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Source code

CVTTPD2DQ

Convert with Truncation Packed Double Precision Floating-Point Values to

stableVMJITAOTinstruction

Encodings

OpcodeInstructionOp/En64-bitCompat/LegacyDescription
66 0F E6 /rCVTTPD2DQ xmm1, xmm2/m128AValidValidConvert 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 /rVCVTTPD2DQ xmm1, xmm2/m128AValidValidConvert 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 /rVCVTTPD2DQ xmm1, ymm2/m256AValidValidConvert 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 /rVCVTTPD2DQ xmm1 {k1}{z}, xmm2/m128/m64bcstBValidValidConvert two packed double precision floating-point AVX512F) OR values in xmm2/m128/m64bcst to two signed AVX10.1 doubleword integers in xmm1 using truncation subject to writemask k1.
EVEX.256.66.0F.W1 E6 /rVCVTTPD2DQ xmm1 {k1}{z}, ymm2/m256/m64bcstBValidValidConvert four packed double precision floating-point AVX512F) OR values in ymm2/m256/m64bcst to four signed AVX10.1 doubleword integers in xmm1 using truncation subject to writemask k1.
EVEX.512.66.0F.W1 E6 /rVCVTTPD2DQ ymm1 {k1}{z}, zmm2/m512/m64bcst {sae}BValidValidConvert eight packed double precision floating-point OR AVX10.1 values in zmm2/m512/m64bcst to eight signed doubleword integers in ymm1 using truncation subject to writemask k1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

B

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

Tupla: Full

Measured cost

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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.

                 SRC       X3               X2                 X1          X0
                 DEST                    0              X3         X2  X1              X0

Figure 3-10. VCVTTPD2DQ (VEX.256 encoded version)

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 intrinsics

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 2-48, "Type E2 Class Exception Conditions."

Additionally:

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

Sources