STSMIN, STSMINL
Atomic signed minimum on word or doubleword in memory, without return, atomically loads a 32-bit word or 64-bit doubleword from memory, compares it against the value held in a register, and stores the smaller value back to memory, treating the values as signed numbers.
- STSMIN does not have release semantics.
- STSMINL stores to memory with release semantics, as described in Load-Acquire, Store-Release.
For information about memory accesses see Load/Store addressing modes.
This is an alias of LDSMIN, LDSMINA, LDSMINAL, LDSMINL. This means:
- The encodings in this description are named to match the encodings of LDSMIN, LDSMINA, LDSMINAL, LDSMINL.
- The description of LDSMIN, LDSMINA, LDSMINAL, LDSMINL gives the operational pseudocode for this instruction.
Integer
(Armv8.1)
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | x | 1 | 1 | 1 | 0 | 0 | 0 | 0 | R | 1 | Rs | 0 | 1 | 0 | 1 | 0 | 0 | Rn | 1 | 1 | 1 | 1 | 1 | ||||||||
| size | A | opc | Rt | ||||||||||||||||||||||||||||
32-bit LDSMIN alias (size == 10 && R == 0)
is equivalent to
and is always the preferred disassembly.
32-bit LDSMINL alias (size == 10 && R == 1)
is equivalent to
and is always the preferred disassembly.
64-bit LDSMIN alias (size == 11 && R == 0)
is equivalent to
and is always the preferred disassembly.
64-bit LDSMINL alias (size == 11 && R == 1)
is equivalent to
and is always the preferred disassembly.
Assembler Symbols
| <Ws> |
Is the 32-bit name of the general-purpose register holding the data value to be operated on with the contents of the memory location, encoded in the "Rs" field. |
| <Xs> |
Is the 64-bit name of the general-purpose register holding the data value to be operated on with the contents of the memory location, encoded in the "Rs" field. |
| <Xn|SP> |
Is the 64-bit name of the general-purpose base register or stack pointer, encoded in the "Rn" field. |
Operation
The description of LDSMIN, LDSMINA, LDSMINAL, LDSMINL gives the operational pseudocode for this instruction.
Operational information
If PSTATE.DIT is 1, the timing of this instruction is insensitive to the value of the data being loaded or stored.