c.lw
Load word
This instruction is defined by:
Synopsis
Loads a 32-bit value from memory into register xd.
It computes an effective address by adding the zero-extended offset, scaled by 4,
to the base address in register xs1.
It expands to lw xd, offset(xs1).
Decode Variables
Bits<7> imm = {$encoding[5], $encoding[12:10], $encoding[6], 2'd0};
Bits<3> xd = $encoding[4:2];
Bits<3> xs1 = $encoding[9:7];Execution
-
Pruned, XLEN == 64
-
Original
if ((%%LINK%csr_field;misa.C;CSR[misa].C%% == 1'b0)) {
%%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg virtual_address = X[%%LINK%func;creg2reg;creg2reg%%(xs1)] + imm;
X[%%LINK%func;creg2reg;creg2reg%%(xd)] = %%LINK%func;sext;sext%%(%%LINK%func;read_memory;read_memory%%<32>(virtual_address, $encoding), 32);if (%%LINK%func;implemented?;implemented?%%(ExtensionName::C) && (%%LINK%csr_field;misa.C;CSR[misa].C%% == 1'b0)) {
%%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg virtual_address = X[%%LINK%func;creg2reg;creg2reg%%(xs1)] + imm;
X[%%LINK%func;creg2reg;creg2reg%%(xd)] = %%LINK%func;sext;sext%%(%%LINK%func;read_memory;read_memory%%<32>(virtual_address, $encoding), 32);