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2025-07-08 02:23:29 -03:00
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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg" xmlns:x86="http://www.felixcloutier.com/x86"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><link rel="stylesheet" type="text/css" href="style.css"></link><title>CVTTPD2DQ
— Convert with Truncation Packed Double Precision Floating-Point Values toPacked Doubleword Integers</title></head><body><header><nav><ul><li><a href='index.html'>Index</a></li><li>December 2023</li></ul></nav></header><h1>CVTTPD2DQ
— Convert with Truncation Packed Double Precision Floating-Point Values toPacked Doubleword Integers</h1>
<table>
<tr>
<th>Opcode/Instruction</th>
<th>Op / En</th>
<th>64/32 bit Mode Support</th>
<th>CPUID Feature Flag</th>
<th>Description</th></tr>
<tr>
<td>66 0F E6 /r CVTTPD2DQ xmm1, xmm2/m128</td>
<td>A</td>
<td>V/V</td>
<td>SSE2</td>
<td>Convert two packed double precision floating-point values in xmm2/mem to two signed doubleword integers in xmm1 using truncation.</td></tr>
<tr>
<td>VEX.128.66.0F.WIG E6 /r VCVTTPD2DQ xmm1, xmm2/m128</td>
<td>A</td>
<td>V/V</td>
<td>AVX</td>
<td>Convert two packed double precision floating-point values in xmm2/mem to two signed doubleword integers in xmm1 using truncation.</td></tr>
<tr>
<td>VEX.256.66.0F.WIG E6 /r VCVTTPD2DQ xmm1, ymm2/m256</td>
<td>A</td>
<td>V/V</td>
<td>AVX</td>
<td>Convert four packed double precision floating-point values in ymm2/mem to four signed doubleword integers in xmm1 using truncation.</td></tr>
<tr>
<td>EVEX.128.66.0F.W1 E6 /r VCVTTPD2DQ xmm1 {k1}{z}, xmm2/m128/m64bcst</td>
<td>B</td>
<td>V/V</td>
<td>AVX512VL AVX512F</td>
<td>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.</td></tr>
<tr>
<td>EVEX.256.66.0F.W1 E6 /r VCVTTPD2DQ xmm1 {k1}{z}, ymm2/m256/m64bcst</td>
<td>B</td>
<td>V/V</td>
<td>AVX512VL AVX512F</td>
<td>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.</td></tr>
<tr>
<td>EVEX.512.66.0F.W1 E6 /r VCVTTPD2DQ ymm1 {k1}{z}, zmm2/m512/m64bcst{sae}</td>
<td>B</td>
<td>V/V</td>
<td>AVX512F</td>
<td>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.</td></tr></table>
<h2 id="instruction-operand-encoding">Instruction Operand Encoding<a class="anchor" href="#instruction-operand-encoding">
</a></h2>
<table>
<tr>
<th>Op/En</th>
<th>Tuple Type</th>
<th>Operand 1</th>
<th>Operand 2</th>
<th>Operand 3</th>
<th>Operand 4</th></tr>
<tr>
<td>A</td>
<td>N/A</td>
<td>ModRM:reg (w)</td>
<td>ModRM:r/m (r)</td>
<td>N/A</td>
<td>N/A</td></tr>
<tr>
<td>B</td>
<td>Full</td>
<td>ModRM:reg (w)</td>
<td>ModRM:r/m (r)</td>
<td>N/A</td>
<td>N/A</td></tr></table>
<h2 id="description">Description<a class="anchor" href="#description">
</a></h2>
<p>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).</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>Note: VEX.vvvv and EVEX.vvvv are reserved and must be 1111b, otherwise instructions will #UD.</p>
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<text lengthAdjust="spacingAndGlyphs" style="font-size: 8.414416800000026pt; fill: #000" textLength="9.17216670000002" x="156.96" y="57.81087779999996">X3</text>
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<figcaption><a href='cvttpd2dq.html#fig-3-15'>Figure 3-15</a>. VCVTTPD2DQ (VEX.256 encoded version)</figcaption></figure>
<h2 id="operation">Operation<a class="anchor" href="#operation">
</a></h2>
<h3 id="vcvttpd2dq--evex-encoded-versions--when-src-operand-is-a-register">VCVTTPD2DQ (EVEX Encoded Versions) When SRC Operand is a Register<a class="anchor" href="#vcvttpd2dq--evex-encoded-versions--when-src-operand-is-a-register">
