PMINUB/PMINUW — Minimum of Packed Unsigned Integers

1. See note in Section 2.5, “Intel® AVX and Intel® SSE Instruction Exception Classification,” in the Intel^® 64 and IA-32 Architectures Software Developer’s Manual, Volume 2A, and Section 23.25.3, “Exception Conditions of Legacy SIMD Instructions Operating on MMX Registers,” in the Intel^® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3B.

Instruction Operand Encoding ¶

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 (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 (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*
                THEN *DEST[i+7:i] remains unchanged*
                ELSE ; zeroing-masking
                    DEST[i+7:i] := 0
            FI
    FI;
ENDFOR;
DEST[MAXVL-1:VL] := 0

PMINUW (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 Table 2-21, “Type 4 Class Exception Conditions.”

EVEX-encoded instruction, see Exceptions Type E4.nb in Table 2-49, “Type E4 Class Exception Conditions.”