PCMPGTB, PCMPGTW, PCMPGTD

Compare Packed Signed Integers for Greater Than

stableVMJITAOTinstruction

Encodings

Opcode	Instruction	Op/En	64-bit	Compat/Legacy	Description
`NP 0F 64 /r1`	`PCMPGTB mm, mm/m64`	A	Valid	Valid	Compare packed signed byte integers in mm and mm/m64 for greater than.
`66 0F 64 /r`	`PCMPGTB xmm1, xmm2/m128`	A	Valid	Valid	Compare packed signed byte integers in xmm1 and xmm2/m128 for greater than.
`NP 0F 65 /r1`	`PCMPGTW mm, mm/m64`	A	Valid	Valid	Compare packed signed word integers in mm and mm/m64 for greater than.
`66 0F 65 /r`	`PCMPGTW xmm1, xmm2/m128`	A	Valid	Valid	Compare packed signed word integers in xmm1 and xmm2/m128 for greater than.
`NP 0F 66 /r1`	`PCMPGTD mm, mm/m64`	A	Valid	Valid	Compare packed signed doubleword integers in mm and mm/m64 for greater than.
`66 0F 66 /r`	`PCMPGTD xmm1, xmm2/m128`	A	Valid	Valid	Compare packed signed doubleword integers in xmm1 and xmm2/m128 for greater than.
`VEX.128.66.0F.WIG 64 /r`	`VPCMPGTB xmm1, xmm2, xmm3/m128`	B	Valid	Valid	Compare packed signed byte integers in xmm2 and xmm3/m128 for greater than.
`VEX.128.66.0F.WIG 65 /r`	`VPCMPGTW xmm1, xmm2, xmm3/m128`	B	Valid	Valid	Compare packed signed word integers in xmm2 and xmm3/m128 for greater than.
`VEX.128.66.0F.WIG 66 /r`	`VPCMPGTD xmm1, xmm2, xmm3/m128`	B	Valid	Valid	Compare packed signed doubleword integers in xmm2 and xmm3/m128 for greater than.
`VEX.256.66.0F.WIG 64 /r`	`VPCMPGTB ymm1, ymm2, ymm3/m256`	B	Valid	Valid	Compare packed signed byte integers in ymm2 and ymm3/m256 for greater than.
`VEX.256.66.0F.WIG 65 /r`	`VPCMPGTW ymm1, ymm2, ymm3/m256`	B	Valid	Valid	Compare packed signed word integers in ymm2 and ymm3/m256 for greater than.
`VEX.256.66.0F.WIG 66 /r`	`VPCMPGTD ymm1, ymm2, ymm3/m256`	B	Valid	Valid	Compare packed signed doubleword integers in ymm2 and ymm3/m256 for greater than.
`EVEX.128.66.0F.W0 66 /r`	`VPCMPGTD k1 {k2}, xmm2, xmm3/m128/m32bcst`	C	Valid	Valid	Compare Greater between int32 vector xmm2 and AVX512F) OR int32 vector xmm3/m128/m32bcst, and set AVX10.1 vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.256.66.0F.W0 66 /r`	`VPCMPGTD k1 {k2}, ymm2, ymm3/m256/m32bcst`	C	Valid	Valid	Compare Greater between int32 vector ymm2 and AVX512F) OR int32 vector ymm3/m256/m32bcst, and set AVX10.1 vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.512.66.0F.W0 66 /r`	`VPCMPGTD k1 {k2}, zmm2, zmm3/m512/m32bcst`	C	Valid	Valid	Compare Greater between int32 elements in OR AVX10.1 zmm2 and zmm3/m512/m32bcst, and set destination k1 according to the comparison results under writemask. k2.
`EVEX.128.66.0F.WIG 64 /r`	`VPCMPGTB k1 {k2}, xmm2, xmm3/m128`	D	Valid	Valid	Compare packed signed byte integers in xmm2 AVX512BW) OR AVX10.1 and xmm3/m128 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.256.66.0F.WIG 64 /r`	`VPCMPGTB k1 {k2}, ymm2, ymm3/m256 Opcode/ Instruction`	D	Valid	Valid	Compare packed signed byte integers in ymm2 AVX512BW) OR AVX10.1 and ymm3/m256 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask. Op/ 64/32 bit CPUID Feature Description En Mode Suppor Flag t
`EVEX.512.66.0F.WIG 64 /r`	`VPCMPGTB k1 {k2}, zmm2, zmm3/m512`		d v	Valid	Compare packed signed byte integers in zmm2 and OR AVX10.1 zmm3/m512 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.128.66.0F.WIG 65 /r`	`VPCMPGTW k1 {k2}, xmm2, xmm3/m128`		d v	Valid	Compare packed signed word integers in xmm2 AVX512BW) OR AVX10.1 and xmm3/m128 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.256.66.0F.WIG 65 /r`	`VPCMPGTW k1 {k2}, ymm2, ymm3/m256`		d v	Valid	Compare packed signed word integers in ymm2 AVX512BW) OR AVX10.1 and ymm3/m256 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.
`EVEX.512.66.0F.WIG 65 /r`	`VPCMPGTW k1 {k2}, zmm2, zmm3/m512`		d v	Valid	Compare packed signed word integers in zmm2 OR AVX10.1 and zmm3/m512 for greater than, and set vector mask k1 to reflect the zero/nonzero status of each element of the result, under writemask.

