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#![feature(rustc_attrs, repr_simd, aarch64_target_feature, platform_intrinsics)] #[repr(simd)] pub struct uint8x8_t(pub u8, pub u8, pub u8, pub u8, pub u8, pub u8, pub u8, pub u8); #[repr(simd)] pub struct uint64x2_t(pub u64, pub u64); #[repr(simd)] pub struct uint64x1_t(pub u64); #[repr(simd)] pub struct uint16x8_t(pub u16, pub u16, pub u16, pub u16, pub u16, pub u16, pub u16, pub u16); #[repr(simd)] pub struct uint32x4_t(pub u32, pub u32, pub u32, pub u32); use std::hint::unreachable_unchecked; extern "platform-intrinsic" { fn simd_extract<T, E>(x: T, i: u32) -> E; } //immediate value: 0:7 #[allow(unused)] macro_rules! constify_imm3 { ($imm8:expr, $expand:ident) => { #[allow(overflowing_literals)] match ($imm8) & 0b111 { 0 => $expand!(0), 1 => $expand!(1), 2 => $expand!(2), 3 => $expand!(3), 4 => $expand!(4), 5 => $expand!(5), 6 => $expand!(6), _ => $expand!(7), } }; } //immediate value: 0:31 #[allow(unused)] macro_rules! constify_imm5 { ($imm8:expr, $expand:ident) => { #[allow(overflowing_literals)] match ($imm8) & 0b1_1111 { 0 => $expand!(0), 1 => $expand!(1), 2 => $expand!(2), 3 => $expand!(3), 4 => $expand!(4), 5 => $expand!(5), 6 => $expand!(6), 7 => $expand!(7), 8 => $expand!(8), 9 => $expand!(9), 10 => $expand!(10), 11 => $expand!(11), 12 => $expand!(12), 13 => $expand!(13), 14 => $expand!(14), 15 => $expand!(15), 16 => $expand!(16), 17 => $expand!(17), 18 => $expand!(18), 19 => $expand!(19), 20 => $expand!(20), 21 => $expand!(21), 22 => $expand!(22), 23 => $expand!(23), 24 => $expand!(24), 25 => $expand!(25), 26 => $expand!(26), 27 => $expand!(27), 28 => $expand!(28), 29 => $expand!(29), 30 => $expand!(30), _ => $expand!(31), } }; } #[allow(unused)] macro_rules! arm_vget_lane { ($name:ident, $from:ty, $to:ty, $lanes:literal) => { #[cfg(target_feature = "neon")] #[cfg(target_arch = "aarch64")] pub unsafe fn $name(v: $from, lane: i32) -> $to { macro_rules! call { ($imm3:expr) => { if ($imm3) < 0 || ($imm3) > ($lanes - 1) { unreachable_unchecked() } else { simd_extract(v, $imm3) } } } constify_imm5!(lane, call) } }; } // uint8_t vget_lane_u8 (uint8x8_t v, const int lane) arm_vget_lane!(vget_lane_u8_1, uint8x8_t, u8, 8); #[cfg(target_arch = "aarch64")] #[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))] #[rustc_args_required_const(1)] pub unsafe fn vget_lane_u8_2(v: uint8x8_t, imm5: i32) -> u8 { if (imm5) < 0 || (imm5) > 7 { unreachable_unchecked() } let imm5 = (imm5 & 7) as u32; simd_extract(v, imm5) } // uint64_t vget_lane_u64 (uint64x1_t v, const int lane) arm_vget_lane!(vget_lane_u64_1, uint64x1_t, u64, 1); #[cfg(target_arch = "aarch64")] #[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))] #[rustc_args_required_const(1)] pub unsafe fn vget_lane_u64_2(v: uint64x1_t, imm5: i32) -> u64 { if (imm5) < 0 || (imm5) > 0 { unreachable_unchecked() } let imm5 = (imm5 & 0) as u32; simd_extract(v, imm5) } // uint16_t vgetq_lane_u16 (uint16x8_t v, const int lane) arm_vget_lane!(vgetq_lane_u16_1, uint16x8_t, u16, 8); #[cfg(target_feature = "neon")] #[cfg(target_arch = "aarch64")] #[rustc_args_required_const(1)] pub unsafe fn vgetq_lane_u16_2(v: uint16x8_t, imm5: i32) -> u16 { if (imm5) < 0 || (imm5) > 8 { unreachable_unchecked() } let imm5 = (imm5 & 7) as u32; simd_extract(v, imm5) } // uint32_t vgetq_lane_u32 (uint32x4_t v, const int lane)/ arm_vget_lane!(vgetq_lane_u32_1, uint32x4_t, u32, 4); #[cfg(target_feature = "neon")] #[cfg(target_arch = "aarch64")] #[rustc_args_required_const(1)] pub unsafe fn vgetq_lane_u32_2(v: uint32x4_t, imm5: i32) -> u32 { if (imm5) < 0 || (imm5) > 3 { unreachable_unchecked() } let imm5 = (imm5 & 3) as u32; simd_extract(v, imm5) } #[cfg(target_feature = "neon")] #[cfg(target_arch = "aarch64")] pub unsafe fn vgetq_lane_u32_3(v: uint32x4_t, imm5: i32) -> u32 { if (imm5) < 0 || (imm5) > 3 { unreachable_unchecked() } match imm5 & 3 { 0 => simd_extract(v, 0), 1 => simd_extract(v, 1), 2 => simd_extract(v, 2), _ => simd_extract(v, 3), } } // uint64_t vgetq_lane_u64 (uint64x2_t v, const int lane) arm_vget_lane!(vgetq_lane_u64_1, uint64x2_t, u64, 2); #[cfg(target_feature = "neon")] #[cfg(target_arch = "aarch64")] #[rustc_args_required_const(1)] pub unsafe fn vgetq_lane_u64_2(v: uint64x2_t, imm5: i32) -> u64 { let imm5 = (imm5 & 1) as u32; simd_extract(v, imm5) }
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