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Henk-Jan Lebbink edited this page May 28, 2019 · 4 revisions

VPSHRDVW / VPSHRDVD / VPSHRDVQ — Concatenate and Variable Shift Packed Data Right Logical

Opcode/ Instruction Op/ En 64/32 bit Mode Support CPUID Feature Flag Description
EVEX.128.66.0F38.W1 72 /r VPSHRDVW xmm1{k1}{z}, xmm2, xmm3/m128 A V/V AVX512_VBMI2 AVX512VL Concatenate xmm1 and xmm2, extract result shifted to the right by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W1 72 /r VPSHRDVW ymm1{k1}{z}, ymm2, ymm3/m256 A V/V AVX512_VBMI2 AVX512VL Concatenate ymm1 and ymm2, extract result shifted to the right by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W1 72 /r VPSHRDVW zmm1{k1}{z}, zmm2, zmm3/m512 A V/V AVX512_VBMI2 Concatenate zmm1 and zmm2, extract result shifted to the right by value in zmm3/m512 into zmm1.
EVEX.128.66.0F38.W0 73 /r VPSHRDVD xmm1{k1}{z}, xmm2, xmm3/m128/m32bcst B V/V AVX512_VBMI2 AVX512VL Concatenate xmm1 and xmm2, extract result shifted to the right by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W0 73 /r VPSHRDVD ymm1{k1}{z}, ymm2, ymm3/m256/m32bcst B V/V AVX512_VBMI2 AVX512VL Concatenate ymm1 and ymm2, extract result shifted to the right by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W0 73 /r VPSHRDVD zmm1{k1}{z}, zmm2, zmm3/m512/m32bcst B V/V AVX512_VBMI2 Concatenate zmm1 and zmm2, extract result shifted to the right by value in zmm3/m512 into zmm1.
EVEX.128.66.0F38.W1 73 /r VPSHRDVQ xmm1{k1}{z}, xmm2, xmm3/m128/m64bcst B V/V AVX512_VBMI2 AVX512VL Concatenate xmm1 and xmm2, extract result shifted to the right by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W1 73 /r VPSHRDVQ ymm1{k1}{z}, ymm2, ymm3/m256/m64bcst B V/V AVX512_VBMI2 AVX512VL Concatenate ymm1 and ymm2, extract result shifted to the right by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W1 73 /r VPSHRDVQ zmm1{k1}{z}, zmm2, zmm3/m512/m64bcst B V/V AVX512_VBMI2 Concatenate zmm1 and zmm2, extract result shifted to the right by value in zmm3/m512 into zmm1.

Instruction Operand Encoding

Op/En Tuple Operand 1 Operand 2 Operand 3 Operand 4
A Full Mem ModRM:reg (r, w) EVEX.vvvv ModRM:r/m (r) NA
B Full ModRM:reg (r, w) EVEX.vvvv ModRM:r/m (r) NA

Description

Concatenate packed data, extract result shifted to the right by variable value.

This instruction supports memory fault suppression.

Operation

VPSHRDVW DEST, SRC2, SRC3

(KL, VL) = (8, 128), (16, 256), (32, 512)
FOR j ← 0 TO KL-1:
    IF MaskBit(j) OR *no writemask*:
        DEST.word[j] ← concat(SRC2.word[j], DEST.word[j]) >> (SRC3.word[j] & 15)
    ELSE IF *zeroing*:
        DEST.word[j] ← 0
    *ELSE DEST.word[j] remains unchanged*
DEST[MAX_VL-1:VL] ← 0

VPSHRDVD DEST, SRC2, SRC3

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j ← 0 TO KL-1:
    IF SRC3 is broadcast memop:
        tsrc3 ← SRC3.dword[0]
    ELSE:
        tsrc3 ← SRC3.dword[j]
    IF MaskBit(j) OR *no writemask*:
        DEST.dword[j] ← concat(SRC2.dword[j], DEST.dword[j]) >> (tsrc3 & 31)
    ELSE IF *zeroing*:
        DEST.dword[j] ← 0
    *ELSE DEST.dword[j] remains unchanged*
DEST[MAX_VL-1:VL] ← 0

