VCVTTPD2UQQ — Convert with Truncation Packed Double-Precision Floating-Point Values to Packed Unsigned Quadword Integers

Opcode/Instruction	Op/En	64/32 bit Mode Support	CPUID Feature Flag	Description
EVEX.128.66.0F.W1 78 /r VCVTTPD2UQQ xmm1 {k1}{z}, xmm2/m128/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert two packed double-precision floating-point values from xmm2/m128/m64bcst to two packed unsigned quadword integers in xmm1 using truncation with writemask k1.
EVEX.256.66.0F.W1 78 /r VCVTTPD2UQQ ymm1 {k1}{z}, ymm2/m256/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert four packed double-precision floating-point values from ymm2/m256/m64bcst to four packed unsigned quadword integers in ymm1 using truncation with writemask k1.
EVEX.512.66.0F.W1 78 /r VCVTTPD2UQQ zmm1 {k1}{z}, zmm2/m512/m64bcst{sae}	A	V/V	AVX512DQ	Convert eight packed double-precision floating-point values from zmm2/mem to eight packed unsigned quadword integers in zmm1 using truncation 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)	NA	NA

Description ¶

Converts with truncation 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. 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.

EVEX encoded versions: 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.

Note: EVEX.vvvv is reserved and must be 1111b, otherwise instructions will #UD.

Operation ¶

VCVTTPD2UQQ (EVEX encoded versions) when src operand is a register ¶

(KL, VL) = (2, 128), (4, 256), (8, 512)
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_Truncate(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
    FI;
ENDFOR
DEST[MAXVL-1:VL] ← 0

VCVTTPD2UQQ (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_Truncate(SRC[63:0])
                ELSE
                    DEST[i+63:i] ←
            Convert_Double_Precision_Floating_Point_To_UQuadInteger_Truncate(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 ¶

VCVTTPD2UQQ _mm<size>[_mask[z]]_cvtt[_round]pd_epu64 VCVTTPD2UQQ __m512i _mm512_cvttpd_epu64( __m512d a);

VCVTTPD2UQQ __m512i _mm512_mask_cvttpd_epu64( __m512i s, __mmask8 k, __m512d a);

VCVTTPD2UQQ __m512i _mm512_maskz_cvttpd_epu64( __mmask8 k, __m512d a);

VCVTTPD2UQQ __m512i _mm512_cvtt_roundpd_epu64( __m512d a, int sae);

VCVTTPD2UQQ __m512i _mm512_mask_cvtt_roundpd_epu64( __m512i s, __mmask8 k, __m512d a, int sae);

VCVTTPD2UQQ __m512i _mm512_maskz_cvtt_roundpd_epu64( __mmask8 k, __m512d a, int sae);

VCVTTPD2UQQ __m256i _mm256_mask_cvttpd_epu64( __m256i s, __mmask8 k, __m256d a);

VCVTTPD2UQQ __m256i _mm256_maskz_cvttpd_epu64( __mmask8 k, __m256d a);

VCVTTPD2UQQ __m128i _mm_mask_cvttpd_epu64( __m128i s, __mmask8 k, __m128d a);

VCVTTPD2UQQ __m128i _mm_maskz_cvttpd_epu64( __mmask8 k, __m128d a);

SIMD Floating-Point Exceptions ¶

Invalid, Precision

Other Exceptions ¶

EVEX-encoded instructions, see Exceptions Type E2.

#UD	If EVEX.vvvv != 1111B.