| /* |
| * Copyright (c) 2015 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef included_vector_neon_h |
| #define included_vector_neon_h |
| #include <arm_neon.h> |
| |
| /* Dummy. Aid making uniform macros */ |
| #define vreinterpretq_u8_u8(a) a |
| /* Implement the missing intrinsics to make uniform macros */ |
| #define vminvq_u64(x) \ |
| ({ \ |
| u64 x0 = vgetq_lane_u64(x, 0); \ |
| u64 x1 = vgetq_lane_u64(x, 1); \ |
| x0 < x1 ? x0 : x1; \ |
| }) |
| |
| /* Converts all ones/zeros compare mask to bitmap. */ |
| always_inline u32 |
| u8x16_compare_byte_mask (u8x16 v) |
| { |
| uint8x16_t mask = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, |
| 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 |
| }; |
| /* v --> [0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0x00, ... ] */ |
| uint8x16_t x = vandq_u8 (v, mask); |
| /* after v & mask, |
| * x --> [0x01, 0x00, 0x04, 0x08, 0x10, 0x00, 0x40, 0x00, ... ] */ |
| uint64x2_t x64 = vpaddlq_u32 (vpaddlq_u16 (vpaddlq_u8 (x))); |
| /* after merge, x64 --> [0x5D, 0x.. ] */ |
| return (u32) (vgetq_lane_u64 (x64, 0) + (vgetq_lane_u64 (x64, 1) << 8)); |
| } |
| |
| /* *INDENT-OFF* */ |
| #define foreach_neon_vec128i \ |
| _(i,8,16,s8) _(i,16,8,s16) _(i,32,4,s32) _(i,64,2,s64) |
| #define foreach_neon_vec128u \ |
| _(u,8,16,u8) _(u,16,8,u16) _(u,32,4,u32) _(u,64,2,u64) |
| #define foreach_neon_vec128f \ |
| _(f,32,4,f32) _(f,64,2,f64) |
| |
| #define _(t, s, c, i) \ |
| static_always_inline t##s##x##c t##s##x##c##_splat (t##s x) \ |
| { \ |
| return (t##s##x##c) vdupq_n_##i (x); \ |
| } \ |
| \ |
| static_always_inline t##s##x##c t##s##x##c##_load_unaligned (void *p) \ |
| { \ |
| return (t##s##x##c) vld1q_##i (p); \ |
| } \ |
| \ |
| static_always_inline void t##s##x##c##_store_unaligned (t##s##x##c v, \ |
| void *p) \ |
| { \ |
| vst1q_##i (p, v); \ |
| } \ |
| \ |
| static_always_inline int t##s##x##c##_is_all_zero (t##s##x##c x) \ |
| { \ |
| return !!(vminvq_u##s (vceqq_##i (vdupq_n_##i (0), x))); \ |
| } \ |
| \ |
| static_always_inline int t##s##x##c##_is_equal (t##s##x##c a, t##s##x##c b) \ |
| { \ |
| return !!(vminvq_u##s (vceqq_##i (a, b))); \ |
| } \ |
| static_always_inline int t##s##x##c##_is_all_equal (t##s##x##c v, t##s x) \ |
| { \ |
| return t##s##x##c##_is_equal (v, t##s##x##c##_splat (x)); \ |
| }; \ |
| \ |
| static_always_inline u32 t##s##x##c##_zero_byte_mask (t##s##x##c x) \ |
| { \ |
| uint8x16_t v = vreinterpretq_u8_u##s (vceqq_##i (vdupq_n_##i (0), x)); \ |
| return u8x16_compare_byte_mask (v); \ |
| } \ |
| \ |
| static_always_inline t##s##x##c t##s##x##c##_add_saturate (t##s##x##c a, \ |
| t##s##x##c b) \ |
| { \ |
| return (t##s##x##c) vqaddq_##i (a, b); \ |
| } \ |
| \ |
| static_always_inline t##s##x##c t##s##x##c##_sub_saturate (t##s##x##c a, \ |
| t##s##x##c b) \ |
| { \ |
| return (t##s##x##c) vqsubq_##i (a, b); \ |
| } \ |
| \ |
| static_always_inline t##s##x##c t##s##x##c##_blend ( \ |
| t##s##x##c dst, t##s##x##c src, u##s##x##c mask) \ |
| { \ |
| return (t##s##x##c) vbslq_##i (mask, src, dst); \ |
| } |
| |
| foreach_neon_vec128i foreach_neon_vec128u |
| |
| #undef _ |
| /* *INDENT-ON* */ |
| |
| static_always_inline u16x8 |
| u16x8_byte_swap (u16x8 v) |
| { |
| return (u16x8) vrev16q_u8 ((u8x16) v); |
| } |
| |
| static_always_inline u32x4 |
| u32x4_byte_swap (u32x4 v) |
| { |
| return (u32x4) vrev32q_u8 ((u8x16) v); |
| } |
| |
| static_always_inline u32x4 |
| u32x4_hadd (u32x4 v1, u32x4 v2) |
| { |
| return (u32x4) vpaddq_u32 (v1, v2); |
| } |
| |
| static_always_inline u64x2 |
| u64x2_from_u32x4 (u32x4 v) |
| { |
| return vmovl_u32 (vget_low_u32 (v)); |
| } |
| |
| static_always_inline u64x2 |
| u64x2_from_u32x4_high (u32x4 v) |
| { |
| return vmovl_high_u32 (v); |
| } |
| |
| /* Creates a mask made up of the MSB of each byte of the source vector */ |
| static_always_inline u16 |
| u8x16_msb_mask (u8x16 v) |
| { |
| int8x16_t shift = |
| { -7, -6, -5, -4, -3, -2, -1, 0, -7, -6, -5, -4, -3, -2, -1, 0 }; |
| /* v --> [0x80, 0x7F, 0xF0, 0xAF, 0xF0, 0x00, 0xF2, 0x00, ... ] */ |
| uint8x16_t x = vshlq_u8 (vandq_u8 (v, vdupq_n_u8 (0x80)), shift); |
| /* after (v & 0x80) >> shift, |
| * x --> [0x01, 0x00, 0x04, 0x08, 0x10, 0x00, 0x40, 0x00, ... ] */ |
| uint64x2_t x64 = vpaddlq_u32 (vpaddlq_u16 (vpaddlq_u8 (x))); |
| /* after merge, x64 --> [0x5D, 0x.. ] */ |
| return (u16) (vgetq_lane_u64 (x64, 0) + (vgetq_lane_u64 (x64, 1) << 8)); |
| } |
| |
| static_always_inline u64x2 |
| u64x2_gather (void *p0, void *p1) |
| { |
| u64x2 r = vdupq_n_u64 (*(u64 *) p0); |
| r = vsetq_lane_u64 (*(u64 *) p1, r, 1); |
| return r; |
| } |
| |
| static_always_inline u32x4 |
| u32x4_gather (void *p0, void *p1, void *p2, void *p3) |
| { |
| u32x4 r = vdupq_n_u32 (*(u32 *) p0); |
| r = vsetq_lane_u32 (*(u32 *) p1, r, 1); |
| r = vsetq_lane_u32 (*(u32 *) p2, r, 2); |
| r = vsetq_lane_u32 (*(u32 *) p3, r, 3); |
| return r; |
| } |
| |
| static_always_inline void |
| u64x2_scatter (u64x2 r, void *p0, void *p1) |
| { |
| *(u64 *) p0 = vgetq_lane_u64 (r, 0); |
| *(u64 *) p1 = vgetq_lane_u64 (r, 1); |
| } |
| |
| static_always_inline void |
| u32x4_scatter (u32x4 r, void *p0, void *p1, void *p2, void *p3) |
