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Henk-Jan Lebbink edited this page Jun 6, 2018 · 14 revisions

PMINUB / PMINUW / VPMINUB / VPMINUW — Minimum of Packed Unsigned Integers

Opcode/ Instruction Op / En 64/32 bit Mode Support CPUID Feature Flag Description
NP 0F DA /r1 PMINUB mm1, mm2/m64 A V/V SSE Compare unsigned byte integers in mm2/m64 and mm1 and returns minimum values.
66 0F DA /r PMINUB xmm1, xmm2/m128 A V/V SSE2 Compare packed unsigned byte integers in xmm1 and xmm2/m128 and store packed minimum values in xmm1.
66 0F 38 3A/r PMINUW xmm1, xmm2/m128 A V/V SSE4_1 Compare packed unsigned word integers in xmm2/m128 and xmm1 and store packed minimum values in xmm1.
VEX.NDS.128.66.0F DA /r VPMINUB xmm1, xmm2, xmm3/m128 B V/V AVX Compare packed unsigned byte integers in xmm2 and xmm3/m128 and store packed minimum values in xmm1.
VEX.NDS.128.66.0F38 3A/r VPMINUW xmm1, xmm2, xmm3/m128 B V/V AVX Compare packed unsigned word integers in xmm3/m128 and xmm2 and return packed minimum values in xmm1.
VEX.NDS.256.66.0F DA /r VPMINUB ymm1, ymm2, ymm3/m256 B V/V AVX2 Compare packed unsigned byte integers in ymm2 and ymm3/m256 and store packed minimum values in ymm1.
VEX.NDS.256.66.0F38 3A/r VPMINUW ymm1, ymm2, ymm3/m256 B V/V AVX2 Compare packed unsigned word integers in ymm3/m256 and ymm2 and return packed minimum values in ymm1.
EVEX.NDS.128.66.0F DA /r VPMINUB xmm1 {k1}{z}, xmm2, xmm3/m128 C V/V AVX512VL AVX512BW Compare packed unsigned byte integers in xmm2 and xmm3/m128 and store packed minimum values in xmm1 under writemask k1.
EVEX.NDS.256.66.0F DA /r VPMINUB ymm1 {k1}{z}, ymm2, ymm3/m256 C V/V AVX512VL AVX512BW Compare packed unsigned byte integers in ymm2 and ymm3/m256 and store packed minimum values in ymm1 under writemask k1.
EVEX.NDS.512.66.0F DA /r VPMINUB zmm1 {k1}{z}, zmm2, zmm3/m512 C V/V AVX512BW Compare packed unsigned byte integers in zmm2 and zmm3/m512 and store packed minimum values in zmm1 under writemask k1.
EVEX.NDS.128.66.0F38 3A/r VPMINUW xmm1{k1}{z}, xmm2, xmm3/m128 C V/V AVX512VL AVX512BW Compare packed unsigned word integers in xmm3/m128 and xmm2 and return packed minimum values in xmm1 under writemask k1.
EVEX.NDS.256.66.0F38 3A/r VPMINUW ymm1{k1}{z}, ymm2, ymm3/m256 C V/V AVX512VL AVX512BW Compare packed unsigned word integers in ymm3/m256 and ymm2 and return packed minimum values in ymm1 under writemask k1.
EVEX.NDS.512.66.0F38 3A/r VPMINUW zmm1{k1}{z}, zmm2, zmm3/m512 C V/V AVX512BW Compare packed unsigned word integers in zmm3/m512 and zmm2 and return packed minimum values in zmm1 under writemask k1.
NOTES: 1. See note in Section 2.4, “AVX and SSE Instruction Exception Specification” in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 2A and Section 22.25.3, “Exception Conditions of Legacy SIMD Instructions Operating on MMX Registers” in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3A.

Instruction Operand Encoding

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

Description

Performs a SIMD compare of the packed unsigned byte or word integers in the second source operand and the first source operand and returns the minimum value for each pair of integers to the destination operand.

Legacy SSE version PMINUB: The source operand can be an MMX technology register or a 64-bit memory location. The destination operand can be an MMX technology register.