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

modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
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

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

C

modrm.reg escrituraModRM byte, reg field (bits 5-3)
evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
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

D

modrm.reg escrituraModRM byte, reg field (bits 5-3)
evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
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 Mem

Measured cost

Loading measurements from arch-data...

Description

Performs an SIMD signed compare for the greater value of the packed byte, word, or doubleword integers in the destination operand (first operand) and the source operand (second operand). If a data element in the destination operand is greater than the corresponding date element in the source operand, the corresponding data element in the destination operand is set to all 1s; otherwise, it is set to all 0s.

The PCMPGTB instruction compares the corresponding signed byte integers in the destination and source operands; the PCMPGTW instruction compares the corresponding signed word integers in the destination and source operands; and the PCMPGTD instruction compares the corresponding signed doubleword integers in the destination and source operands.

In 64-bit mode and not encoded with VEX/EVEX, using a REX prefix in the form of REX.R permits this instruction to access additional registers (XMM8-XMM15).

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

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

VEX.256 encoded version: The first source operand is a YMM register. The second source operand is a YMM register or a 256-bit memory location. The destination operand is a YMM register.

EVEX encoded VPCMPGTD: The first source operand (second operand) is a ZMM/YMM/XMM register. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location or a 512/256/128-bit vector broadcasted from a 32-bit memory location. The destination operand (first operand) is a mask register updated according to the writemask k2.

EVEX encoded VPCMPGTB/W: The first source operand (second operand) is a ZMM/YMM/XMM register. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location. The destination operand (first operand) is a mask register updated according to the writemask k2.

Operation

PCMPGTB (With 64-bit Operands)
    IF DEST[7:0] > SRC[7:0]
          THEN DEST[7:0) := FFH;
          ELSE DEST[7:0] := 0; FI;
    (* Continue comparison of 2nd through 7th bytes in DEST and SRC *)
    IF DEST[63:56] > SRC[63:56]
          THEN DEST[63:56] := FFH;
          ELSE DEST[63:56] := 0; FI;

COMPARE_BYTES_GREATER (SRC1, SRC2)
    IF SRC1[7:0] > SRC2[7:0]
    THEN DEST[7:0] := FFH;
    ELSE DEST[7:0] := 0; FI;

(* Continue comparison of 2nd through 15th bytes in SRC1 and SRC2 *)
    IF SRC1[127:120] > SRC2[127:120]
    THEN DEST[127:120] := FFH;
    ELSE DEST[127:120] := 0; FI;

COMPARE_WORDS_GREATER (SRC1, SRC2)
    IF SRC1[15:0] > SRC2[15:0]
    THEN DEST[15:0] := FFFFH;
    ELSE DEST[15:0] := 0; FI;

(* Continue comparison of 2nd through 7th 16-bit words in SRC1 and SRC2 *)
    IF SRC1[127:112] > SRC2[127:112]
    THEN DEST[127:112] := FFFFH;
    ELSE DEST[127:112] := 0; FI;

COMPARE_DWORDS_GREATER (SRC1, SRC2)
    IF SRC1[31:0] > SRC2[31:0]
    THEN DEST[31:0] := FFFFFFFFH;
    ELSE DEST[31:0] := 0; FI;

(* Continue comparison of 2nd through 3rd 32-bit dwords in SRC1 and SRC2 *)
    IF SRC1[127:96] > SRC2[127:96]
    THEN DEST[127:96] := FFFFFFFFH;
    ELSE DEST[127:96] := 0; FI;

