c.fldsp

Load doubleword into floating-point register from stack

This instruction is defined by:

Encoding

Synopsis

Loads a double-precision floating-point value from memory into floating-point register fd. It computes its effective address by adding the zero-extended offset, scaled by 8, to the stack pointer, x2. It expands to fld fd, offset(x2).

Access

Always

Decode Variables

Bits<9> imm = {$encoding[4:2], $encoding[12], $encoding[6:5], 3'd0};
Bits<5> fd = $encoding[11:7];

Execution

Pruned, XLEN == 64
Original

if ((misa.C == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
if ((misa.D == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg virtual_address = X[2] + imm;
f[fd] = read_memory<64>(virtual_address, $encoding);

if (implemented?(ExtensionName::C) && (misa.C == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
if (implemented?(ExtensionName::D) && (misa.D == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg virtual_address = X[2] + imm;
f[fd] = read_memory<64>(virtual_address, $encoding);

Exceptions

This instruction may result in the following synchronous exceptions:

IllegalInstruction
LoadAccessFault
LoadPageFault