128-bit Legacy SSE version: The first source and destination operands are XMM registers. The second source operand is an XMM register or a 128-bit memory location. Bits (MAXVL-1:128) of the corresponding destination register remain unchanged.

VEX.128 encoded version: The first source and destination operands are XMM registers. The second source operand is an XMM register or a 128-bit memory location. Bits (MAXVL-1:128) of the corresponding destination register are zeroed.

VEX.256 encoded version: The second source operand can be an YMM register or a 256-bit memory location. The first source and destination operands are YMM registers.

EVEX encoded versions: The first source operand is a ZMM/YMM/XMM register; The second source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operand is conditionally updated based on writemask k1.

Operation

PMINUB (for 64-bit operands)

    IF DEST[7:0] < SRC[17:0] THEN
        DEST[7:0] ← DEST[7:0];
    ELSE
        DEST[7:0] ← SRC[7:0]; FI;
    (* Repeat operation for 2nd through 7th bytes in source and destination operands *)
    IF DEST[63:56] < SRC[63:56] THEN
        DEST[63:56] ← DEST[63:56];
    ELSE
        DEST[63:56] ← SRC[63:56]; FI;

PMINUB instruction for 128-bit operands:

    IF DEST[7:0] < SRC[7:0] THEN
        DEST[7:0] ← DEST[7:0];
    ELSE
        DEST[15:0] ← SRC[7:0]; FI;
    (* Repeat operation for 2nd through 15th bytes in source and destination operands *)
    IF DEST[127:120] < SRC[127:120] THEN
        DEST[127:120] ← DEST[127:120];
    ELSE
        DEST[127:120] ← SRC[127:120]; FI;
DEST[MAXVL-1:128] (Unmodified)

VPMINUB (VEX.128 encoded version)

    IF SRC1[7:0] < SRC2[7:0] THEN
        DEST[7:0] ← SRC1[7:0];
    ELSE
        DEST[7:0] ← SRC2[7:0]; FI;
    (* Repeat operation for 2nd through 15th bytes in source and destination operands *)
    IF SRC1[127:120] < SRC2[127:120] THEN
        DEST[127:120] ← SRC1[127:120];
    ELSE
        DEST[127:120] ← SRC2[127:120]; FI;
DEST[MAXVL-1:128] ← 0

VPMINUB (VEX.256 encoded version)

    IF SRC1[7:0] < SRC2[7:0] THEN
        DEST[7:0] ← SRC1[7:0];
    ELSE
        DEST[15:0] ← SRC2[7:0]; FI;
    (* Repeat operation for 2nd through 31st bytes in source and destination operands *)
    IF SRC1[255:248] < SRC2[255:248] THEN
        DEST[255:248] ← SRC1[255:248];
    ELSE
        DEST[255:248] ← SRC2[255:248]; FI;
DEST[MAXVL-1:256] ← 0

VPMINUB (EVEX encoded versions)

(KL, VL) = (16, 128), (32, 256), (64, 512)
FOR j ← 0 TO KL-1
    i ← j * 8
    IF k1[j] OR *no writemask* THEN
        IF SRC1[i+7:i] < SRC2[i+7:i] 
            THEN DEST[i+7:i] ← SRC1[i+7:i];
            ELSE DEST[i+7:i] ← SRC2[i+7:i]; 
        FI;
        ELSE 
            IF *merging-masking*
                            ; merging-masking
                THEN *DEST[i+7:i] remains unchanged*
                ELSE 
                            ; zeroing-masking
                    DEST[i+7:i] ← 0
            FI
    FI;
ENDFOR;
DEST[MAXVL-1:VL] ← 0

PMINUW instruction for 128-bit operands:

    IF DEST[15:0] < SRC[15:0] THEN
        DEST[15:0] ← DEST[15:0];
    ELSE
        DEST[15:0] ← SRC[15:0]; FI;
    (* Repeat operation for 2nd through 7th words in source and destination operands *)
    IF DEST[127:112] < SRC[127:112] THEN
        DEST[127:112] ← DEST[127:112];
    ELSE
        DEST[127:112] ← SRC[127:112]; FI;
DEST[MAXVL-1:128] (Unmodified)

VPMINUW (VEX.128 encoded version)

