晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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/* Copyright (C) 2008-2018 Free Software Foundation, Inc.

   This file is part of GCC.

   GCC is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   GCC is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.

   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   <http://www.gnu.org/licenses/>.  */

/* Implemented from the specification included in the Intel C++ Compiler
   User Guide and Reference, version 10.1.  */

#ifndef _WMMINTRIN_H_INCLUDED
#define _WMMINTRIN_H_INCLUDED

/* We need definitions from the SSE2 header file.  */
#include <emmintrin.h>

/* AES */

#if !defined(__AES__) || !defined(__SSE2__)
#pragma GCC push_options
#pragma GCC target("aes,sse2")
#define __DISABLE_AES__
#endif /* __AES__ */

/* Performs 1 round of AES decryption of the first m128i using 
   the second m128i as a round key.  */
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aesdec_si128 (__m128i __X, __m128i __Y)
{
  return (__m128i) __builtin_ia32_aesdec128 ((__v2di)__X, (__v2di)__Y);
}

/* Performs the last round of AES decryption of the first m128i 
   using the second m128i as a round key.  */
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aesdeclast_si128 (__m128i __X, __m128i __Y)
{
  return (__m128i) __builtin_ia32_aesdeclast128 ((__v2di)__X,
						 (__v2di)__Y);
}

/* Performs 1 round of AES encryption of the first m128i using 
   the second m128i as a round key.  */
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aesenc_si128 (__m128i __X, __m128i __Y)
{
  return (__m128i) __builtin_ia32_aesenc128 ((__v2di)__X, (__v2di)__Y);
}

/* Performs the last round of AES encryption of the first m128i
   using the second m128i as a round key.  */
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aesenclast_si128 (__m128i __X, __m128i __Y)
{
  return (__m128i) __builtin_ia32_aesenclast128 ((__v2di)__X, (__v2di)__Y);
}

/* Performs the InverseMixColumn operation on the source m128i 
   and stores the result into m128i destination.  */
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aesimc_si128 (__m128i __X)
{
  return (__m128i) __builtin_ia32_aesimc128 ((__v2di)__X);
}

/* Generates a m128i round key for the input m128i AES cipher key and
   byte round constant.  The second parameter must be a compile time
   constant.  */
#ifdef __OPTIMIZE__
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_aeskeygenassist_si128 (__m128i __X, const int __C)
{
  return (__m128i) __builtin_ia32_aeskeygenassist128 ((__v2di)__X, __C);
}
#else
#define _mm_aeskeygenassist_si128(X, C)					\
  ((__m128i) __builtin_ia32_aeskeygenassist128 ((__v2di)(__m128i)(X),	\
						(int)(C)))
#endif

#ifdef __DISABLE_AES__
#undef __DISABLE_AES__
#pragma GCC pop_options
#endif /* __DISABLE_AES__ */

/* PCLMUL */

#if !defined(__PCLMUL__) || !defined(__SSE2__)
#pragma GCC push_options
#pragma GCC target("pclmul,sse2")
#define __DISABLE_PCLMUL__
#endif /* __PCLMUL__ */

/* Performs carry-less integer multiplication of 64-bit halves of
   128-bit input operands.  The third parameter inducates which 64-bit
   haves of the input parameters v1 and v2 should be used. It must be
   a compile time constant.  */
#ifdef __OPTIMIZE__
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_clmulepi64_si128 (__m128i __X, __m128i __Y, const int __I)
{
  return (__m128i) __builtin_ia32_pclmulqdq128 ((__v2di)__X,
						(__v2di)__Y, __I);
}
#else
#define _mm_clmulepi64_si128(X, Y, I)					\
  ((__m128i) __builtin_ia32_pclmulqdq128 ((__v2di)(__m128i)(X),		\
					  (__v2di)(__m128i)(Y), (int)(I)))
#endif

#ifdef __DISABLE_PCLMUL__
#undef __DISABLE_PCLMUL__
#pragma GCC pop_options
#endif /* __DISABLE_PCLMUL__ */

#endif /* _WMMINTRIN_H_INCLUDED */

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