| { |
| *(u32 *) p0 = vgetq_lane_u32 (r, 0); |
| *(u32 *) p1 = vgetq_lane_u32 (r, 1); |
| *(u32 *) p2 = vgetq_lane_u32 (r, 2); |
| *(u32 *) p3 = vgetq_lane_u32 (r, 3); |
| } |
| |
| static_always_inline u32 |
| u32x4_min_scalar (u32x4 v) |
| { |
| return vminvq_u32 (v); |
| } |
| |
| #define u8x16_word_shift_left(x,n) vextq_u8(u8x16_splat (0), x, 16 - n) |
| #define u8x16_word_shift_right(x,n) vextq_u8(x, u8x16_splat (0), n) |
| |
| always_inline u32x4 |
| u32x4_interleave_hi (u32x4 a, u32x4 b) |
| { |
| return (u32x4) vzip2q_u32 (a, b); |
| } |
| |
| always_inline u32x4 |
| u32x4_interleave_lo (u32x4 a, u32x4 b) |
| { |
| return (u32x4) vzip1q_u32 (a, b); |
| } |
| |
| static_always_inline u8x16 |
| u8x16_reflect (u8x16 v) |
| { |
| u8x16 mask = { |
| 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 |
| }; |
| return (u8x16) vqtbl1q_u8 (v, mask); |
| } |
| |
| static_always_inline u8x16 |
| u8x16_xor3 (u8x16 a, u8x16 b, u8x16 c) |
| { |
| #if __GNUC__ == 8 && __ARM_FEATURE_SHA3 == 1 |
| u8x16 r; |
| __asm__ ("eor3 %0.16b,%1.16b,%2.16b,%3.16b": "=w" (r): "0" (a), "w" (b), "w" (c):); |
| return r; |
| #endif |
| return a ^ b ^ c; |
| } |
| |
| static_always_inline u8x16 |
| u8x16_load_partial (u8 *data, uword n) |
| { |
| u8x16 r = {}; |
| if (n > 7) |
| { |
| u64x2 r; |
| r[1] = *(u64u *) (data + n - 8); |
| r >>= (16 - n) * 8; |
| r[0] = *(u64u *) data; |
| return (u8x16) r; |
| } |
| else if (n > 3) |
| { |
| u32x4 r = {}; |
| r[1] = *(u32u *) (data + n - 4); |
| r >>= (8 - n) * 8; |
| r[0] = *(u32u *) data; |
| return (u8x16) r; |
| } |
| else if (n > 1) |
| { |
| u16x8 r = {}; |
| r[1] = *(u16u *) (data + n - 2); |
| r >>= (4 - n) * 8; |
| r[0] = *(u16u *) data; |
| return (u8x16) r; |
| } |
| else if (n > 0) |
| r[0] = *data; |
| return r; |
| } |
| |
| static_always_inline void |
| u8x16_store_partial (u8x16 r, u8 *data, uword n) |
| { |
| if (n > 7) |
| { |
| *(u64u *) (data + n - 8) = ((u64x2) r)[1] << ((16 - n) * 8); |
| *(u64u *) data = ((u64x2) r)[0]; |
| } |
| else if (n > 3) |
| { |
| *(u32u *) (data + n - 4) = ((u32x4) r)[1] << ((8 - n) * 8); |
| *(u32u *) data = ((u32x4) r)[0]; |
| } |
| else if (n > 1) |
| { |
| *(u16u *) (data + n - 2) = ((u16x8) r)[1] << ((4 - n) * 8); |
| *(u16u *) data = ((u16x8) r)[0]; |
| } |
| else if (n > 0) |
| data[0] = r[0]; |
| } |
| |
| #define CLIB_HAVE_VEC128_MSB_MASK |
| |
| #define CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE |
| #define CLIB_VEC128_SPLAT_DEFINED |
| #endif /* included_vector_neon_h */ |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |