# `bvc`

[M68K Documentation](https://asm-editor.specy.app/documentation/m68k.md) › [Instructions](https://asm-editor.specy.app/documentation/m68k/instruction.md)

Web page: https://asm-editor.specy.app/documentation/m68k/instruction/bvc

**Branch if overflow clear**

Category: Control flow

Branches to the specified address if overflow clear.

Sizes .b .s .w .l

## Flags

| Flag | Effect |
| --- | --- |
| X | not changed |
| N | not changed |
| Z | not changed |
| V | not changed |
| C | not changed |

Reads: V

## Forms

- `bvc label`

## Operands

- [`label`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/effective-address.md): A branch target, written as a label or address. The assembler calculates the relative displacement.

## Description

The suffix selects the condition. See [condition codes](https://asm-editor.specy.app/documentation/m68k/condition-codes.md). The size sets the branch’s reach: about 128 bytes in either direction for `.s` (or `.b`), and 32 KB for `.w`. With no size, the assembler chooses `.s` for a known target when the short encoding can reach it. On the 68020, it chooses `.l` for a known target beyond `.w` reach. All other cases use `.w`, including forward references. On the 68020, `.l` reaches anywhere in memory. See [long branches](https://asm-editor.specy.app/documentation/m68k/addressing-mode/long-branches.md). On the 68000 and 68010, `.l` is treated as `.w`, as in EASy68K.

## Example

```m68k
* --- Loop: count down from 10 ---
move.l #10, d0
move.l #0, d1
loop:
    addq.l #1, d1
    subq.l #1, d0
    bne loop ; branch if d0 != 0

* --- Conditional skip ---
move.l #5, d2
move.l #5, d3
cmp.l d3, d2
beq are_equal ; branch if d2 == d3
move.l #0, d4
bra done
are_equal:
    move.l #$FF, d4
done:
```