ANDN (Intel x86/64 assembly instruction)

모두의 코드
ANDN (Intel x86/64 assembly instruction)

작성일 : 2020-09-01 이 글은 802 번 읽혔습니다.

ANDN

Logical AND NOT

참고 사항

아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.

Opcode/Instruction	Op/ En	64/32 -bit Mode	CPUID Feature Flag	Description
`VEX.NDS.LZ.0F38.W0 F2 /r` ANDN r32a r32b r/m32	RVM	V/V	BMI1	Bitwise AND of inverted r32b with r/m32, store result in r32a.
`VEX.NDS.LZ. 0F38.W1 F2 /r` ANDN r64a r64b r/m64	RVM	V/NE	BMI1	Bitwise AND of inverted r64b with r/m64, store result in r64a.

Instruction Operand Encoding

Op/En	Operand 1	Operand 2	Operand 3	Operand 4
RVM	ModRM:reg (w)	VEX.vvvv (r)	ModRM:r/m (r)	NA

Description

Performs a bitwise logical AND of inverted second operand (the first source operand) with the third operand (the

second source operand). The result is stored in the first operand (destination operand).

This instruction is not supported in real mode and virtual-8086 mode. The operand size is always 32 bits if not in 64-bit mode. In 64-bit mode operand size 64 requires VEX.W1. VEX.W1 is ignored in non-64-bit modes. An attempt to execute this instruction with VEX.L not equal to 0 will cause #UD.

Operation

DEST <- (NOT SRC1) bitwiseAND SRC2;
SF <- DEST[OperandSize -1];
ZF <- (DEST = 0);

Flags Affected

SF and ZF are updated based on result. OF and CF flags are cleared. AF and PF flags are undefined.

Intel C/C++ Compiler Intrinsic Equivalent

Auto - generated from high - level language.

SIMD Floating-Point Exceptions

None

Other Exceptions

See Section 2.5.1, "Exception Conditions for VEX-Encoded GPR Instructions", Table 2-29; additionally

#UD If VEX.W = 1.

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모두의 코드 ANDN (Intel x86/64 assembly instruction)