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* Large System Extensions (LSE) | * Large System Extensions (LSE) | ||
** New atomic instructions to support scalable performance: | ** New atomic instructions to support scalable performance: | ||
− | + | ** Most of the following have optional load-acquire and/or store-release semantics | |
− | ** Most of the following have optional load-acquire and/or store-release semantics | ||
*** Compare and Swap: CAS, CASP (up to 128-bit values). | *** Compare and Swap: CAS, CASP (up to 128-bit values). | ||
*** Atomic Memory Operations: ADD, CLR, EOR, SET, MAX (signed/unsigned), MIN (signed/unsigned). | *** Atomic Memory Operations: ADD, CLR, EOR, SET, MAX (signed/unsigned), MIN (signed/unsigned). | ||
**** LD<op> versions return the value of the updated memory (LDADD for example). | **** LD<op> versions return the value of the updated memory (LDADD for example). | ||
**** ST<op> versions are "fire-and-forget" (STADD for example). | **** ST<op> versions are "fire-and-forget" (STADD for example). | ||
− | *** | + | **** Instructions for full-word, half-word, and byte operations are available. |
* Rounding Double Multiply Add/Subtract instruction (RDMA) | * Rounding Double Multiply Add/Subtract instruction (RDMA) | ||
* Limited Ordering Regions (LOR) | * Limited Ordering Regions (LOR) |