모두의 코드
PHADDW, PHADDDs (Intel x86/64 assembly instruction)
PHADDW, PHADDD
Packed Horizontal Add
참고 사항
아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.
Opcode/ | Op/ | 64/32 bit | CPUID | Description |
---|---|---|---|---|
| RM | V/V | SSSE3 | Add 16-bit integers horizontally, pack to mm1. |
| RM | V/V | SSSE3 | Add 16-bit integers horizontally, pack to xmm1. |
| RM | V/V | SSSE3 | Add 32-bit integers horizontally, pack to mm1. |
| RM | V/V | SSSE3 | Add 32-bit integers horizontally, pack to xmm1. |
| RVM | V/V | AVX | Add 16-bit integers horizontally, pack to xmm1. |
| RVM | V/V | AVX | Add 32-bit integers horizontally, pack to xmm1. |
| RVM | V/V | AVX2 | Add 16-bit signed integers horizontally, pack to ymm1. |
| RVM | V/V | AVX2 | Add 32-bit signed integers horizontally, pack to ymm1. |
See note in Section 2.4, "AVX and SSE Instruction Exception Specification" in the Intel(R) 64 and IA-32 Architectures Software Developer's Manual, Volume 2A and Section 22.25.3, "Exception Conditions of Legacy SIMD Instructions Operating on MMX Registers" in the Intel(R) 64 and IA-32 Architectures Software Developer's Manual, Volume 3A
Instruction Operand Encoding
Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
---|---|---|---|---|
RM | ModRM:reg (r, w) | ModRM:r/m (r) | NA | NA |
RVM | ModRM:reg (w) | VEX.vvvv (r) | ModRM:r/m (r) | NA |
Description
(V)PHADDW adds two adjacent 16-bit signed integers horizontally from the source and destination operands and packs the 16-bit signed results to the destination operand (first operand). (V)PHADDD adds two adjacent 32-bit signed integers horizontally from the source and destination operands and packs the 32-bit signed results to the destination operand (first operand). When the source operand is a 128-bit memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated.
Note that these instructions can operate on either unsigned or signed (two's complement notation) integers; however, it does not set bits in the EFLAGS register to indicate overflow and/or a carry. To prevent undetected over-flow conditions, software must control the ranges of the values operated on.
Legacy SSE instructions: Both operands can be MMX registers. The second source operand can be an MMX register or a 64-bit memory location.
128-bit Legacy SSE version: The first source and destination operands are XMM registers. The second source operand can be an XMM register or a 128-bit memory location. Bits (VLMAX-1:128) of the corresponding YMM destination register remain unchanged.
In 64-bit mode, use the REX prefix to access additional registers.
VEX.128 encoded version: The first source and destination operands are XMM registers. The second source operand can be an XMM register or a 128-bit memory location. Bits (VLMAX-1:128) of the corresponding YMM register are zeroed.
VEX.256 encoded version: Horizontal addition of two adjacent data elements of the low 16-bytes of the first and second source operands are packed into the low 16-bytes of the destination operand. Horizontal addition of two adjacent data elements of the high 16-bytes of the first and second source operands are packed into the high 16-bytes of the destination operand. The first source and destination operands are YMM registers. The second source operand can be an YMM register or a 256-bit memory location.
Note: VEX.L must be 0, otherwise the instruction will #UD.
