Opcode/Instruction | Op/En | 64/32-bit Mode | CPUID Feature Flag | Description |

66 0F E6 /r CVTTPD2DQ xmm1, xmm2/m128 |
RM | V/V | SSE2 | Convert two packed double-precision floatingpoint values from xmm2/m128 to two packed signed doubleword integers in xmm1 using truncation. |

VEX.128.66.0F.WIG E6 /r VCVTTPD2DQ xmm1, xmm2/m128 | RM | V/V | AVX | Convert two packed double-precision floatingpoint values in xmm2/mem to two signed doubleword integers in xmm1 using truncation. |

VEX.256.66.0F.WIG E6 /r VCVTTPD2DQ xmm1, ymm2/m256 | RM | V/V | AVX | Convert four packed double-precision floatingpoint values in ymm2/mem to four signed doubleword integers in xmm1 using truncation. |

Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |

RM | ModRM:reg (w) | ModRM:r/m (r) | NA | NA |

Converts two or four packed double-precision floating-point values in the source operand (second operand) to two or four packed signed doubleword integers in the destination operand (first operand). When a conversion is inexact, a truncated (round toward zero) value 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.

In 64-bit mode, use of the REX.R prefix permits this instruction to access additional registers (XMM8-XMM15). 128-bit Legacy SSE version: The source operand is an XMM register or 128- bit memory location. The destination operation is an XMM register. The upper bits (VLMAX-1:128) of the corresponding YMM register destination are unmodified. VEX.128 encoded version: The source operand is an XMM register or 128- bit memory location. The destination operation is a YMM register. The upper bits (VLMAX-1:128) of the corresponding YMM register destination are zeroed. VEX.256 encoded version: The source operand is a YMM register or 256- bit memory location. The destination operation is an XMM register. The upper bits (255:128) of the corresponding YMM register destination are zeroed. Note: In VEX-encoded versions, VEX.vvvv is reserved and must be 1111b, otherwise instructions will #UD.

SRC DEST | X3 Figure 3-14. | X2 0 VCVTTPD2DQ (VEX.256 encoded version) | X1 X2 | X0 X0 |

CVTTPD2DQ (128-bit Legacy SSE version) DEST[31:0] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0]) DEST[63:32] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64]) DEST[127:64] ← 0 DEST[VLMAX-1:128] (unmodified) VCVTTPD2DQ (VEX.128 encoded version) DEST[31:0] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0]) DEST[63:32] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64]) DEST[VLMAX-1:64] ← 0 VCVTTPD2DQ (VEX.256 encoded version) DEST[31:0] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0]) DEST[63:32] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64]) DEST[95:64] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[191:128]) DEST[127:96] ← Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[255:192) DEST[255:128]← 0

CVTTPD2DQ: | __m128i _mm_cvttpd_epi32(__m128d a) |

VCVTTPD2DQ: | __m128i _mm256_cvttpd_epi32 (__m256d src) |

Invalid, Precision.

See Exceptions Type 2; additionally

#UD | If VEX.vvvv != 1111B. |