VPSHRDVQ DEST, SRC2, SRC3

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j ← 0 TO KL-1:
    IF SRC3 is broadcast memop:
        tsrc3 ← SRC3.qword[0]
    ELSE:
        tsrc3 ← SRC3.qword[j]
    IF MaskBit(j) OR *no writemask*:
        DEST.qword[j] ← concat(SRC2.qword[j], DEST.qword[j]) >> (tsrc3 & 63)
    ELSE IF *zeroing*:
        DEST.qword[j] ← 0
    *ELSE DEST.qword[j] remains unchanged*
DEST[MAX_VL-1:VL] ← 0

Intel C/C++ Compiler Intrinsic Equivalent

VPSHRDVQ __m128i  _mm_shrdv_epi64(__m128i, __m128i, __m128i);
VPSHRDVQ __m128i  _mm_mask_shrdv_epi64(__m128i, __mmask8, __m128i, __m128i);
VPSHRDVQ __m128i  _mm_maskz_shrdv_epi64(__mmask8, __m128i, __m128i, __m128i);
VPSHRDVQ __m256i  _mm256_shrdv_epi64(__m256i, __m256i, __m256i);
VPSHRDVQ __m256i  _mm256_mask_shrdv_epi64(__m256i, __mmask8, __m256i, __m256i);
VPSHRDVQ __m256i  _mm256_maskz_shrdv_epi64(__mmask8, __m256i, __m256i, __m256i);
VPSHRDVQ __m512i  _mm512_shrdv_epi64(__m512i, __m512i, __m512i);
VPSHRDVQ __m512i  _mm512_mask_shrdv_epi64(__m512i, __mmask8, __m512i, __m512i);
VPSHRDVQ __m512i  _mm512_maskz_shrdv_epi64(__mmask8, __m512i, __m512i, __m512i);
VPSHRDVD __m128i _mm_shrdv_epi32(__m128i, __m128i, __m128i);
VPSHRDVD __m128i _mm_mask_shrdv_epi32(__m128i, __mmask8, __m128i, __m128i);
VPSHRDVD __m128i _mm_maskz_shrdv_epi32(__mmask8, __m128i, __m128i, __m128i);
VPSHRDVD __m256i _mm256_shrdv_epi32(__m256i, __m256i, __m256i);
VPSHRDVD __m256i _mm256_mask_shrdv_epi32(__m256i, __mmask8, __m256i, __m256i);
VPSHRDVD __m256i _mm256_maskz_shrdv_epi32(__mmask8, __m256i, __m256i, __m256i);
VPSHRDVD __m512i _mm512_shrdv_epi32(__m512i, __m512i, __m512i);
VPSHRDVD __m512i _mm512_mask_shrdv_epi32(__m512i, __mmask16, __m512i, __m512i);
VPSHRDVD __m512i _mm512_maskz_shrdv_epi32(__mmask16, __m512i, __m512i, __m512i);
VPSHRDVW __m128i _mm_shrdv_epi16(__m128i, __m128i, __m128i);
VPSHRDVW __m128i _mm_mask_shrdv_epi16(__m128i, __mmask8, __m128i, __m128i);
VPSHRDVW __m128i _mm_maskz_shrdv_epi16(__mmask8, __m128i, __m128i, __m128i);
VPSHRDVW __m256i _mm256_shrdv_epi16(__m256i, __m256i, __m256i);
VPSHRDVW __m256i _mm256_mask_shrdv_epi16(__m256i, __mmask16, __m256i, __m256i);
VPSHRDVW __m256i _mm256_maskz_shrdv_epi16(__mmask16, __m256i, __m256i, __m256i);
VPSHRDVW __m512i _mm512_shrdv_epi16(__m512i, __m512i, __m512i);
VPSHRDVW __m512i _mm512_mask_shrdv_epi16(__m512i, __mmask32, __m512i, __m512i);
VPSHRDVW __m512i _mm512_maskz_shrdv_epi16(__mmask32, __m512i, __m512i, __m512i);

SIMD Floating-Point Exceptions

None.

Other Exceptions

See Type E4.

Source: Intel® Architecture Instruction Set Extensions and Future Features Programming Reference (May 2019)
Generated: 28-5-2019

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