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<strong>AMD</strong> <strong>64</strong>-<strong>Bit</strong> <strong>Technology</strong> 26568—Rev. 3.02—August 2002<br />

CVTPD2DQ<br />

Convert Packed Double-Precision Floating-Point<br />

to Packed Doubleword Integers<br />

Converts two packed double-precision floating-point values in an XMM register or a<br />

128-bit memory location to two packed 32-bit signed integers and writes the converted<br />

values in the low-order <strong>64</strong> bits of another XMM register. The high-order <strong>64</strong> bits in the<br />

destination XMM register are cleared to all 0s.<br />

Mnemonic Opcode Description<br />

CVTPD2DQ xmm1, xmm2/mem128 F2 0F E6 /r Converts packed double-precision floating-point values in<br />

an XMM register or 128-bit memory location to packed<br />

doubleword integers in the destination XMM register.<br />

xmm1<br />

xmm2/mem128<br />

127 <strong>64</strong> 63 32 31<br />

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

0<br />

convert<br />

convert<br />

cvtpd2dq.eps<br />

If the result of the conversion is an inexact value, the value is rounded as specified by<br />

the rounding control bits (RC) in the MXCSR register. If the floating-point value is a<br />

NaN, infinity, or if the result of the conversion is larger than the maximum signed<br />

doubleword (–2 31 to +2 31 – 1), the instruction returns the 32-bit indefinite integer<br />

value (8000_0000h) when the invalid-operation exception (IE) is masked.<br />

Related Instructions<br />

CVTDQ2PD, CVTPD2PI, CVTPI2PD, CVTSD2SI, CVTSI2SD, CVTTPD2DQ,<br />

CVTTPD2PI, CVTTSD2SI<br />

rFLAGS Affected<br />

None<br />

46 CVTPD2DQ

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