| Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID Feature Flag | Description |
|---|---|---|---|---|
| EVEX.128.F3.0F38.W1 2A /r VPBROADCASTMB2Q xmm1, k1 | RM | V/V | AVX512VL AVX512CD | Broadcast low byte value in k1 to two locations in xmm1. |
| EVEX.256.F3.0F38.W1 2A /r VPBROADCASTMB2Q ymm1, k1 | RM | V/V | AVX512VL AVX512CD | Broadcast low byte value in k1 to four locations in ymm1. |
| EVEX.512.F3.0F38.W1 2A /r VPBROADCASTMB2Q zmm1, k1 | RM | V/V | AVX512CD | Broadcast low byte value in k1 to eight locations in zmm1. |
| EVEX.128.F3.0F38.W0 3A /r VPBROADCASTMW2D xmm1, k1 | RM | V/V | AVX512VL AVX512CD | Broadcast low word value in k1 to four locations in xmm1. |
| EVEX.256.F3.0F38.W0 3A /r VPBROADCASTMW2D ymm1, k1 | RM | V/V | AVX512VL AVX512CD | Broadcast low word value in k1 to eight locations in ymm1. |
| EVEX.512.F3.0F38.W0 3A /r VPBROADCASTMW2D zmm1, k1 | RM | V/V | AVX512CD | Broadcast low word value in k1 to sixteen locations in zmm1. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| RM | ModRM:reg (w) | ModRM:r/m (r) | NA | NA |
Description
Broadcasts the zero-extended 64/32 bit value of the low byte/word of the source operand (the second operand) to each 64/32 bit element of the destination operand (the first operand). The source operand is an opmask register. The destination operand is a ZMM register (EVEX.512), YMM register (EVEX.256), or XMM register (EVEX.128).
EVEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.
Operation
VPBROADCASTMB2Q
(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
i (cid:197) j*64
DEST[i+63:i] (cid:197) ZeroExtend(SRC[7:0])
ENDFOR
DEST[MAX_VL-1:VL] (cid:197) 0
VPBROADCASTMW2D
(KL, VL) = (4, 128), (8, 256),(16, 512)
FOR j (cid:197) 0 TO KL-1
i (cid:197) j*32
DEST[i+31:i] (cid:197) ZeroExtend(SRC[15:0])
ENDFOR
DEST[MAX_VL-1:VL] (cid:197) 0
Intel C/C++ Compiler Intrinsic Equivalent
VPBROADCASTMB2Q __m512i _mm512_broadcastmb_epi64( __mmask8);
VPBROADCASTMW2D __m512i _mm512_broadcastmw_epi32( __mmask16);
VPBROADCASTMB2Q __m256i _mm256_broadcastmb_epi64( __mmask8);
VPBROADCASTMW2D __m256i _mm256_broadcastmw_epi32( __mmask8);
VPBROADCASTMB2Q __m128i _mm_broadcastmb_epi64( __mmask8);
VPBROADCASTMW2D __m128i _mm_broadcastmw_epi32( __mmask8);
SIMD Floating-Point Exceptions
None
Other Exceptions
EVEX-encoded instruction, see Exceptions Type E6NF.