VCVTPD2UQQ—Convert Packed Double-Precision Floating-Point Values to Packed Unsigned Quadword Integers

INSTRUCTION SET REFERENCE, V-Z

Vol. 2C 5-27

VCVTPD2UQQ—Convert Packed Double-Precision Floating-Point Values to Packed Unsigned 

Quadword Integers

Instruction Operand Encoding

Description

Converts packed double-precision floating-point values in the source operand (second operand) to packed 
unsigned quadword integers in the destination operand (first operand). 
When a conversion is inexact, the value returned is rounded according to the rounding control bits in the MXCSR 
register or the embedded rounding control bits. If a converted result cannot be represented in the destination 
format, the floating-point invalid exception is raised, and if this exception is masked, the integer value 2

w

 – 1 is 

returned, where w represents the number of bits in the destination format.
The source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operation 
is a ZMM/YMM/XMM register conditionally updated with writemask k1. 
EVEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.

Operation

VCVTPD2UQQ (EVEX encoded versions) when src operand is a register
(KL, VL) = (2, 128), (4, 256), (8, 512)
IF (VL == 512) AND (EVEX.b == 1) 

THEN

SET_RM(EVEX.RC);

ELSE 

SET_RM(MXCSR.RM);

FI;

FOR j  0 TO KL-1

i  j * 64
IF k1[j] OR *no writemask*

THEN DEST[i+63:i] 

Convert_Double_Precision_Floating_Point_To_UQuadInteger(SRC[i+63:i])

ELSE 

IF *merging-masking*

; merging-masking

THEN *DEST[i+63:i] remains unchanged*
ELSE ; 

zeroing-masking

Opcode/

Instruction

Op / 

En

64/32 

bit Mode 

Support

CPUID 

Feature 

Flag

Description

EVEX.128.66.0F.W1 79 /r

FV

V/V

AVX512VL

Convert two packed double-precision floating-point values from 

xmm2/mem to two packed unsigned quadword integers in 

xmm1 with writemask k1.

VCVTPD2UQQ xmm1 {k1}{z}, 

xmm2/m128/m64bcst 

AVX512DQ

EVEX.256.66.0F.W1 79 /r

FV

V/V

AVX512VL

Convert fourth packed double-precision floating-point values 

from ymm2/mem to four packed unsigned quadword integers 

in ymm1 with writemask k1.

VCVTPD2UQQ ymm1 {k1}{z}, 

ymm2/m256/m64bcst 

AVX512DQ

EVEX.512.66.0F.W1 79 /r

FV

V/V

AVX512DQ

Convert eight packed double-precision floating-point values 

from zmm2/mem to eight packed unsigned quadword integers 

in zmm1 with writemask k1.

VCVTPD2UQQ zmm1 {k1}{z}, 

zmm2/m512/m64bcst{er} 

Op/En

Operand 1

Operand 2

Operand 3

Operand 4

FV

ModRM:reg (w)

ModRM:r/m (r)

NA

NA