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) 2011-2018 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/>. */
#if !defined _X86INTRIN_H_INCLUDED && !defined _IMMINTRIN_H_INCLUDED
# error "Never use <f16intrin.h> directly; include <x86intrin.h> or <immintrin.h> instead."
#endif
#ifndef _F16CINTRIN_H_INCLUDED
#define _F16CINTRIN_H_INCLUDED
#ifndef __F16C__
#pragma GCC push_options
#pragma GCC target("f16c")
#define __DISABLE_F16C__
#endif /* __F16C__ */
extern __inline float __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_cvtsh_ss (unsigned short __S)
{
__v8hi __H = __extension__ (__v8hi){ (short) __S, 0, 0, 0, 0, 0, 0, 0 };
__v4sf __A = __builtin_ia32_vcvtph2ps (__H);
return __builtin_ia32_vec_ext_v4sf (__A, 0);
}
extern __inline __m128 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_cvtph_ps (__m128i __A)
{
return (__m128) __builtin_ia32_vcvtph2ps ((__v8hi) __A);
}
extern __inline __m256 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm256_cvtph_ps (__m128i __A)
{
return (__m256) __builtin_ia32_vcvtph2ps256 ((__v8hi) __A);
}
#ifdef __OPTIMIZE__
extern __inline unsigned short __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_cvtss_sh (float __F, const int __I)
{
__v4sf __A = __extension__ (__v4sf){ __F, 0, 0, 0 };
__v8hi __H = __builtin_ia32_vcvtps2ph (__A, __I);
return (unsigned short) __builtin_ia32_vec_ext_v8hi (__H, 0);
}
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_cvtps_ph (__m128 __A, const int __I)
{
return (__m128i) __builtin_ia32_vcvtps2ph ((__v4sf) __A, __I);
}
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm256_cvtps_ph (__m256 __A, const int __I)
{
return (__m128i) __builtin_ia32_vcvtps2ph256 ((__v8sf) __A, __I);
}
#else
#define _cvtss_sh(__F, __I) \
(__extension__ \
({ \
__v4sf __A = __extension__ (__v4sf){ __F, 0, 0, 0 }; \
__v8hi __H = __builtin_ia32_vcvtps2ph (__A, __I); \
(unsigned short) __builtin_ia32_vec_ext_v8hi (__H, 0); \
}))
#define _mm_cvtps_ph(A, I) \
((__m128i) __builtin_ia32_vcvtps2ph ((__v4sf)(__m128) (A), (int) (I)))
#define _mm256_cvtps_ph(A, I) \
((__m128i) __builtin_ia32_vcvtps2ph256 ((__v8sf)(__m256) (A), (int) (I)))
#endif /* __OPTIMIZE */
#ifdef __DISABLE_F16C__
#undef __DISABLE_F16C__
#pragma GCC pop_options
#endif /* __DISABLE_F16C__ */
#endif /* _F16CINTRIN_H_INCLUDED */