PCMPGTB (With 128-bit Operands)
DEST[127:0] := COMPARE_BYTES_GREATER(DEST[127:0],SRC[127:0])
DEST[MAXVL-1:128] (Unmodified)


VPCMPGTB (VEX.128 Encoded Version)
DEST[127:0] := COMPARE_BYTES_GREATER(SRC1,SRC2)
DEST[MAXVL-1:128] := 0

VPCMPGTB (VEX.256 Encoded Version)
DEST[127:0] := COMPARE_BYTES_GREATER(SRC1[127:0],SRC2[127:0])
DEST[255:128] := COMPARE_BYTES_GREATER(SRC1[255:128],SRC2[255:128])
DEST[MAXVL-1:256] := 0

VPCMPGTB (EVEX Encoded Versions)

(KL, VL) = (16, 128), (32, 256), (64, 512)

FOR j := 0 TO KL-1

i := j * 8

IF k2[j] OR *no writemask*

     THEN

            /* signed comparison */

            CMP := SRC1[i+7:i] > SRC2[i+7:i];

            IF CMP = TRUE

            THEN DEST[j] := 1;

            ELSE DEST[j] := 0; FI;

     ELSE DEST[j] := 0                         ; zeroing-masking onlyFI;

FI;

ENDFOR

DEST[MAX_KL-1:KL] := 0

PCMPGTW (With 64-bit Operands)
    IF DEST[15:0] > SRC[15:0]
          THEN DEST[15:0] := FFFFH;
          ELSE DEST[15:0] := 0; FI;
    (* Continue comparison of 2nd and 3rd words in DEST and SRC *)
    IF DEST[63:48] > SRC[63:48]
          THEN DEST[63:48] := FFFFH;
          ELSE DEST[63:48] := 0; FI;

PCMPGTW (With 128-bit Operands)
DEST[127:0] := COMPARE_WORDS_GREATER(DEST[127:0],SRC[127:0])
DEST[MAXVL-1:128] (Unmodified)

VPCMPGTW (VEX.128 Encoded Version)
DEST[127:0] := COMPARE_WORDS_GREATER(SRC1,SRC2)
DEST[MAXVL-1:128] := 0

VPCMPGTW (VEX.256 Encoded Version)
DEST[127:0] := COMPARE_WORDS_GREATER(SRC1[127:0],SRC2[127:0])
DEST[255:128] := COMPARE_WORDS_GREATER(SRC1[255:128],SRC2[255:128])
DEST[MAXVL-1:256] := 0


VPCMPGTW (EVEX Encoded Versions)

(KL, VL) = (8, 128), (16, 256), (32, 512)

FOR j := 0 TO KL-1

i := j * 16

IF k2[j] OR *no writemask*

     THEN

             /* signed comparison */

             CMP := SRC1[i+15:i] > SRC2[i+15:i];

             IF CMP = TRUE

                  THEN DEST[j] := 1;

                  ELSE DEST[j] := 0; FI;

     ELSE DEST[j] := 0                     ; zeroing-masking onlyFI;

FI;

ENDFOR

DEST[MAX_KL-1:KL] := 0

PCMPGTD (With 64-bit Operands)
    IF DEST[31:0] > SRC[31:0]
          THEN DEST[31:0] := FFFFFFFFH;
          ELSE DEST[31:0] := 0; FI;
    IF DEST[63:32] > SRC[63:32]
          THEN DEST[63:32] := FFFFFFFFH;
          ELSE DEST[63:32] := 0; FI;

PCMPGTD (With 128-bit Operands)
DEST[127:0] := COMPARE_DWORDS_GREATER(DEST[127:0],SRC[127:0])
DEST[MAXVL-1:128] (Unmodified)

VPCMPGTD (VEX.128 Encoded Version)
DEST[127:0] := COMPARE_DWORDS_GREATER(SRC1,SRC2)
DEST[MAXVL-1:128] := 0

VPCMPGTD (VEX.256 Encoded Version)
DEST[127:0] := COMPARE_DWORDS_GREATER(SRC1[127:0],SRC2[127:0])
DEST[255:128] := COMPARE_DWORDS_GREATER(SRC1[255:128],SRC2[255:128])
DEST[MAXVL-1:256] := 0

VPCMPGTD (EVEX Encoded Versions)

(KL, VL) = (4, 128), (8, 256), (8, 512)

FOR j := 0 TO KL-1

i := j * 32

IF k2[j] OR *no writemask*

     THEN

             /* signed comparison */

             IF (EVEX.b = 1) AND (SRC2 *is memory*)

