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CVTTPD2DQ—Convert with Truncation Packed Double-Precision Floating-Point Values to Packed Doubleword Integers

Opcode/Instruction Op /En 64/32 bit Mode Support CPUID Feature Flag Description
66 0F E6 /r CVTTPD2DQ xmm1, xmm2/m128 RM V/V SSE2 Convert two packed double-precision floating-point values in xmm2/mem to two 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 floating-point 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 floating-point values in ymm2/mem to four signed doubleword integers in xmm1 using truncation.
EVEX.128.66.0F.W1 E6 /r VCVTTPD2DQ xmm1 {k1}{z}, xmm2/m128/m64bcst FV V/V AVX512VL AVX512F Convert two packed double-precision floating-point values in xmm2/m128/m64bcst to two signed doubleword integers in xmm1 using truncation subject to writemask k1.
EVEX.256.66.0F.W1 E6 /r VCVTTPD2DQ xmm1 {k1}{z}, ymm2/m256/m64bcst FV V/V AVX512VL AVX512F Convert four packed double-precision floating-point values in ymm2/m256/m64bcst to four signed doubleword integers in xmm1 using truncation subject to writemask k1.
EVEX.512.66.0F.W1 E6 /r VCVTTPD2DQ ymm1 {k1}{z}, zmm2/m512/m64bcst{sae} FV V/V AVX512F Convert eight packed double-precision floating-point values in zmm2/m512/m64bcst to eight signed doubleword integers in ymm1 using truncation subject to writemask k1.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3 Operand 4
RM ModRM:reg (w) ModRM:r/m (r) NA NA
FV ModRM:reg (w) ModRM:r/m (r) NA NA

Description

Converts two, four or eight packed double-precision floating-point values in the source operand (second operand) to two, four or eight 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.

EVEX encoded versions: 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 (MAX_VL-1:256) of the corresponding destination are zeroed.

VEX.256 encoded version: The source operand is a YMM register or 256- bit memory location. The destination operand is an XMM register. The upper bits (MAX_VL-1:128) of the corresponding ZMM register destination are zeroed.

VEX.128 encoded version: The source operand is an XMM register or 128- bit memory location. The destination operand is a XMM register. The upper bits (MAX_VL-1:64) of the corresponding ZMM register destination are zeroed.

128-bit Legacy SSE version: The source operand is an XMM register or 128- bit memory location. The destination operand is an XMM register. The upper bits (MAX_VL-1:128) of the corresponding ZMM register destination are unmodified.

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

Operation


VCVTTPD2DQ (EVEX encoded versions) when src operand is a register

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
    i (cid:197) j * 32
    k (cid:197) j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] (cid:197)
        Convert_Double_Precision_Floating_Point_To_Integer_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] (cid:197) 0
        FI
    FI;
ENDFOR
DEST[MAX_VL-1:VL/2] (cid:197) 0


VCVTTPD2DQ (EVEX encoded versions) when src operand is a memory source

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
    i (cid:197) j * 32
    k (cid:197) j * 64
    IF k1[j] OR *no writemask*
        THEN
        IF (EVEX.b = 1)
            THEN
            DEST[i+31:i] (cid:197)
            Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
            ELSE
            DEST[i+31:i] (cid:197)
            Convert_Double_Precision_Floating_Point_To_Integer_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] (cid:197) 0
        FI
    FI;
ENDFOR
DEST[MAX_VL-1:VL/2] (cid:197) 0


VCVTTPD2DQ (VEX.256 encoded version)

DEST[31:0] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
DEST[63:32] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64])
DEST[95:64] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[191:128])
DEST[127:96] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[255:192)
DEST[MAX_VL-1:128](cid:197)0


VCVTTPD2DQ (VEX.128 encoded version)

DEST[31:0] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
DEST[63:32] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64])
DEST[MAX_VL-1:64](cid:197)0


CVTTPD2DQ (128-bit Legacy SSE version)

DEST[31:0] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
DEST[63:32] (cid:197)Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64])
DEST[127:64] (cid:197)0
DEST[MAX_VL-1:128] (unmodified)



Intel C/C++ Compiler Intrinsic Equivalent


VCVTTPD2DQ __m256i _mm512_cvttpd_epi32( __m512d a);
VCVTTPD2DQ __m256i _mm512_mask_cvttpd_epi32( __m256i s, __mmask8 k, __m512d a);
VCVTTPD2DQ __m256i _mm512_maskz_cvttpd_epi32( __mmask8 k, __m512d a);
VCVTTPD2DQ __m256i _mm512_cvtt_roundpd_epi32( __m512d a, int sae);
VCVTTPD2DQ __m256i _mm512_mask_cvtt_roundpd_epi32( __m256i s, __mmask8 k, __m512d a, int sae);
VCVTTPD2DQ __m256i _mm512_maskz_cvtt_roundpd_epi32( __mmask8 k, __m512d a, int sae);
VCVTTPD2DQ __m128i _mm256_mask_cvttpd_epi32( __m128i s, __mmask8 k, __m256d a);
VCVTTPD2DQ __m128i _mm256_maskz_cvttpd_epi32( __mmask8 k, __m256d a);
VCVTTPD2DQ __m128i _mm_mask_cvttpd_epi32( __m128i s, __mmask8 k, __m128d a);
VCVTTPD2DQ __m128i _mm_maskz_cvttpd_epi32( __mmask8 k, __m128d a);
VCVTTPD2DQ __m128i _mm256_cvttpd_epi32 (__m256d src);
CVTTPD2DQ __m128i _mm_cvttpd_epi32 (__m128d src);



SIMD Floating-Point Exceptions


Invalid, Precision


Other Exceptions





VEX-encoded instructions, see Exceptions Type 2;



EVEX-encoded instructions, see Exceptions Type E2.



If VEX.vvvv != 1111B or EVEX.vvvv != 1111B.