c.fldsp
Load doubleword into floating-point register from stack
This instruction is defined by:
Synopsis
Loads a double-precision floating-point value from memory into floating-point register rd.
It computes its effective address by adding the zero-extended offset, scaled by 8,
to the stack pointer, x2.
It expands to fld rd, offset(x2).
Decode Variables
Bits<9> imm = {$encoding[4:2], $encoding[12], $encoding[6:5], 3'd0};
Bits<5> rd = $encoding[11:7];Execution
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Pruned, XLEN == 64
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Original
if ((%%LINK%csr_field;misa.C;CSR[misa].C%% == 1'b0)) {
%%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
if ((%%LINK%csr_field;misa.D;CSR[misa].D%% == 1'b0)) {
%%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg virtual_address = X[2] + imm;
f[rd] = %%LINK%func;read_memory;read_memory%%<64>(virtual_address, $encoding);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);
}
if (%%LINK%func;implemented?;implemented?%%(ExtensionName::D) && (%%LINK%csr_field;misa.D;CSR[misa].D%% == 1'b0)) {
%%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg virtual_address = X[2] + imm;
f[rd] = %%LINK%func;read_memory;read_memory%%<64>(virtual_address, $encoding);