09.01.2013 Views

AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

<strong>AMD</strong><strong>64</strong> Technology 26568—Rev. 3.05—September 2003<br />

PSRLQ Packed Shift Right Logical Quadwords<br />

Right-shifts each <strong>64</strong>-bit value in the first source operand by the number of bits<br />

specified in the second source operand and writes each shifted value in the<br />

corresponding quadword of the destination (first source). The first source/destination<br />

and second source operands are:<br />

� an XMM register and another XMM register or <strong>128</strong>-bit memory location, or<br />

� an XMM register and an immediate byte value.<br />

The high-order bits that are emptied by the shift operation are cleared to 0. If the shift<br />

value is greater than 63, the destination is cleared to 0.<br />

Mnemonic Opcode Description<br />

PSRLQ xmm1, xmm2/mem<strong>128</strong> 66 0F D3 /r Right-shifts packed quadwords in an XMM register by the<br />

amount specified in the low <strong>64</strong> bits of an XMM register or <strong>128</strong>bit<br />

memory location.<br />

PSRLQ xmm, imm8 66 0F 73 /2 ib Right-shifts packed quadwords in an XMM register by the<br />

amount specified in an immediate byte value.<br />

xmm1 xmm2/mem<strong>128</strong><br />

127 <strong>64</strong> 63 0<br />

shift right<br />

shift right<br />

shift right<br />

xmm imm8<br />

shift right<br />

304 PSRLQ<br />

127 <strong>64</strong><br />

63 0<br />

127 <strong>64</strong> 63 0<br />

7 0<br />

psrlq-<strong>128</strong>.eps

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!