) __b);
+  return __builtin_aarch64_usubl2v16qi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_u16 (uint16x8_t __a, uint16x8_t __b)
 {
-  return (uint32x4_t) __builtin_aarch64_usubl2v8hi ((int16x8_t) __a,
-						    (int16x8_t) __b);
+  return __builtin_aarch64_usubl2v8hi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubl_high_u32 (uint32x4_t __a, uint32x4_t __b)
 {
-  return (uint64x2_t) __builtin_aarch64_usubl2v4si ((int32x4_t) __a,
-						    (int32x4_t) __b);
+  return __builtin_aarch64_usubl2v4si_uuu (__a, __b);
 }
 
 __extension__ extern __inline int16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_s8 (int16x8_t __a, int8x8_t __b)
 {
-  return (int16x8_t) __builtin_aarch64_ssubwv8qi (__a, __b);
+  return __builtin_aarch64_ssubwv8qi (__a, __b);
 }
 
 __extension__ extern __inline int32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_s16 (int32x4_t __a, int16x4_t __b)
 {
-  return (int32x4_t) __builtin_aarch64_ssubwv4hi (__a, __b);
+  return __builtin_aarch64_ssubwv4hi (__a, __b);
 }
 
 __extension__ extern __inline int64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_s32 (int64x2_t __a, int32x2_t __b)
 {
-  return (int64x2_t) __builtin_aarch64_ssubwv2si (__a, __b);
+  return __builtin_aarch64_ssubwv2si (__a, __b);
 }
 
 __extension__ extern __inline uint16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_u8 (uint16x8_t __a, uint8x8_t __b)
 {
-  return (uint16x8_t) __builtin_aarch64_usubwv8qi ((int16x8_t) __a,
-						   (int8x8_t) __b);
+  return __builtin_aarch64_usubwv8qi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_u16 (uint32x4_t __a, uint16x4_t __b)
 {
-  return (uint32x4_t) __builtin_aarch64_usubwv4hi ((int32x4_t) __a,
-						   (int16x4_t) __b);
+  return __builtin_aarch64_usubwv4hi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_u32 (uint64x2_t __a, uint32x2_t __b)
 {
-  return (uint64x2_t) __builtin_aarch64_usubwv2si ((int64x2_t) __a,
-						   (int32x2_t) __b);
+  return __builtin_aarch64_usubwv2si_uuu (__a, __b);
 }
 
 __extension__ extern __inline int16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_s8 (int16x8_t __a, int8x16_t __b)
 {
-  return (int16x8_t) __builtin_aarch64_ssubw2v16qi (__a, __b);
+  return __builtin_aarch64_ssubw2v16qi (__a, __b);
 }
 
 __extension__ extern __inline int32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_s16 (int32x4_t __a, int16x8_t __b)
 {
-  return (int32x4_t) __builtin_aarch64_ssubw2v8hi (__a, __b);
+  return __builtin_aarch64_ssubw2v8hi (__a, __b);
 }
 
 __extension__ extern __inline int64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_s32 (int64x2_t __a, int32x4_t __b)
 {
-  return (int64x2_t) __builtin_aarch64_ssubw2v4si (__a, __b);
+  return __builtin_aarch64_ssubw2v4si (__a, __b);
 }
 
 __extension__ extern __inline uint16x8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_u8 (uint16x8_t __a, uint8x16_t __b)
 {
-  return (uint16x8_t) __builtin_aarch64_usubw2v16qi ((int16x8_t) __a,
-						     (int8x16_t) __b);
+  return __builtin_aarch64_usubw2v16qi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_u16 (uint32x4_t __a, uint16x8_t __b)
 {
-  return (uint32x4_t) __builtin_aarch64_usubw2v8hi ((int32x4_t) __a,
-						    (int16x8_t) __b);
+  return __builtin_aarch64_usubw2v8hi_uuu (__a, __b);
 }
 
 __extension__ extern __inline uint64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vsubw_high_u32 (uint64x2_t __a, uint32x4_t __b)
 {
-  return (uint64x2_t) __builtin_aarch64_usubw2v4si ((int64x2_t) __a,
-						    (int32x4_t) __b);
+  return __builtin_aarch64_usubw2v4si_uuu (__a, __b);
 }
 
 __extension__ extern __inline int8x8_t