Operation
PHADDW (with 64-bit operands)
mm1[15-0] = mm1[31-16] + mm1[15-0];
mm1[31-16] = mm1[63-48] + mm1[47-32];
mm1[47-32] = mm2/m64[31-16] + mm2/m64[15-0];
mm1[63-48] = mm2/m64[63-48] + mm2/m64[47-32];
PHADDW (with 128-bit operands)
xmm1[15-0] = xmm1[31-16] + xmm1[15-0];
xmm1[31-16] = xmm1[63-48] + xmm1[47-32];
xmm1[47-32] = xmm1[95-80] + xmm1[79-64];
xmm1[63-48] = xmm1[127-112] + xmm1[111-96];
xmm1[79-64] = xmm2/m128[31-16] + xmm2/m128[15-0];
xmm1[95-80] = xmm2/m128[63-48] + xmm2/m128[47-32];
xmm1[111-96] = xmm2/m128[95-80] + xmm2/m128[79-64];
xmm1[127-112] = xmm2/m128[127-112] + xmm2/m128[111-96];
VPHADDW (VEX.128 encoded version)
DEST[15:0] <- SRC1[31:16] + SRC1[15:0]
DEST[31:16] <- SRC1[63:48] + SRC1[47:32]
DEST[47:32] <- SRC1[95:80] + SRC1[79:64]
DEST[63:48] <- SRC1[127:112] + SRC1[111:96]
DEST[79:64] <- SRC2[31:16] + SRC2[15:0]
DEST[95:80] <- SRC2[63:48] + SRC2[47:32]
DEST[111:96] <- SRC2[95:80] + SRC2[79:64]
DEST[127:112] <- SRC2[127:112] + SRC2[111:96]
DEST[VLMAX-1:128] <- 0
VPHADDW (VEX.256 encoded version)
DEST[15:0] <- SRC1[31:16] + SRC1[15:0]
DEST[31:16] <- SRC1[63:48] + SRC1[47:32]
DEST[47:32] <- SRC1[95:80] + SRC1[79:64]
DEST[63:48] <- SRC1[127:112] + SRC1[111:96]
DEST[79:64] <- SRC2[31:16] + SRC2[15:0]
DEST[95:80] <- SRC2[63:48] + SRC2[47:32]
DEST[111:96] <- SRC2[95:80] + SRC2[79:64]
DEST[127:112] <- SRC2[127:112] + SRC2[111:96]
DEST[143:128] <- SRC1[159:144] + SRC1[143:128]
DEST[159:144] <- SRC1[191:176] + SRC1[175:160]
DEST[175:160] <- SRC1[223:208] + SRC1[207:192]
DEST[191:176] <- SRC1[255:240] + SRC1[239:224]
DEST[207:192] <- SRC2[127:112] + SRC2[143:128]
DEST[223:208] <- SRC2[159:144] + SRC2[175:160]
DEST[239:224] <- SRC2[191:176] + SRC2[207:192]
DEST[255:240] <- SRC2[223:208] + SRC2[239:224]
PHADDD (with 64-bit operands)
mm1[31-0] = mm1[63-32] + mm1[31-0];
mm1[63-32] = mm2/m64[63-32] + mm2/m64[31-0];
PHADDD (with 128-bit operands)
xmm1[31-0] = xmm1[63-32] + xmm1[31-0];
xmm1[63-32] = xmm1[127-96] + xmm1[95-64];
xmm1[95-64] = xmm2/m128[63-32] + xmm2/m128[31-0];
xmm1[127-96] = xmm2/m128[127-96] + xmm2/m128[95-64];
VPHADDD (VEX.128 encoded version)
DEST[31-0] <- SRC1[63-32] + SRC1[31-0]
DEST[63-32] <- SRC1[127-96] + SRC1[95-64]
DEST[95-64] <- SRC2[63-32] + SRC2[31-0]
DEST[127-96] <- SRC2[127-96] + SRC2[95-64]
DEST[VLMAX-1:128] <- 0
VPHADDD (VEX.256 encoded version)
DEST[31-0] <- SRC1[63-32] + SRC1[31-0]
DEST[63-32] <- SRC1[127-96] + SRC1[95-64]
DEST[95-64] <- SRC2[63-32] + SRC2[31-0]
DEST[127-96] <- SRC2[127-96] + SRC2[95-64]
DEST[159-128] <- SRC1[191-160] + SRC1[159-128]
DEST[191-160] <- SRC1[255-224] + SRC1[223-192]
DEST[223-192] <- SRC2[191-160] + SRC2[159-128]
DEST[255-224] <- SRC2[255-224] + SRC2[223-192]
Intel C/C++ Compiler Intrinsic Equivalents
PHADDW : __m64 _mm_hadd_pi16(__m64 a, __m64 b) PHADDD : __m64 _mm_hadd_pi32(__m64 a, __m64 b)(V) PHADDW : __m128i _mm_hadd_epi16(__m128i a, __m128i b)(V) PHADDD : __m128i _mm_hadd_epi32(__m128i a, __m128i b) VPHADDW : __m256i _mm256_hadd_epi16(__m256i a, __m256i b) VPHADDD : __m256i _mm256_hadd_epi32(__m256i a, __m256i b)
SIMD Floating-Point Exceptions
None.
Other Exceptions
See Exceptions Type 4; additionally
#UD If VEX.L = 1.

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