xmmintrin.h文件解析
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;
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 __ICL
extern 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)