vcvtpd2uqq

Convert Packed Double to Unsigned Quadword

VCVTPD2UQ zmm1 {k1}, zmm2/m512

Converts 64-bit doubles to unsigned 64-bit integers.

Details

Converts packed 64-bit double-precision floating-point values to unsigned 64-bit integers. The instruction reads 512 bits (4 × 64-bit doubles from zmm2/m512) and produces 512 bits (4 × 64-bit unsigned integers in zmm1). EVEX masking via k1 and rounding control are supported; overflow conditions and NaN inputs trigger invalid floating-point exceptions. Operates in 64-bit, protected, and real modes with AVX-512F support.

Pseudocode Operation

zmm1[63:0] ← convert_double_to_uint64(src[63:0]); zmm1[127:64] ← convert_double_to_uint64(src[127:64]); zmm1[191:128] ← convert_double_to_uint64(src[191:128]); zmm1[255:192] ← convert_double_to_uint64(src[255:192]);

Example

VCVTPD2UQ zmm1, zmm2/m512

Encoding

Binary Layout

EVEX

Format EVEX

Opcode EVEX.512.66.0F.W1 79 /r

Extension AVX-512F

Operands

dest
512-bit ZMM AVX-512 register
src
512-bit ZMM AVX-512 register or Memory operand

Reference (Intel® SDM)

Instruction Forms

Opcode	Instruction	Op/En	64/32-bit Mode	CPUID	Description
EVEX.128.66.0F.W1 79 /r	VCVTPD2UQQ xmm1 {k1}{z}, xmm2/m128/m64bcst	A	V/V	(AVX512VL AND AVX512DQ) OR AVX10.1	Convert two packed double precision floating-point values from xmm2/mem to two packed unsigned quadword integers in xmm1 with writemask k1.
EVEX.256.66.0F.W1 79 /r	VCVTPD2UQQ ymm1 {k1}{z}, ymm2/m256/m64bcst	A	V/V	(AVX512VL AND AVX512DQ) OR AVX10.1	Convert fourth packed double precision floating-point values from ymm2/mem to four packed unsigned quadword integers in ymm1 with writemask k1.
EVEX.512.66.0F.W1 79 /r	VCVTPD2UQQ zmm1 {k1}{z}, zmm2/m512/m64bcst {er}	A	V/V	AVX512DQ OR AVX10.1	Convert eight packed double precision floating-point values from zmm2/mem to eight packed unsigned quadword integers in zmm1 with writemask k1.

Instruction Operand Encoding

Op/En	Tuple Type	Operand 1	Operand 2	Operand 3	Operand 4
A	Full	ModRM:reg (w)	ModRM:r/m (r)	N/A	N/A

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 FFFFFFFF_FFFFFFFFH is returned. 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_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);
ELSE
SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);
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
DEST[i+63:i] := 0
FI


VCVTPD2UQQ—Convert Packed Double Precision Floating-Point Values to Packed Unsigned Quadword Integers                              Vol. 2C 5-47
FI;
ENDFOR
DEST[MAXVL-1:VL] := 0

VCVTPD2UQQ (EVEX Encoded Versions) When SRC Operand is a Memory Source
(KL, VL) = (2, 128), (4, 256), (8, 512)

FOR j := 0 TO KL-1
i := j * 64
IF k1[j] OR *no writemask*
THEN
IF (EVEX.b == 1)
THEN
DEST[i+63:i] :=
Convert_Double_Precision_Floating_Point_To_UQuadInteger(SRC[63:0])
ELSE
DEST[i+63:i] :=
Convert_Double_Precision_Floating_Point_To_UQuadInteger(SRC[i+63:i])
FI;
ELSE
IF *merging-masking*                                 ; merging-masking
THEN *DEST[i+63:i] remains unchanged*
ELSE                                                         ; zeroing-masking
DEST[i+63:i] := 0
FI
FI;
ENDFOR
DEST[MAXVL-1:VL] := 0

Intel C/C++ Compiler Intrinsic Equivalent

VCVTPD2UQQ __m512i _mm512_cvtpd_epu64( __m512d a);
VCVTPD2UQQ __m512i _mm512_mask_cvtpd_epu64( __m512i s, __mmask8 k, __m512d a);
VCVTPD2UQQ __m512i _mm512_maskz_cvtpd_epu64( __mmask8 k, __m512d a);
VCVTPD2UQQ __m512i _mm512_cvt_roundpd_epu64( __m512d a, int r);
VCVTPD2UQQ __m512i _mm512_mask_cvt_roundpd_epu64( __m512i s, __mmask8 k, __m512d a, int r);
VCVTPD2UQQ __m512i _mm512_maskz_cvt_roundpd_epu64( __mmask8 k, __m512d a, int r);
VCVTPD2UQQ __m256i _mm256_mask_cvtpd_epu64( __m256i s, __mmask8 k, __m256d a);
VCVTPD2UQQ __m256i _mm256_maskz_cvtpd_epu64( __mmask8 k, __m256d a);
VCVTPD2UQQ __m128i _mm_mask_cvtpd_epu64( __m128i s, __mmask8 k, __m128d a);
VCVTPD2UQQ __m128i _mm_maskz_cvtpd_epu64( __mmask8 k, __m128d a);
VCVTPD2UQQ __m256i _mm256_cvtpd_epu64 (__m256d src)
VCVTPD2UQQ __m128i _mm_cvtpd_epu64 (__m128d src)

Exceptions

SIMD Floating-Point Exceptions

Invalid, Precision. VCVTPD2UQQ—Convert Packed Double Precision Floating-Point Values to Packed Unsigned Quadword Integers Vol. 2C 5-48

Other Exceptions

EVEX-encoded instructions, see Table 2-48, “Type E2 Class Exception Conditions.” Additionally: #UD If EVEX.vvvv != 1111B. VCVTPD2UQQ—Convert Packed Double Precision Floating-Point Values to Packed Unsigned Quadword Integers Vol. 2C 5-49