xmmintrin.h文件解析
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xmmintrin.h为SSE 头文件，此头文件里包含MMX头文件，其中__m128的定义为：
typedef union __declspec(intrin_type) _CRT_ALIGN(16) __m128 { float m128_f32[4]; unsigned __int64 m128_u64[2]; __int8 m128_i8[16]; __int16 m128_i16[8]; __int32 m128_i32[4]; __int64 m128_i64[2]; unsigned __int8 m128_u8[16]; unsigned __int16 m128_u16[8]; unsigned __int32 m128_u32[4]; } __m128;形式如下：
接下来相关函数：
/* * FP, arithmetic */extern __m128 _mm_add_ss(__m128 _A, __m128 _B);extern __m128 _mm_add_ps(__m128 _A, __m128 _B);extern __m128 _mm_sub_ss(__m128 _A, __m128 _B);extern __m128 _mm_sub_ps(__m128 _A, __m128 _B);extern __m128 _mm_mul_ss(__m128 _A, __m128 _B);extern __m128 _mm_mul_ps(__m128 _A, __m128 _B);extern __m128 _mm_div_ss(__m128 _A, __m128 _B);extern __m128 _mm_div_ps(__m128 _A, __m128 _B);extern __m128 _mm_sqrt_ss(__m128 _A);extern __m128 _mm_sqrt_ps(__m128 _A);extern __m128 _mm_rcp_ss(__m128 _A);extern __m128 _mm_rcp_ps(__m128 _A);extern __m128 _mm_rsqrt_ss(__m128 _A);extern __m128 _mm_rsqrt_ps(__m128 _A);extern __m128 _mm_min_ss(__m128 _A, __m128 _B);extern __m128 _mm_min_ps(__m128 _A, __m128 _B);extern __m128 _mm_max_ss(__m128 _A, __m128 _B);extern __m128 _mm_max_ps(__m128 _A, __m128 _B);/* * FP, logical */extern __m128 _mm_and_ps(__m128 _A, __m128 _B);extern __m128 _mm_andnot_ps(__m128 _A, __m128 _B);extern __m128 _mm_or_ps(__m128 _A, __m128 _B);extern __m128 _mm_xor_ps(__m128 _A, __m128 _B);/* * FP, comparison */extern __m128 _mm_cmpeq_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpeq_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmplt_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmplt_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmple_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmple_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpgt_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpgt_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpge_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpge_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpneq_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpneq_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpnlt_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpnlt_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpnle_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpnle_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpngt_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpngt_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpnge_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpnge_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpord_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpord_ps(__m128 _A, __m128 _B);extern __m128 _mm_cmpunord_ss(__m128 _A, __m128 _B);extern __m128 _mm_cmpunord_ps(__m128 _A, __m128 _B);extern int _mm_comieq_ss(__m128 _A, __m128 _B);extern int _mm_comilt_ss(__m128 _A, __m128 _B);extern int _mm_comile_ss(__m128 _A, __m128 _B);extern int _mm_comigt_ss(__m128 _A, __m128 _B);extern int _mm_comige_ss(__m128 _A, __m128 _B);extern int _mm_comineq_ss(__m128 _A, __m128 _B);extern int _mm_ucomieq_ss(__m128 _A, __m128 _B);extern int _mm_ucomilt_ss(__m128 _A, __m128 _B);extern int _mm_ucomile_ss(__m128 _A, __m128 _B);extern int _mm_ucomigt_ss(__m128 _A, __m128 _B);extern int _mm_ucomige_ss(__m128 _A, __m128 _B);extern int _mm_ucomineq_ss(__m128 _A, __m128 _B);/* * FP, conversions */extern int _mm_cvt_ss2si(__m128 _A);extern __m64 _mm_cvt_ps2pi(__m128 _A);extern int _mm_cvtt_ss2si(__m128 _A);extern __m64 _mm_cvtt_ps2pi(__m128 _A);extern __m128 _mm_cvt_si2ss(__m128, int);extern __m128 _mm_cvt_pi2ps(__m128, __m64);extern float _mm_cvtss_f32(__m128 _A);/* * Support for 64-bit extension intrinsics */#if defined(_M_X64)extern __int64 _mm_cvtss_si64(__m128 _A);extern __int64 _mm_cvttss_si64(__m128 _A);extern __m128 _mm_cvtsi64_ss(__m128 _A, __int64 _B);#endif/* * FP, misc */extern __m128 _mm_shuffle_ps(__m128 _A, __m128 _B, unsigned int _Imm8);extern __m128 _mm_unpackhi_ps(__m128 _A, __m128 _B);extern __m128 _mm_unpacklo_ps(__m128 _A, __m128 _B);extern __m128 _mm_loadh_pi(__m128, __m64 const*);extern __m128 _mm_movehl_ps(__m128, __m128);extern __m128 _mm_movelh_ps(__m128, __m128);extern void _mm_storeh_pi(__m64 *, __m128);extern __m128 _mm_loadl_pi(__m128, __m64 const*);extern void _mm_storel_pi(__m64 *, __m128);extern int _mm_movemask_ps(__m128 _A);/* * Integer extensions */extern int _m_pextrw(__m64, int);extern __m64 _m_pinsrw(__m64, int, int);extern __m64 _m_pmaxsw(__m64, __m64);extern __m64 _m_pmaxub(__m64, __m64);extern __m64 _m_pminsw(__m64, __m64);extern __m64 _m_pminub(__m64, __m64);extern int _m_pmovmskb(__m64);extern __m64 _m_pmulhuw(__m64, __m64);extern __m64 _m_pshufw(__m64, int);extern void _m_maskmovq(__m64, __m64, char *);extern __m64 _m_pavgb(__m64, __m64);extern __m64 _m_pavgw(__m64, __m64);extern __m64 _m_psadbw(__m64, __m64);/* * memory & initialization */extern __m128 _mm_set_ss(float _A);extern __m128 _mm_set_ps1(float _A);extern __m128 _mm_set_ps(float _A, float _B, float _C, float _D);extern __m128 _mm_setr_ps(float _A, float _B, float _C, float _D);extern __m128 _mm_setzero_ps(void);extern __m128 _mm_load_ss(float const*_A);extern __m128 _mm_load_ps1(float const*_A);extern __m128 _mm_load_ps(float const*_A);extern __m128 _mm_loadr_ps(float const*_A);extern __m128 _mm_loadu_ps(float const*_A);extern void _mm_store_ss(float *_V, __m128 _A);extern void _mm_store_ps1(float *_V, __m128 _A);extern void _mm_store_ps(float *_V, __m128 _A);extern void _mm_storer_ps(float *_V, __m128 _A);extern void _mm_storeu_ps(float *_V, __m128 _A);extern void _mm_prefetch(char const*_A, int _Sel);extern void _mm_stream_pi(__m64 *, __m64);extern void _mm_stream_ps(float *, __m128);extern __m128 _mm_move_ss(__m128 _A, __m128 _B);extern void _mm_sfence(void);extern unsigned int _mm_getcsr(void);extern void _mm_setcsr(unsigned int);#ifdef __ICLextern void* __cdecl _mm_malloc(size_t _Siz, size_t _Al);extern void __cdecl _mm_free(void *_P);#endif/* Alternate intrinsic names definition */#define _mm_cvtss_si32 _mm_cvt_ss2si#define _mm_cvtps_pi32 _mm_cvt_ps2pi#define _mm_cvttss_si32 _mm_cvtt_ss2si#define _mm_cvttps_pi32 _mm_cvtt_ps2pi#define _mm_cvtsi32_ss _mm_cvt_si2ss#define _mm_cvtpi32_ps _mm_cvt_pi2ps#define _mm_extract_pi16 _m_pextrw#define _mm_insert_pi16 _m_pinsrw#define _mm_max_pi16 _m_pmaxsw#define _mm_max_pu8 _m_pmaxub#define _mm_min_pi16 _m_pminsw#define _mm_min_pu8 _m_pminub#define _mm_movemask_pi8 _m_pmovmskb#define _mm_mulhi_pu16 _m_pmulhuw#define _mm_shuffle_pi16 _m_pshufw#define _mm_maskmove_si64 _m_maskmovq#define _mm_avg_pu8 _m_pavgb#define _mm_avg_pu16 _m_pavgw#define _mm_sad_pu8 _m_psadbw#define _mm_set1_ps _mm_set_ps1#define _mm_load1_ps _mm_load_ps1#define _mm_store1_ps _mm_store_ps1
