Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

Vol. 2B 4-51
INSTRUCTION SET REFERENCE, N-Z
PAND—Logical AND
Description
Performs a bitwise logical AND operation on the source operand (second operand)
and the destination operand (first operand) and stores the result in the destination
operand. The source operand can be an MMX technology register or a 64-bit memory
location or it can be an XMM register or a 128-bit memory location. The destination
operand can be an MMX technology register or an XMM register. Each bit of the result
is set to 1 if the corresponding bits of the first and second operands are 1; otherwise,
it is set to 0.
In 64-bit mode, using a REX prefix in the form of REX.R permits this instruction to
access additional registers (XMM8-XMM15).
Operation
DEST ← (DEST AND SRC);
Intel C/C++ Compiler Intrinsic Equivalent
PAND __m64 _mm_and_si64 (__m64 m1, __m64 m2)
PAND __m128i _mm_and_si128 ( __m128i a, __m128i b)
Flags Affected
None.
Numeric Exceptions
None.
Protected Mode Exceptions
#GP(0) If a memory operand effective address is outside the CS, DS,
ES, FS, or GS segment limit.
(128-bit operations only) If a memory operand is not aligned on
a 16-byte boundary, regardless of segment.
Opcode Instruction
64-
Bit
Mode
Compat/
Leg Mode Description
0F DB /r PAND mm, mm/m64 Valid Valid Bitwise AND mm/m64 and
mm.
66 0F DB /r PAND xmm1,
xmm2/m128
Valid Valid Bitwise AND of
xmm2/m128 and xmm1.