모두의 코드
VPBLENDMD, VPBLENDMQs (Intel x86/64 assembly instruction)

작성일 : 2020-09-01 이 글은 609 번 읽혔습니다.

VPBLENDMD, VPBLENDMQ

Blend Int32/Int64 Vectors Using an OpMask Control

참고 사항

아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.

Opcode/
Instruction

Op /
En

64/32
bit Mode
Support

CPUID
Feature
Flag

Description

EVEX.NDS.128.66.0F38.W0 64 /r
VPBLENDMD xmm1 {k1}{z} xmm2 xmm3/m128/m32bcst

FV

V/V

AVX512VL
AVX512F

Blend doubleword integer vector xmm2 and doubleword vector xmm3/m128/m32bcst and store the result in xmm1, under control mask.

EVEX.NDS.256.66.0F38.W0 64 /r
VPBLENDMD ymm1 {k1}{z} ymm2 ymm3/m256/m32bcst

FV

V/V

AVX512VL
AVX512F

Blend doubleword integer vector ymm2 and doubleword vector ymm3/m256/m32bcst and store the result in ymm1, under control mask.

EVEX.NDS.512.66.0F38.W0 64 /r
VPBLENDMD zmm1 {k1}{z} zmm2 zmm3/m512/m32bcst

FV

V/V

AVX512F

Blend doubleword integer vector zmm2 and doubleword vector zmm3/m512/m32bcst and store the result in zmm1, under control mask.

EVEX.NDS.128.66.0F38.W1 64 /r
VPBLENDMQ xmm1 {k1}{z} xmm2 xmm3/m128/m64bcst

FV

V/V

AVX512VL
AVX512F

Blend quadword integer vector xmm2 and quadword vector xmm3/m128/m64bcst and store the result in xmm1, under control mask.

EVEX.NDS.256.66.0F38.W1 64 /r
VPBLENDMQ ymm1 {k1}{z} ymm2 ymm3/m256/m64bcst

FV

V/V

AVX512VL
AVX512F

Blend quadword integer vector ymm2 and quadword vector ymm3/m256/m64bcst and store the result in ymm1, under control mask.

EVEX.NDS.512.66.0F38.W1 64 /r
VPBLENDMQ zmm1 {k1}{z} zmm2 zmm3/m512/m64bcst

FV

V/V

AVX512F

Blend quadword integer vector zmm2 and quadword vector zmm3/m512/m64bcst and store the result in zmm1, under control mask.

Instruction Operand Encoding

Op/En

Operand 1

Operand 2

Operand 3

Operand 4

FV

ModRM:reg (w)

EVEX.vvvv

ModRM:r/m (r)

NA

Description

Performs an element-by-element blending of dword/qword elements between the first source operand (the second operand) and the elements of the second source operand (the third operand) using an opmask register as select control. The blended result is written into the destination.

The destination and first source operands are ZMM registers. The second source operand can be a ZMM register, a 512-bit memory location or a 512-bit vector broadcasted from a 32-bit memory location.

The opmask register is not used as a writemask for this instruction. Instead, the mask is used as an element selector: every element of the destination is conditionally selected between first source or second source using the value of the related mask bit (0 for the first source operand, 1 for the second source operand).

If EVEX.z is set, the elements with corresponding mask bit value of 0 in the destination operand are zeroed.

Operation

VPBLENDMD (EVEX encoded versions)

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j <-  0 TO KL-1
    i <-  j * 32
    IF k1[j] OR *no controlmask*
          THEN
                IF (EVEX.b = 1) AND (SRC2 *is memory*)
                      THEN
                            DEST[i+31:i] <-  SRC2[31:0]
                      ELSE 
                            DEST[i+31:i] <-  SRC2[i+31:i]
                FI;
          ELSE 
                IF *merging-masking* ; merging-masking
                      THEN DEST[i+31:i] <-  SRC1[i+31:i]
                      ELSE  ; zeroing-masking
                            DEST[i+31:i] <-  0
                FI;
    FI;
ENDFOR
DEST[MAX_VL-1:VL] <-  0;

VPBLENDMD (EVEX encoded versions)

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j <-  0 TO KL-1
    i <-  j * 32
    IF k1[j] OR *no controlmask*
          THEN
                IF (EVEX.b = 1) AND (SRC2 *is memory*)
                      THEN
                            DEST[i+31:i] <-  SRC2[31:0]
                      ELSE 
                            DEST[i+31:i] <-  SRC2[i+31:i]
                FI;
          ELSE 
                IF *merging-masking* ; merging-masking
                      THEN DEST[i+31:i] <-  SRC1[i+31:i]
                      ELSE  ; zeroing-masking
                            DEST[i+31:i] <-  0
                FI;
    FI;
ENDFOR
DEST[MAX_VL-1:VL] <-  0

Intel C/C++ Compiler Intrinsic Equivalent

VPBLENDMD __m512i _mm512_mask_blend_epi32(__mmask16 k, __m512i a, __m512i b);
VPBLENDMD __m256i _mm256_mask_blend_epi32(__mmask8 m, __m256i a, __m256i b);
VPBLENDMD __m128i _mm_mask_blend_epi32(__mmask8 m, __m128i a, __m128i b);
VPBLENDMQ __m512i _mm512_mask_blend_epi64(__mmask8 k, __m512i a, __m512i b);
VPBLENDMQ __m256i _mm256_mask_blend_epi64(__mmask8 m, __m256i a, __m256i b);
VPBLENDMQ __m128i _mm_mask_blend_epi64(__mmask8 m, __m128i a, __m128i b);

SIMD Floating-Point Exceptions

None

Other Exceptions

See Exceptions Type E4.

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