diff options
Diffstat (limited to 'llvm/docs/LangRef.rst')
| -rw-r--r-- | llvm/docs/LangRef.rst | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst index 496a0f7eaaf..b28f2e6f8f6 100644 --- a/llvm/docs/LangRef.rst +++ b/llvm/docs/LangRef.rst @@ -8584,13 +8584,14 @@ operation. The operation must be one of the following keywords: - umax - umin -The type of '<value>' must be an integer type whose bit width is a power -of two greater than or equal to eight and less than or equal to a -target-specific size limit. The type of the '``<pointer>``' operand must -be a pointer to that type. If the ``atomicrmw`` is marked as -``volatile``, then the optimizer is not allowed to modify the number or -order of execution of this ``atomicrmw`` with other :ref:`volatile -operations <volatile>`. +For most of these operations, the type of '<value>' must be an integer +type whose bit width is a power of two greater than or equal to eight +and less than or equal to a target-specific size limit. For xchg, this +may also be a floating point type with the same size constraints as +integers. The type of the '``<pointer>``' operand must be a pointer to +that type. If the ``atomicrmw`` is marked as ``volatile``, then the +optimizer is not allowed to modify the number or order of execution of +this ``atomicrmw`` with other :ref:`volatile operations <volatile>`. A ``atomicrmw`` instruction can also take an optional ":ref:`syncscope <syncscope>`" argument. |
