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PBLENDW
PBLENDW — Blend Packed Words
| Opcode/ Instruction | Op/ En | 64/32 bit Mode Support | CPUID Feature Flag | Description |
| 66 0F 3A 0E /r ib PBLENDW xmm1, xmm2/m128, imm8 | RMI | V/V | SSE4_1 | Select words from xmm1 and xmm2/m128 from mask specified in imm8 and store the values into xmm1. |
| VEX.NDS.128.66.0F3A.WIG 0E /r ib VPBLENDW xmm1, xmm2, xmm3/m128, imm8 | RVMI V/V | AVX | Select words from xmm2 and xmm3/m128 from mask specified in imm8 and store the values into xmm1. | |
| VEX.NDS.256.66.0F3A.WIG 0E /r ib VPBLENDW ymm1, ymm2, ymm3/m256, imm8 | RVMI V/V | AVX2 | Select words from ymm2 and ymm3/m256 from mask specified in imm8 and store the values into ymm1. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| RMI | ModRM:reg (r, w) | ModRM:r/m (r) | imm8 | NA |
| RVMI | ModRM:reg (w) | VEX.vvvv (r) | ModRM:r/m (r) | imm8 |
Words from the source operand (second operand) are conditionally written to the destination operand (first operand) depending on bits in the immediate operand (third operand). The immediate bits (bits 7:0) form a mask that determines whether the corresponding word in the destination is copied from the source. If a bit in the mask, corresponding to a word, is “1", then the word is copied, else the word element in the destination operand is unchanged.
128-bit Legacy SSE version: The second source operand can be an XMM register or a 128-bit memory location. The first source and destination operands 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 and destination operands 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.
IF (imm8[0] = 1) THEN DEST[15:0] ← SRC[15:0]
ELSE DEST[15:0] ← DEST[15:0]
IF (imm8[1] = 1) THEN DEST[31:16] ← SRC[31:16]
ELSE DEST[31:16] ← DEST[31:16]
IF (imm8[2] = 1) THEN DEST[47:32] ← SRC[47:32]
ELSE DEST[47:32] ← DEST[47:32]
IF (imm8[3] = 1) THEN DEST[63:48] ← SRC[63:48]
ELSE DEST[63:48] ← DEST[63:48]
IF (imm8[4] = 1) THEN DEST[79:64] ← SRC[79:64]
ELSE DEST[79:64] ← DEST[79:64]
IF (imm8[5] = 1) THEN DEST[95:80] ← SRC[95:80]
ELSE DEST[95:80] ← DEST[95:80]
IF (imm8[6] = 1) THEN DEST[111:96] ← SRC[111:96]
ELSE DEST[111:96] ← DEST[111:96]
IF (imm8[7] = 1) THEN DEST[127:112] ← SRC[127:112]
ELSE DEST[127:112] ← DEST[127:112]IF (imm8[0] = 1) THEN DEST[15:0] ← SRC2[15:0]
ELSE DEST[15:0] ← SRC1[15:0]
IF (imm8[1] = 1) THEN DEST[31:16] ← SRC2[31:16]
ELSE DEST[31:16] ← SRC1[31:16]
IF (imm8[2] = 1) THEN DEST[47:32] ← SRC2[47:32]
ELSE DEST[47:32] ← SRC1[47:32]
IF (imm8[3] = 1) THEN DEST[63:48] ← SRC2[63:48]
ELSE DEST[63:48] ← SRC1[63:48]
IF (imm8[4] = 1) THEN DEST[79:64] ← SRC2[79:64]
ELSE DEST[79:64] ← SRC1[79:64]
IF (imm8[5] = 1) THEN DEST[95:80] ← SRC2[95:80]
ELSE DEST[95:80] ← SRC1[95:80]
IF (imm8[6] = 1) THEN DEST[111:96] ← SRC2[111:96]
ELSE DEST[111:96] ← SRC1[111:96]
IF (imm8[7] = 1) THEN DEST[127:112] ← SRC2[127:112]
ELSE DEST[127:112] ← SRC1[127:112]
DEST[MAXVL-1:128] ← 0IF (imm8[0] == 1) THEN DEST[15:0] ← SRC2[15:0]
ELSE DEST[15:0] ← SRC1[15:0]
IF (imm8[1] == 1) THEN DEST[31:16] ← SRC2[31:16]
ELSE DEST[31:16] ← SRC1[31:16]
IF (imm8[2] == 1) THEN DEST[47:32] ← SRC2[47:32]
ELSE DEST[47:32] ← SRC1[47:32]
IF (imm8[3] == 1) THEN DEST[63:48] ← SRC2[63:48]
ELSE DEST[63:48] ← SRC1[63:48]
IF (imm8[4] == 1) THEN DEST[79:64] ← SRC2[79:64]
ELSE DEST[79:64] ← SRC1[79:64]
IF (imm8[5] == 1) THEN DEST[95:80] ← SRC2[95:80]
ELSE DEST[95:80] ← SRC1[95:80]
IF (imm8[6] == 1) THEN DEST[111:96] ← SRC2[111:96]
ELSE DEST[111:96] ← SRC1[111:96]
IF (imm8[7] == 1) THEN DEST[127:112] ← SRC2[127:112]
ELSE DEST[127:112] ← SRC1[127:112]
IF (imm8[0] == 1) THEN DEST[143:128] ← SRC2[143:128]
ELSE DEST[143:128] ← SRC1[143:128]
IF (imm8[1] == 1) THEN DEST[159:144] ← SRC2[159:144]
ELSE DEST[159:144] ← SRC1[159:144]
IF (imm8[2] == 1) THEN DEST[175:160] ← SRC2[175:160]
ELSE DEST[175:160] ← SRC1[175:160]
IF (imm8[3] == 1) THEN DEST[191:176] ← SRC2[191:176]
ELSE DEST[191:176] ← SRC1[191:176]
IF (imm8[4] == 1) THEN DEST[207:192] ← SRC2[207:192]
ELSE DEST[207:192] ← SRC1[207:192]
IF (imm8[5] == 1) THEN DEST[223:208] ← SRC2[223:208]
ELSE DEST[223:208] ← SRC1[223:208]
IF (imm8[6] == 1) THEN DEST[239:224] ← SRC2[239:224]
ELSE DEST[239:224] ← SRC1[239:224]
IF (imm8[7] == 1) THEN DEST[255:240] ← SRC2[255:240]
ELSE DEST[255:240] ← SRC1[255:240](V)PBLENDW:
__m128i _mm_blend_epi16 (__m128i v1, __m128i v2, const int mask);
VPBLENDW:
__m256i _mm256_blend_epi16 (__m256i v1, __m256i v2, const int mask)None.
None.
See Exceptions Type 4; additionally
#UD If VEX.L = 1 and AVX2 = 0.
Source: Intel® Architecture Software Developer's Manual (May 2018)
Generated: 5-6-2018