VCVTTPD2UDQ - Convert With Truncation Packed Double Precision Floating-Point Values to Packed Unsigned Doubleword Integers

Opcode Instruction

Op / En

64/32 bit Mode Support

CPUID Feature Flag

Description

EVEX.128.0F.W1 78 /r VCVTTPD2UDQ xmm1 {k1}{z}, xmm2/m128/m64bcst

A

V/V

AVX512VL AVX512F

Convert two packed double precision floating-point values in xmm2/m128/m64bcst to two unsigned doubleword integers in xmm1 using truncation subject to writemask k1.

EVEX.256.0F.W1 78 02 /r VCVTTPD2UDQ xmm1 {k1}{z}, ymm2/m256/m64bcst

A

V/V

AVX512VL AVX512F

Convert four packed double precision floating-point values in ymm2/m256/m64bcst to four unsigned doubleword integers in xmm1 using truncation subject to writemask k1.

EVEX.512.0F.W1 78 /r VCVTTPD2UDQ ymm1 {k1}{z}, zmm2/m512/m64bcst{sae}

A

V/V

AVX512F

Convert eight packed double precision floating-point values in zmm2/m512/m64bcst to eight unsigned doubleword integers in ymm1 using truncation subject to 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 with truncation packed double precision floating-point values in the source operand (the second operand) to packed unsigned doubleword integers in the destination operand (the first operand).

When a conversion is inexact, a truncated (round toward zero) value is returned. 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 2w - 1 is returned, where w represents the number of bits in the destination format.

The source operand is a ZMM/YMM/XMM register, a 512/256/128-bit memory location, or a 512/256/128-bit vector broadcasted from a 64-bit memory location. The destination operand is a YMM/XMM/XMM (low 64 bits) register conditionally updated with writemask k1. The upper bits (MAXVL-1:256) of the corresponding destination are zeroed.

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

Operation

VCVTTPD2UDQ (EVEX Encoded Versions) When SRC2 Operand is a Register 

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j := 0 TO KL-1
   i := j * 32
   k := j * 64
   IF k1[j] OR *no writemask*
       THEN 
            DEST[i+31:i] :=
            Convert_Double_Precision_Floating_Point_To_UInteger_Truncate(SRC[k+63:k])
       ELSE 
            IF *merging-masking*                ; merging-masking
                THEN *DEST[i+31:i] remains unchanged*
                ELSE                            ; zeroing-masking
                     DEST[i+31:i] := 0
            FI
   FI;
ENDFOR
DEST[MAXVL-1:VL/2] := 0

VCVTTPD2UDQ (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 * 32
   k := j * 64
   IF k1[j] OR *no writemask*
       THEN 
            IF (EVEX.b = 1) 
                THEN
                     DEST[i+31:i] :=
            Convert_Double_Precision_Floating_Point_To_UInteger_Truncate(SRC[63:0])
                ELSE 
                     DEST[i+31:i] :=
            Convert_Double_Precision_Floating_Point_To_UInteger_Truncate(SRC[k+63:k])
            FI;
       ELSE 
            IF *merging-masking*                ; merging-masking
                THEN *DEST[i+31:i] remains unchanged*
                ELSE                            ; zeroing-masking
                     DEST[i+31:i] := 0
            FI
   FI;
ENDFOR
DEST[MAXVL-1:VL/2] := 0

Intel C/C++ Compiler Intrinsic Equivalent 

VCVTTPD2UDQ __m256i _mm512_cvttpd_epu32( __m512d a);
VCVTTPD2UDQ __m256i _mm512_mask_cvttpd_epu32( __m256i s, __mmask8 k, __m512d a);
VCVTTPD2UDQ __m256i _mm512_maskz_cvttpd_epu32( __mmask8 k, __m512d a);
VCVTTPD2UDQ __m256i _mm512_cvtt_roundpd_epu32( __m512d a, int sae);
VCVTTPD2UDQ __m256i _mm512_mask_cvtt_roundpd_epu32( __m256i s, __mmask8 k, __m512d a, int sae);
VCVTTPD2UDQ __m256i _mm512_maskz_cvtt_roundpd_epu32( __mmask8 k, __m512d a, int sae);
VCVTTPD2UDQ __m128i _mm256_mask_cvttpd_epu32( __m128i s, __mmask8 k, __m256d a);
VCVTTPD2UDQ __m128i _mm256_maskz_cvttpd_epu32( __mmask8 k, __m256d a);
VCVTTPD2UDQ __m128i _mm_mask_cvttpd_epu32( __m128i s, __mmask8 k, __m128d a);
VCVTTPD2UDQ __m128i _mm_maskz_cvttpd_epu32( __mmask8 k, __m128d a);

SIMD Floating-Point Exceptions

Invalid, Precision.

Other Exceptions

EVEX-encoded instructions, see Table 2-46, "Type E2 Class Exception Conditions."

Additionally:

#UD

If EVEX.vvvv != 1111B.