</a></h3>
<pre>(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
</pre>
<h3 id="vcvttpd2dq--evex-encoded-versions--when-src-operand-is-a-memory-source">VCVTTPD2DQ (EVEX Encoded Versions) When SRC Operand is a Memory Source<a class="anchor" href="#vcvttpd2dq--evex-encoded-versions--when-src-operand-is-a-memory-source">
</a></h3>
<pre>(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
</pre>
<h3 id="vcvttpd2dq--vex-256-encoded-version-">VCVTTPD2DQ (VEX.256 Encoded Version)<a class="anchor" href="#vcvttpd2dq--vex-256-encoded-version-">
</a></h3>
<pre>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
</pre>
<h3 id="vcvttpd2dq--vex-128-encoded-version-">VCVTTPD2DQ (VEX.128 Encoded Version)<a class="anchor" href="#vcvttpd2dq--vex-128-encoded-version-">
</a></h3>
<pre>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
</pre>
<h3 id="cvttpd2dq--128-bit-legacy-sse-version-">CVTTPD2DQ (128-bit Legacy SSE Version)<a class="anchor" href="#cvttpd2dq--128-bit-legacy-sse-version-">
</a></h3>
<pre>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)
</pre>
<h2 id="intel-c-c++-compiler-intrinsic-equivalent">Intel C/C++ Compiler Intrinsic Equivalent<a class="anchor" href="#intel-c-c++-compiler-intrinsic-equivalent">
</a></h2>
<pre>VCVTTPD2DQ __m256i _mm512_cvttpd_epi32( __m512d a);
</pre>
<pre>VCVTTPD2DQ __m256i _mm512_mask_cvttpd_epi32( __m256i s, __mmask8 k, __m512d a);
</pre>
<pre>VCVTTPD2DQ __m256i _mm512_maskz_cvttpd_epi32( __mmask8 k, __m512d a);
</pre>
<pre>VCVTTPD2DQ __m256i _mm512_cvtt_roundpd_epi32( __m512d a, int sae);
</pre>
<pre>VCVTTPD2DQ __m256i _mm512_mask_cvtt_roundpd_epi32( __m256i s, __mmask8 k, __m512d a, int sae);
</pre>
<pre>VCVTTPD2DQ __m256i _mm512_maskz_cvtt_roundpd_epi32( __mmask8 k, __m512d a, int sae);
</pre>
<pre>VCVTTPD2DQ __m128i _mm256_mask_cvttpd_epi32( __m128i s, __mmask8 k, __m256d a);
</pre>
<pre>VCVTTPD2DQ __m128i _mm256_maskz_cvttpd_epi32( __mmask8 k, __m256d a);
</pre>
<pre>VCVTTPD2DQ __m128i _mm_mask_cvttpd_epi32( __m128i s, __mmask8 k, __m128d a);
</pre>
<pre>VCVTTPD2DQ __m128i _mm_maskz_cvttpd_epi32( __mmask8 k, __m128d a);
</pre>
<pre>VCVTTPD2DQ __m128i _mm256_cvttpd_epi32 (__m256d src);
</pre>
<pre>CVTTPD2DQ __m128i _mm_cvttpd_epi32 (__m128d src);
</pre>
<h2 class="exceptions" id="simd-floating-point-exceptions">SIMD Floating-Point Exceptions<a class="anchor" href="#simd-floating-point-exceptions">
</a></h2>
<p>Invalid, Precision.</p>
<h2 class="exceptions" id="other-exceptions">Other Exceptions<a class="anchor" href="#other-exceptions">
</a></h2>
<p>VEX-encoded instructions, see <span class="not-imported">Table 2-19</span>, “Type 2 Class Exception Conditions.”</p>
<p>EVEX-encoded instructions, see <span class="not-imported">Table 2-46</span>, “Type E2 Class Exception Conditions.”</p>
<p>Additionally:</p>
<table>
<tr>
<td>#UD</td>
<td>If VEX.vvvv != 1111B or EVEX.vvvv != 1111B.</td></tr></table><footer><p>
This UNOFFICIAL, mechanically-separated, non-verified reference is provided for convenience, but it may be
inc<span style="opacity: 0.2">omp</span>lete or b<sub>r</sub>oke<sub>n</sub> in various obvious or non-obvious
ways. Refer to <a href="https://software.intel.com/en-us/download/intel-64-and-ia-32-architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4">Intel® 64 and IA-32 Architectures Software Developer’s Manual</a> for anything serious.
</p></footer></body></html>
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