/***********************************************************/ /* NAME : _mm_cvtpu16_ps */ /* DESCRIPTION : Convert 4 16-bit unsigned integer values */ /* to 4 single-precision float values */ /* IN : __m64 a */ /* OUT : none */ /* RETURN : __m128 : (float)a */ /***********************************************************/__inline __m128 _mm_cvtpu16_ps(__m64 a){ __m128 tmp; __m64 ext_val = _mm_setzero_si64(); tmp = _mm_cvtpi32_ps(_mm_setzero_ps(), _mm_unpackhi_pi16(a, ext_val)); return(_mm_cvtpi32_ps(_mm_movelh_ps(tmp, tmp), _mm_unpacklo_pi16(a, ext_val)));} /******************************************************/ /* NAME : _mm_cvtps_pi16 */ /* DESCRIPTION : Convert 4 single-precision float */ /* values to 4 16-bit integer values */ /* IN : __m128 a */ /* OUT : none */ /* RETURN : __m64 : (short)a */ /******************************************************/__inline __m64 _mm_cvtps_pi16(__m128 a){ return _mm_packs_pi32(_mm_cvtps_pi32(a), _mm_cvtps_pi32(_mm_movehl_ps(a, a)));} /******************************************************/ /* NAME : _mm_cvtpi8_ps */ /* DESCRIPTION : Convert 4 8-bit integer values to 4 */ /* single-precision float values */ /* IN : __m64 a */ /* OUT : none */ /* RETURN : __m128 : (float)a */ /******************************************************/__inline __m128 _mm_cvtpi8_ps(__m64 a){ __m64 ext_val = _mm_cmpgt_pi8(_mm_setzero_si64(), a); return _mm_cvtpi16_ps(_mm_unpacklo_pi8(a, ext_val));} /******************************************************/ /* NAME : _mm_cvtpu8_ps */ /* DESCRIPTION : Convert 4 8-bit unsigned integer */ /* values to 4 single-precision float */ /* values */ /* IN : __m64 a */ /* OUT : none */ /* RETURN : __m128 : (float)a */ /******************************************************/__inline __m128 _mm_cvtpu8_ps(__m64 a){ return _mm_cvtpu16_ps(_mm_unpacklo_pi8(a, _mm_setzero_si64()));} /******************************************************/ /* NAME : _mm_cvtps_pi8 */ /* DESCRIPTION : Convert 4 single-precision float */ /* values to 4 8-bit integer values */ /* IN : __m128 a */ /* OUT : none */ /* RETURN : __m64 : (char)a */ /******************************************************/__inline __m64 _mm_cvtps_pi8(__m128 a){ return _mm_packs_pi16(_mm_cvtps_pi16(a), _mm_setzero_si64());} /******************************************************/ /* NAME : _mm_cvtpi32x2_ps */ /* DESCRIPTION : Convert 4 32-bit integer values */ /* to 4 single-precision float values */ /* IN : __m64 a : operand 1 */ /* __m64 b : operand 2 */ /* OUT : none */ /* RETURN : __m128 : (float)a,(float)b */ /******************************************************/__inline __m128 _mm_cvtpi32x2_ps(__m64 a, __m64 b){ return _mm_movelh_ps(_mm_cvt_pi2ps(_mm_setzero_ps(), a), _mm_cvt_pi2ps(_mm_setzero_ps(), b)); }这一块贴开始的一段函数:
/*******************************************************/ /* MACRO for shuffle parameter for _mm_shuffle_ps(). */ /* Argument fp3 is a digit[0123] that represents the fp*/ /* from argument "b" of mm_shuffle_ps that will be */ /* placed in fp3 of result. fp2 is the same for fp2 in */ /* result. fp1 is a digit[0123] that represents the fp */ /* from argument "a" of mm_shuffle_ps that will be */ /* places in fp1 of result. fp0 is the same for fp0 of */ /* result */ /*******************************************************/#define _MM_SHUFFLE(fp3,fp2,fp1,fp0) (((fp3) << 6) | ((fp2) << 4) | \ ((fp1) << 2) | ((fp0))) /*******************************************************/ /* MACRO for performing the transpose of a 4x4 matrix */ /* of single precision floating point values. */ /* Arguments row0, row1, row2, and row3 are __m128 */ /* values whose elements form the corresponding rows */ /* of a 4x4 matrix. The matrix transpose is returned */ /* in arguments row0, row1, row2, and row3 where row0 */ /* now holds column 0 of the original matrix, row1 now */ /* holds column 1 of the original matrix, etc. */ /*******************************************************/#define _MM_TRANSPOSE4_PS(row0, row1, row2, row3) { \ __m128 tmp3, tmp2, tmp1, tmp0; \ \ tmp0 = _mm_shuffle_ps((row0), (row1), 0x44); \ tmp2 = _mm_shuffle_ps((row0), (row1), 0xEE); \ tmp1 = _mm_shuffle_ps((row2), (row3), 0x44); \ tmp3 = _mm_shuffle_ps((row2), (row3), 0xEE); \ \ (row0) = _mm_shuffle_ps(tmp0, tmp1, 0x88); \ (row1) = _mm_shuffle_ps(tmp0, tmp1, 0xDD); \ (row2) = _mm_shuffle_ps(tmp2, tmp3, 0x88); \ (row3) = _mm_shuffle_ps(tmp2, tmp3, 0xDD); \ }/* constants for use with _mm_prefetch */#define _MM_HINT_T0 1#define _MM_HINT_T1 2#define _MM_HINT_T2 3#define _MM_HINT_NTA 0/* (this declspec not supported with 0.A or 0.B) */#define _MM_ALIGN16 _CRT_ALIGN(16)/* MACRO functions for setting and reading the MXCSR */#define _MM_EXCEPT_MASK 0x003f#define _MM_EXCEPT_INVALID 0x0001#define _MM_EXCEPT_DENORM 0x0002#define _MM_EXCEPT_DIV_ZERO 0x0004#define _MM_EXCEPT_OVERFLOW 0x0008#define _MM_EXCEPT_UNDERFLOW 0x0010#define _MM_EXCEPT_INEXACT 0x0020#define _MM_MASK_MASK 0x1f80#define _MM_MASK_INVALID 0x0080#define _MM_MASK_DENORM 0x0100#define _MM_MASK_DIV_ZERO 0x0200#define _MM_MASK_OVERFLOW 0x0400#define _MM_MASK_UNDERFLOW 0x0800#define _MM_MASK_INEXACT 0x1000#define _MM_ROUND_MASK 0x6000#define _MM_ROUND_NEAREST 0x0000#define _MM_ROUND_DOWN 0x2000#define _MM_ROUND_UP 0x4000#define _MM_ROUND_TOWARD_ZERO 0x6000#define _MM_FLUSH_ZERO_MASK 0x8000#define _MM_FLUSH_ZERO_ON 0x8000#define _MM_FLUSH_ZERO_OFF 0x0000#define _MM_SET_EXCEPTION_STATE(mask) \ _mm_setcsr((_mm_getcsr() & ~_MM_EXCEPT_MASK) | (mask))#define _MM_GET_EXCEPTION_STATE() \ (_mm_getcsr() & _MM_EXCEPT_MASK)#define _MM_SET_EXCEPTION_MASK(mask) \ _mm_setcsr((_mm_getcsr() & ~_MM_MASK_MASK) | (mask))#define _MM_GET_EXCEPTION_MASK() \ (_mm_getcsr() & _MM_MASK_MASK)#define _MM_SET_ROUNDING_MODE(mode) \ _mm_setcsr((_mm_getcsr() & ~_MM_ROUND_MASK) | (mode))#define _MM_GET_ROUNDING_MODE() \ (_mm_getcsr() & _MM_ROUND_MASK)#define _MM_SET_FLUSH_ZERO_MODE(mode) \ _mm_setcsr((_mm_getcsr() & ~_MM_FLUSH_ZERO_MASK) | (mode))#define _MM_GET_FLUSH_ZERO_MODE() \ (_mm_getcsr() & _MM_FLUSH_ZERO_MASK) 0 0
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