x86 Instruction Set Reference

CVTTPD2DQ

Convert with Truncation Packed Double-Precision Floating-Point Values to Packed Doubleword Integers

Opcode Mnemonic Description
66 0F E6 CVTTPD2DQ xmm1, xmm2/m128 Convert two packed double-precision floating-point values from xmm2/m128 to two packed signed doubleword integers in xmm1 using truncation.
Description

Converts two packed double-precision floating-point values in the source operand (second operand) to two packed signed doubleword integers in the destination operand (first operand). The source operand can be an XMM register or a 128-bit memory location. The destination operand is an XMM register. The result is stored in the low quadword of the destination operand and the high quadword is cleared to all 0s.

When a conversion is inexact, a truncated (round toward zero) result is returned. If a converted result is larger than the maximum signed doubleword integer, the floating-point invalid exception is raised, and if this exception is masked, the indefinite integer value (80000000H) is returned.
Operation 
Destination[0..31] = ConvertDoubleToIntegerTruncate(Source[0..63]);
Destination[32..63] = ConvertDoubleToIntegerTruncate(Source[64..127]);
Destination[64..127] = 0;
SIMD Floating-Point Exceptions
Invalid, Precision.
Protected Mode Exceptions
#GP(0)For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#GP(0)For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#SS(0)For an illegal address in the SS segment.
#PF(fault-code)For a page fault.
#NMIf TS in CR0 is set.
#XMIf an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.
Real-Address Mode Exceptions
#GP(0)If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#GP(0)If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#NMIf TS in CR0 is set.
#XMIf an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.
Virtual-8086 Mode Exceptions
Same exceptions as in Real Address Mode
#PF(fault-code)For a page fault.
Instruction Latency Throughput Execution Unit
CPUID0F3n/0F2n0F3n/0F2n0F2n
CVTTPD2DQ xmm, xmm10/92/2FP_ADD MMX_SHFT