c.swsp
Store word to stack
This instruction is defined by:
-
anyOf:
-
C, version >= 0
-
Zca, version >= 0
-
This instruction is included in the following profiles:
Synopsis
Stores a 32-bit value in register rs2 to memory.
It computes an effective address by adding the zero-extended offset, scaled by 4,
to the stack pointer, x2.
It expands to sw rs2, offset(x2).
Decode Variables
Bits<8> imm = {$encoding[8:7], $encoding[12:9], 2'd0};
Bits<5> rs2 = $encoding[6:2];Execution
-
IDL
if (implemented?(ExtensionName::C) && (CSR[misa].C == 1'b0)) {
raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg virtual_address = X[2] + imm;
write_memory<32>(virtual_address, X[rs2][31:0], $encoding);