    IF SRC1[15:0] < SRC2[15:0] THEN
        DEST[15:0] ← SRC1[15:0];
    ELSE
        DEST[15:0] ← SRC2[15:0]; FI;
    (* Repeat operation for 2nd through 7th words in source and destination operands *)
    IF SRC1[127:112] < SRC2[127:112] THEN
        DEST[127:112] ← SRC1[127:112];
    ELSE
        DEST[127:112] ← SRC2[127:112]; FI;
DEST[MAXVL-1:128] ← 0

VPMINUW (VEX.256 encoded version)

    IF SRC1[15:0] < SRC2[15:0] THEN
        DEST[15:0] ← SRC1[15:0];
    ELSE
        DEST[15:0] ← SRC2[15:0]; FI;
    (* Repeat operation for 2nd through 15th words in source and destination operands *)
    IF SRC1[255:240] < SRC2[255:240] THEN
        DEST[255:240] ← SRC1[255:240];
    ELSE
        DEST[255:240] ← SRC2[255:240]; FI;
DEST[MAXVL-1:256] ← 0

VPMINUW (EVEX encoded versions)

(KL, VL) = (8, 128), (16, 256), (32, 512)
FOR j ← 0 TO KL-1
    i ← j * 16
    IF k1[j] OR *no writemask* THEN
        IF SRC1[i+15:i] < SRC2[i+15:i] 
            THEN DEST[i+15:i] ← SRC1[i+15:i];
            ELSE DEST[i+15:i] ← SRC2[i+15:i]; 
        FI;
        ELSE 
            IF *merging-masking*
                            ; merging-masking
                THEN *DEST[i+15:i] remains unchanged*
                ELSE 
                            ; zeroing-masking
                    DEST[i+15:i] ← 0
            FI
    FI;
ENDFOR;
DEST[MAXVL-1:VL] ← 0

Intel C/C++ Compiler Intrinsic Equivalent

VPMINUB __m512i _mm512_min_epu8( __m512i a, __m512i b);
VPMINUB __m512i _mm512_mask_min_epu8(__m512i s, __mmask64 k, __m512i a, __m512i b);
VPMINUB __m512i _mm512_maskz_min_epu8( __mmask64 k, __m512i a, __m512i b);
VPMINUW __m512i _mm512_min_epu16( __m512i a, __m512i b);
VPMINUW __m512i _mm512_mask_min_epu16(__m512i s, __mmask32 k, __m512i a, __m512i b);
VPMINUW __m512i _mm512_maskz_min_epu16( __mmask32 k, __m512i a, __m512i b);
VPMINUB __m256i _mm256_mask_min_epu8(__m256i s, __mmask32 k, __m256i a, __m256i b);
VPMINUB __m256i _mm256_maskz_min_epu8( __mmask32 k, __m256i a, __m256i b);
VPMINUW __m256i _mm256_mask_min_epu16(__m256i s, __mmask16 k, __m256i a, __m256i b);
VPMINUW __m256i _mm256_maskz_min_epu16( __mmask16 k, __m256i a, __m256i b);
VPMINUB __m128i _mm_mask_min_epu8(__m128i s, __mmask16 k, __m128i a, __m128i b);
VPMINUB __m128i _mm_maskz_min_epu8( __mmask16 k, __m128i a, __m128i b);
VPMINUW __m128i _mm_mask_min_epu16(__m128i s, __mmask8 k, __m128i a, __m128i b);
VPMINUW __m128i _mm_maskz_min_epu16( __mmask8 k, __m128i a, __m128i b);
(V)PMINUB __m128i _mm_min_epu8 ( __m128i a, __m128i b)
(V)PMINUW __m128i _mm_min_epu16 ( __m128i a, __m128i b);
VPMINUB __m256i _mm256_min_epu8 ( __m256i a, __m256i b)
VPMINUW __m256i _mm256_min_epu16 ( __m256i a, __m256i b);
PMINUB: __m64 _m_min_pu8 (__m64 a, __m64 b)

SIMD Floating-Point Exceptions

None

Other Exceptions

Non-EVEX-encoded instruction, see Exceptions Type 4. EVEX-encoded instruction, see Exceptions Type E4.nb.

Source: Intel® Architecture Software Developer's Manual (May 2018)
Generated: 5-6-2018

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