                  THEN CMP := SRC1[i+31:i] > SRC2[31:0];

                  ELSE CMP := SRC1[i+31:i] > SRC2[i+31:i];

             FI;

             IF CMP = TRUE

                  THEN DEST[j] := 1;

                  ELSE DEST[j] := 0; FI;

     ELSE DEST[j] := 0                     ; zeroing-masking only

FI;

ENDFOR


DEST[MAX_KL-1:KL] := 0

Intel C/C++ compiler intrinsics

VPCMPGTB __mmask64 _mm512_cmpgt_epi8_mask(__m512i a, __m512i b);
VPCMPGTB __mmask64 _mm512_mask_cmpgt_epi8_mask(__mmask64 k, __m512i a, __m512i b);
VPCMPGTB __mmask32 _mm256_cmpgt_epi8_mask(__m256i a, __m256i b);
VPCMPGTB __mmask32 _mm256_mask_cmpgt_epi8_mask(__mmask32 k, __m256i a, __m256i b);
VPCMPGTB __mmask16 _mm_cmpgt_epi8_mask(__m128i a, __m128i b);
VPCMPGTB __mmask16 _mm_mask_cmpgt_epi8_mask(__mmask16 k, __m128i a, __m128i b);
VPCMPGTD __mmask16 _mm512_cmpgt_epi32_mask(__m512i a, __m512i b);
VPCMPGTD __mmask16 _mm512_mask_cmpgt_epi32_mask(__mmask16 k, __m512i a, __m512i b);
VPCMPGTD __mmask8 _mm256_cmpgt_epi32_mask(__m256i a, __m256i b);
VPCMPGTD __mmask8 _mm256_mask_cmpgt_epi32_mask(__mmask8 k, __m256i a, __m256i b);
VPCMPGTD __mmask8 _mm_cmpgt_epi32_mask(__m128i a, __m128i b);
VPCMPGTD __mmask8 _mm_mask_cmpgt_epi32_mask(__mmask8 k, __m128i a, __m128i b);
VPCMPGTW __mmask32 _mm512_cmpgt_epi16_mask(__m512i a, __m512i b);
VPCMPGTW __mmask32 _mm512_mask_cmpgt_epi16_mask(__mmask32 k, __m512i a, __m512i b);
VPCMPGTW __mmask16 _mm256_cmpgt_epi16_mask(__m256i a, __m256i b);
VPCMPGTW __mmask16 _mm256_mask_cmpgt_epi16_mask(__mmask16 k, __m256i a, __m256i b);
VPCMPGTW __mmask8 _mm_cmpgt_epi16_mask(__m128i a, __m128i b);
VPCMPGTW __mmask8 _mm_mask_cmpgt_epi16_mask(__mmask8 k, __m128i a, __m128i b);
PCMPGTB __m64 _mm_cmpgt_pi8 (__m64 m1, __m64 m2) PCMPGTW __m64 _mm_cmpgt_pi16 (__m64 m1, __m64 m2) PCMPGTD __m64 _mm_cmpgt_pi32 (__m64 m1, __m64 m2) (V)PCMPGTB __m128i _mm_cmpgt_epi8 ( __m128i a, __m128i b) (V)PCMPGTW __m128i _mm_cmpgt_epi16 ( __m128i a, __m128i b) (V)DCMPGTD __m128i _mm_cmpgt_epi32 ( __m128i a, __m128i b) VPCMPGTB __m256i _mm256_cmpgt_epi8 ( __m256i a, __m256i b) VPCMPGTW __m256i _mm256_cmpgt_epi16 ( __m256i a, __m256i b) VPCMPGTD __m256i _mm256_cmpgt_epi32 ( __m256i a, __m256i b);

Flags affected

None.

Numeric Exceptions

None.

Other Exceptions

Non-EVEX-encoded instruction, see Table 2-21, "Type 4 Class Exception Conditions."

EVEX-encoded VPCMPGTD, see Table 2-51, "Type E4 Class Exception Conditions."

EVEX-encoded VPCMPGTB/W, see Exceptions Type E4.nb in Table 2-51, "Type E4 Class Exception Conditions."

PCMPGTB, PCMPGTW, PCMPGTD

Encodings

Operand encoding

A

B

C

D

Measured cost

Description#

Operation#

Intel C/C++ compiler intrinsics#

Flags affected#

Numeric Exceptions#