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ATOMIC_SUB(3clc) OpenCL Manual ATOMIC_SUB(3clc)


atomic_sub - atomic_sub functions.

int atomic_sub(volatile global(3clc) int *p, int val);

unsigned int atomic_sub(volatile global(3clc) unsigned int *p, unsigned int val);

int atomic_sub(volatile local(3clc) int *p, int val);

unsigned int atomic_sub(volatile local(3clc) unsigned int *p, unsigned int val);


Read the 32-bit value (referred to as old) stored at location pointed by p. Compute (old - val) and store result at location pointed by p. The function returns old.

A 64-bit version of this function, atom_sub(3clc), is enabled by cl_khr_int64_base_atomics(3clc).


OpenCL Specification[1]


atomicFunctions(3clc), atom_sub(3clc)


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OpenCL Specification
page 279, section 6.12.11 - Atomic Functions for 32-bit integers
01/14/2021 The Khronos Group