amoswap.w
Atomic SWAP word
This instruction is defined by:
Synopsis
Atomically:
-
Load the word at address xs1
-
Write the sign-extended value into xd
-
Store the least-significant word of register xs2 to the address in xs1
Decode Variables
Bits<5> xs2 = $encoding[24:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> xd = $encoding[11:7];Execution
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Pruned, XLEN == 64
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Original
XReg virtual_address = X[xs1];
X[xd] = amo(32, virtual_address, X[xs2][31:0], AmoOperation::Swap, 1'b0, 1'b0, $encoding);if (implemented?(ExtensionName::A) && MISA_CSR_IMPLEMENTED && CSR[misa].A == 1'b0) {
reserved_instruction($encoding);
}
XReg virtual_address = X[xs1];
X[xd] = amo(32, virtual_address, X[xs2][31:0], AmoOperation::Swap, 1'b0, 1'b0, $encoding);