For the maritime flag, see International Code of Signals.
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The zero flag is a single bit flag that is a central feature on most conventional CPU architectures (including x86, ARM, PDP-11, 68000, 6502, and numerous others). It is often stored in a dedicated register, typically called status register or flag register, along with other flags. The zero flag is typically abbreviated Z or ZF or similar in most documentation and assembly languages.
Along with a carry flag, a sign flag and an overflow flag, the zero flag is used to check the result of an arithmetic operation, including bitwise logical instructions. It is set to 1, or true, if an arithmetic result is zero, and reset otherwise. This includes results which are not stored, as most traditional instruction sets implement the compare instruction as a subtract where the result is discarded. It is also common that processors have a bitwise AND-instruction that does not store the result.
The logical formula of the zero flag for a twos-complement binary operand is NOT(OR(all bits of the operand in question)).
In most processors, the zero flag is mainly used in conditional branch instructions, which alter control flow on previous instruction results, but there are often other uses as well.
In some instruction sets such as the MIPS architecture, a dedicated flag register is not used; jump instructions instead check a register for zero.
The zeroflag is a single bit flag that is a central feature on most conventional CPU architectures (including x86, ARM, PDP-11, 68000, 6502, and numerous...
Raising the Flag at Ground Zero is a photograph by Thomas E. Franklin of The Record newspaper of Bergen County, New Jersey, taken on September 11, 2001...
instruction in the x86 assembly language will result in a jump if the Z (zero) flag was set by some previous operation. A bit field is distinguished from...
carry (or half carry), zero and sign flags are included in many architectures (many modern (RISC) architectures do not have flags, such as carry, and even...
Division of a non-zero number by zero sets the divide by zeroflag, and an operation producing a NaN sets the invalid operation flag. An exception handler...
The national flag of the United States, often referred to as the American flag or the U.S. flag, consists of thirteen equal horizontal stripes of red (top...
the result of the operation is zero and cleared if it is nonzero. Other classes of instructions may also modify the flags to indicate status. For example...
boson. In computer programming, Z is the abbreviation for the zeroflag. In Japan, the Z flag is a symbol in the national myth, representing the Battle of...
copied to the flags register. When this happens, C0 is placed in the carry flag, C2 in the parity flag and C3 in the zeroflag. The C2 flag is set when...
EAX with itself. Among other things, this will ; set the processor's ZeroFlag if EAX is 0. ; If EAX is 0, then the lock was unlocked and ; we just locked...
five Unicode code points: U+1F3F3 🏳 WAVING WHITE FLAG, U+FE0F ️ VARIATION SELECTOR-16, U+200D ZERO WIDTH JOINER, U+26A7 ⚧ MALE WITH STROKE AND MALE AND...
equivalent operation is count trailing zeros (ctz) or number of trailing zeros (ntz), which counts the number of zero bits following the least significant...
Ground Zero Spirit, the photograph is perhaps better known as Raising the Flag at Ground Zero, and shows three firefighters raising a U.S. flag in the...
considering U+1F3F3 🏳 WAVING WHITE FLAG instead, but from eleventh onwards it is black. Some vendors choose to include custom zero-width joiner sequences that...
ZF (if the result is zero) and CF (if the source is zero) flags rather than setting the ZF (if the source is zero). For a non-zero argument, the result...
floating point stack register, depending on the contents of EFLAGS integer flag register, to the ST(0) (top of stack) register. There are 8 variants of the...
certain combinations were supported. The FLAGS register contains flags such as carry flag, overflow flag and zeroflag. Finally, the instruction pointer (IP)...
instructions affect the flags. The flags are: Sign (S), set if the result is negative. Zero (Z), set if the result is zero. Parity (P), set if the number...
Auxiliary carry flag (AF), Zeroflag (ZF), Sign flag (SF), Trap flag (TF), Interrupt flag (IF), Direction flag (DF), and Overflow flag (OF). Also referred...
subcc %L1,10,%G0 !subtract 10 from %L1, setting the zeroflag if %L1 is 10 be WASEQUAL !if the zeroflag is set, branch to the address marked WASEQUAL In...
hdl:10500/23252. Berry, Bruce B. (September 2015), "Zero to Hero" – the role of the national flag in nation building in post-apartheid South Africa, Sydney:...
double.) As the raised divide-by-zeroflag is not an error in this case, it can simply be dismissed to clear the flag for use by later code. In some cases...
also responsible for helping find the missing 9/11 flag that the firefighters raised at Ground Zero at the World Trade Center site, making national news...
International maritime signal flags are various flags used to communicate with ships. The principal system of flags and associated codes is the International...
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