From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vppinfra/vector_neon.h | 71 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 src/vppinfra/vector_neon.h (limited to 'src/vppinfra/vector_neon.h') diff --git a/src/vppinfra/vector_neon.h b/src/vppinfra/vector_neon.h new file mode 100644 index 00000000000..cea5275949f --- /dev/null +++ b/src/vppinfra/vector_neon.h @@ -0,0 +1,71 @@ +/* + * 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 + +/* Splats. */ + +#define u8x16_splat(i) vdupq_n_u8(i) +#define u16x8_splat(i) vdupq_n_u16(i) +#define i16x8_splat(i) vdupq_n_s16(i) +#define u32x4_splat(i) vdupq_n_u32(i) +#define i32x4_splat(i) vdupq_n_s32(i) + +/* Arithmetic */ +#define u16x8_add(a,b) vaddq_u16(a,b) +#define i16x8_add(a,b) vaddq_s16(a,b) +#define u16x8_sub_saturate(a,b) vsubq_u16(a,b) +#define i16x8_sub_saturate(a,b) vsubq_s16(a,b) + +#define u16x8_is_equal(a,b) vceqq_u16(a,b) +#define i16x8_is_equal(a,b) vceqq_i16(a,b) + +always_inline u32 +u16x8_zero_byte_mask (u16x8 input) +{ + u8x16 vall_one = vdupq_n_u8 (0x0); + u8x16 res_values = { 0x01, 0x02, 0x04, 0x08, + 0x10, 0x20, 0x40, 0x80, + 0x01, 0x02, 0x04, 0x08, + 0x10, 0x20, 0x40, 0x80 + }; + + /* input --> [0x80, 0x40, 0x01, 0xf0, ... ] */ + u8x16 test_result = + vreinterpretq_u8_u16 (vceqq_u16 (input, vreinterpretq_u16_u8 (vall_one))); + u8x16 before_merge = vminq_u8 (test_result, res_values); + /*before_merge--> [0x80, 0x00, 0x00, 0x10, ... ] */ + /* u8x16 --> [a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p] */ + /* pair add until we have 2 uint64_t */ + u16x8 merge1 = vpaddlq_u8 (before_merge); + /* u16x8--> [a+b,c+d, e+f,g+h, i+j,k+l, m+n,o+p] */ + u32x4 merge2 = vpaddlq_u16 (merge1); + /* u32x4--> [a+b+c+d, e+f+g+h, i+j+k+l, m+n+o+p] */ + u64x2 merge3 = vpaddlq_u32 (merge2); + /* u64x2--> [a+b+c+d+e+f+g+h, i+j+k+l+m+n+o+p] */ + return (u32) (vgetq_lane_u64 (merge3, 1) << 8) + vgetq_lane_u64 (merge3, 0); +} + +#endif /* included_vector_neon_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg