MMX� Technology General Support Intrinsics

朴灿烈づ我的快乐病毒、 2022-06-12 11:51 175阅读 0赞

转自 [http://www.gursey.gov.tr/Gilgamesh-WWW/IntelCompDocs/c\_ug/linux337.htm][http_www.gursey.gov.tr_Gilgamesh-WWW_IntelCompDocs_c_ug_linux337.htm]

The prototypes for MMX technology intrinsics are in the mmintrin.h header file.

<table style=""> 
 <tbody> 
 <tr> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Intrinsic Name</th> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Alternate Name</th> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Corresponding Instruction</th> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Operation</th> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Signed</th> 
 <th style="background-color:rgb(194,180,194); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Saturation</th> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_empty</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_empty</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> EMMS</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Empty&nbsp;MM&nbsp;state</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_from_int</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_cvtsi32_si64</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> MOVD</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Convert from&nbsp;int</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_to_int</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_cvtsi64_si32</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> MOVD</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Convert from&nbsp;int</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_packsswb</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_packs_pi16</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PACKSSWB</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Pack</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Yes</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Yes</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_packssdw</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_packs_pi32</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PACKSSDW</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Pack</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Yes</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Yes</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_packuswb</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_packs_pu16</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PACKUSWB</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Pack</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> No</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Yes</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpckhbw</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpackhi_pi8</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKHBW</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpckhwd</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpackhi_pi16</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKHWD</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpckhdq</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpackhi_pi32</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKHDQ</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpcklbw</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpacklo_pi8</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKLBW</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpcklwd</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpacklo_pi16</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKLWD</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 <tr> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _m_punpckldq</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> _mm_unpacklo_pi32</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> PUNPCKLDQ</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> Interleave</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 <td style="background-color:rgb(221,221,221); font-family:sans-serif,arial; font-size:12pt; text-align:left"> --</td> 
 </tr> 
 </tbody> 
</table>

void  \_m\_empty(void)

Empty the multimedia state.  
See [The EMMS Instruction: Why You Need It][The EMMS Instruction_ Why You Need It] figure for details.

\_\_m64 \_m\_from\_int(int i)

Convert the integer object i to a 64-bit \_\_m64 object. The integer value is zero-extended to 64 bits.

int   \_m\_to\_int(\_\_m64 m)

Convert the lower 32 bits of the \_\_m64 object m to an integer.

\_\_m64 \_m\_packsswb(\_\_m64 m1, \_\_m64 m2)

Pack the four 16-bit values from m1 into the lower four 8-bit values of the result with signed saturation, and pack the four 16-bit values from m2 into the upper four 8-bit values of the result with signed saturation.

\_\_m64 \_m\_packssdw(\_\_m64 m1, \_\_m64 m2)

Pack the two 32-bit values from m1 into the lower two 16-bit values of the result with signed saturation, and pack the two 32-bit values from m2 into the upper two 16-bit values of the result with signed saturation.

\_\_m64 \_m\_packuswb(\_\_m64 m1, \_\_m64 m2)

Pack the four 16-bit values from m1 into the lower four 8-bit values of the result with unsigned saturation, and pack the four 16-bit values from m2 into the upper four 8-bit values of the result with unsigned saturation.

\_\_m64 \_m\_punpckhbw(\_\_m64 m1, \_\_m64 m2)

Interleave the four 8-bit values from the high half of m1 with the four values from the high half of m2. The interleaving begins with the data from m1.

\_\_m64 \_m\_punpckhwd(\_\_m64 m1, \_\_m64 m2)

Interleave the two 16-bit values from the high half of m1 with the two values from the high half of m2. The interleaving begins with the data from m1.

\_\_m64 \_m\_punpckhdq(\_\_m64 m1, \_\_m64 m2)

Interleave the 32-bit value from the high half of m1 with the 32-bit value from the high half of m2. The interleaving begins with the data from m1.

\_\_m64 \_m\_punpcklbw(\_\_m64 m1, \_\_m64 m2)

Interleave the four 8-bit values from the low half of m1 with the four values from the low half of m2. The interleaving begins with the data from m1.

\_\_m64 \_m\_punpcklwd(\_\_m64 m1, \_\_m64 m2)

Interleave the two 16-bit values from the low half of m1 with the two values from the low half of m2. The interleaving begins with the data from m1.

\_\_m64 \_m\_punpckldq(\_\_m64 m1, \_\_m64 m2)

Interleave the 32-bit value from the low half of m1 with the 32-bit value from the low half of m2. The interleaving begins with the data from m1.

[http_www.gursey.gov.tr_Gilgamesh-WWW_IntelCompDocs_c_ug_linux337.htm]: http://www.gursey.gov.tr/Gilgamesh-WWW/IntelCompDocs/c_ug/linux337.htm
[The EMMS Instruction_ Why You Need It]: http://www.gursey.gov.tr/Compiler/Archive/Merged%20CHMs/intrinsics/mmx_emms.htm