# ORPD — Bitwise Logical OR of Packed Double Precision Floating-Point Values

Opcode/Instruction | Op / En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
66 0F 56/r ORPD xmm1, xmm2/m128 | A | V/V | SSE2 | Return the bitwise logical OR of packed double precision floating-point values in xmm1 and xmm2/mem.
VEX.128.66.0F 56 /r VORPD xmm1,xmm2, xmm3/m128 | B | V/V | AVX | Return the bitwise logical OR of packed double precision floating-point values in xmm2 and xmm3/mem.
VEX.256.66.0F 56 /r VORPD ymm1, ymm2, ymm3/m256 | B | V/V | AVX | Return the bitwise logical OR of packed double precision floating-point values in ymm2 and ymm3/mem.
EVEX.128.66.0F.W1 56 /r VORPD xmm1 {k1}{z}, xmm2, xmm3/m128/m64bcst | C | V/V | AVX512VL AVX512DQ | Return the bitwise logical OR of packed double precision floating-point values in xmm2 and xmm3/m128/m64bcst subject to writemask k1.
EVEX.256.66.0F.W1 56 /r VORPD ymm1 {k1}{z}, ymm2, ymm3/m256/m64bcst | C | V/V | AVX512VL AVX512DQ | Return the bitwise logical OR of packed double precision floating-point values in ymm2 and ymm3/m256/m64bcst subject to writemask k1.
EVEX.512.66.0F.W1 56 /r VORPD zmm1 {k1}{z}, zmm2, zmm3/m512/m64bcst | C | V/V | AVX512DQ | Return the bitwise logical OR of packed double precision floating-point values in zmm2 and zmm3/m512/m64bcst subject to writemask k1.

## Instruction Operand Encoding ¶

Op/En | Tuple Type | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
A | N/A | ModRM:reg (r, w) | ModRM:r/m (r) | N/A | N/A
B | N/A | ModRM:reg (w) | VEX.vvvv (r) | ModRM:r/m (r) | N/A
C | Full | ModRM:reg (w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A

## Description ¶

Performs a bitwise logical OR of the two, four or eight packed double precision floating-point values from the first source operand and the second source operand, and stores the result in the destination operand.

EVEX encoded versions: The first source 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 is a ZMM/YMM/XMM register conditionally updated with write-mask k1.

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. The upper bits (MAXVL-1:256) of the corresponding ZMM register destination are zeroed.

VEX.128 encoded version: The first source operand is an XMM register. The second source operand is an XMM register or 128-bit memory location. The destination operand is an XMM register. The upper bits (MAXVL-1:128) of the corresponding ZMM register destination are zeroed.

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The destination is not distinct from the first source XMM register and the upper bits (MAXVL-1:128) of the corresponding register destination are unmodified.

## Operation ¶

### VORPD (EVEX Encoded Versions) ¶

    (KL, VL) = (2, 128), (4, 256), (8, 512)
    FOR j := 0 TO KL-1
        i := j * 64
        IF k1[j] OR *no writemask*
            THEN
                IF (EVEX.b == 1) AND (SRC2 *is memory*)
                    THEN
                        DEST[i+63:i] := SRC1[i+63:i] BITWISE OR SRC2[63:0]
                    ELSE
                        DEST[i+63:i] := SRC1[i+63:i] BITWISE OR SRC2[i+63:i]
                FI;
            ELSE
                IF *merging-masking* ; merging-masking
                    THEN *DEST[i+63:i] remains unchanged*
                    ELSE *zeroing-masking*
                            ; zeroing-masking
                        DEST[i+63:i] := 0
                FI
        FI;
    ENDFOR
    DEST[MAXVL-1:VL] := 0

### VORPD (VEX.256 Encoded Version) ¶

    DEST[63:0] := SRC1[63:0] BITWISE OR SRC2[63:0]
    DEST[127:64] := SRC1[127:64] BITWISE OR SRC2[127:64]
    DEST[191:128] := SRC1[191:128] BITWISE OR SRC2[191:128]
    DEST[255:192] := SRC1[255:192] BITWISE OR SRC2[255:192]
    DEST[MAXVL-1:256] := 0

### VORPD (VEX.128 Encoded Version) ¶

    DEST[63:0] := SRC1[63:0] BITWISE OR SRC2[63:0]
    DEST[127:64] := SRC1[127:64] BITWISE OR SRC2[127:64]
    DEST[MAXVL-1:128] := 0

### ORPD (128-bit Legacy SSE Version) ¶

    DEST[63:0] := DEST[63:0] BITWISE OR SRC[63:0]
    DEST[127:64] := DEST[127:64] BITWISE OR SRC[127:64]
    DEST[MAXVL-1:128] (Unmodified)

## Intel C/C++ Compiler Intrinsic Equivalent ¶

    VORPD __m512d _mm512_or_pd ( __m512d a, __m512d b);

    VORPD __m512d _mm512_mask_or_pd ( __m512d s, __mmask8 k, __m512d a, __m512d b);

    VORPD __m512d _mm512_maskz_or_pd (__mmask8 k, __m512d a, __m512d b);

    VORPD __m256d _mm256_mask_or_pd (__m256d s, ___mmask8 k, __m256d a, __m256d b);

    VORPD __m256d _mm256_maskz_or_pd (__mmask8 k, __m256d a, __m256d b);

    VORPD __m128d _mm_mask_or_pd ( __m128d s, __mmask8 k, __m128d a, __m128d b);

    VORPD __m128d _mm_maskz_or_pd (__mmask8 k, __m128d a, __m128d b);

    VORPD __m256d _mm256_or_pd (__m256d a, __m256d b);

    ORPD __m128d _mm_or_pd (__m128d a, __m128d b);

## SIMD Floating-Point Exceptions ¶

None.

## Other Exceptions ¶

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

EVEX-encoded instruction, see Table 2-49, “Type E4 Class Exception Conditions.”