c.sdsp
Store doubleword to stack
This instruction is defined by:
Synopsis
Stores a 64-bit value in register rs2 to memory.
It computes an effective address by adding the zero-extended offset, scaled by 8,
to the stack pointer, x2.
It expands to sd xs2, offset(x2).
Decode Variables
Bits<5> xs2 = $encoding[6:2];
Bits<9> imm = {$encoding[9:7], $encoding[12:10], 3'd0};Execution
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Pruned, XLEN == 64
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Original
if (implemented?(ExtensionName::C) && (misa.C == 1'b0)) {
raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg virtual_address = X[2] + imm;
write_memory<64>(virtual_address, X[creg2reg(xs2)], $encoding);if (implemented?(ExtensionName::C) && (misa.C == 1'b0)) {
raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg virtual_address = X[2] + imm;
if (xlen() == 32) {
if (implemented?(ExtensionName::Zclsd)) {
Bits<64> data = {X[creg2reg(xs2) + 1], X[creg2reg(xs2)]};
write_memory<64>(virtual_address, data, $encoding);
} else {
raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
} else {
write_memory<64>(virtual_address, X[creg2reg(xs2)], $encoding);
}