ORPD (Bitwise Logical OR of Double-Precision Floating-Point Values)

Opcodes

Opcode/Instruction Op/En 64/32 bit Mode Support CPUID Feature Flag Description
66 0F 56 /r ORPD xmm1, xmm2/m128 RM V/V SSE2 Bitwise OR of xmm2/m128 and xmm1.
VEX.NDS.128.66.0F.WIG 56 /r VORPD xmm1,xmm2, xmm3/m128 RVM V/V AVX Return the bitwise logical OR of packed double-precision floating-point values in xmm2 and xmm3/mem.
VEX.NDS.256.66.0F.WIG 56 /r VORPD ymm1, ymm2, ymm3/m256 RVM V/V AVX Return the bitwise logical OR of packed double-precision floating-point values in ymm2 and ymm3/mem.

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

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

In 64-bit mode, using a REX prefix in the form of REX.R permits this instruction to access additional registers (XMM8-XMM15).

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

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

VEX.256 encoded version: The first source operand is a YMM register. The second source operand can be a YMM register or a 256-bit memory location. The destination operand is a YMM register.

Note: If VORPD is encoded with VEX.L= 1, an attempt to execute the instruction encoded with VEX.L= 1 will cause an #UD exception.

Operation

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[VLMAX-1:128] (Unmodified)

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[VLMAX-1:128] ← 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]

Intel

C/C++ Compiler Intrinsic Equivalent

® ORPD:

__m128d _mm_or_pd(__m128d a, __m128d b);

VORPD:

__m256d _mm256_or_pd (__m256d a, __m256d b);

SIMD Floating-Point Exceptions

None.

Other Exceptions

See Exceptions Type 4; additionally

#UD If VEX.L = 1.