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

Instruction Operand Encoding ¶

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 (MAXVL-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 (MAXVL-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 (MAXVL-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 (MAXVL-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 := 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_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] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL/2] := 0

VCVTTPD2DQ (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_Integer_Truncate(SRC[63:0])
                ELSE
                    DEST[i+31:i] :=
            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] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL/2] := 0

VCVTTPD2DQ (VEX.256 Encoded Version) ¶

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

VCVTTPD2DQ (VEX.128 Encoded Version) ¶

DEST[31:0] := Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
DEST[63:32] := Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64])
DEST[MAXVL-1:64] := 0

CVTTPD2DQ (128-bit Legacy SSE Version) ¶

DEST[31:0] := Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[63:0])
DEST[63:32] := Convert_Double_Precision_Floating_Point_To_Integer_Truncate(SRC[127:64])
DEST[127:64] := 0
DEST[MAXVL-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 Table 2-19, “Type 2 Class Exception Conditions.”

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

Additionally: