sd
Store doubleword
This instruction is defined by:
-
I, version >= I@2.1.0
This instruction is included in the following profiles:
-
MockProfile 64-bit S-mode (Mandatory)
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MockProfile 64-bit Unpriv (Mandatory)
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RVA20S64 (Mandatory)
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RVA20U64 (Mandatory)
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RVA22S64 (Mandatory)
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RVA22U64 (Mandatory)
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RVA23S64 (Mandatory)
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RVA23U64 (Mandatory)
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RVB23S64 (Mandatory)
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RVB23U64 (Mandatory)
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RVI20U32 (Mandatory)
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RVI20U64 (Mandatory)
Synopsis
Store 64 bits of data from register xs2 to an
address formed by adding xs1 to a signed offset.
Decode Variables
signed Bits<12> imm = sext({$encoding[31:25], $encoding[11:7]});
Bits<5> xs1 = $encoding[19:15];
Bits<5> xs2 = $encoding[24:20];Execution
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IDL
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Sail
XReg virtual_address = X[xs1] + $signed(imm);
write_memory<64>(virtual_address, X[xs2], $encoding);{
let offset : xlenbits = sign_extend(imm);
/* Get the address, X(xs1) + offset.
Some extensions perform additional checks on address validity. */
match ext_data_get_addr(xs1, offset, Write(Data), width) {
Ext_DataAddr_Error(e) => { ext_handle_data_check_error(e); RETIRE_FAIL },
Ext_DataAddr_OK(vaddr) =>
if check_misaligned(vaddr, width)
then { handle_mem_exception(vaddr, E_SAMO_Addr_Align()); RETIRE_FAIL }
else match translateAddr(vaddr, Write(Data)) {
TR_Failure(e, _) => { handle_mem_exception(vaddr, e); RETIRE_FAIL },
TR_Address(paddr, _) => {
let eares : MemoryOpResult(unit) = match width {
BYTE => mem_write_ea(paddr, 1, aq, rl, false),
HALF => mem_write_ea(paddr, 2, aq, rl, false),
WORD => mem_write_ea(paddr, 4, aq, rl, false),
DOUBLE => mem_write_ea(paddr, 8, aq, rl, false)
};
match (eares) {
MemException(e) => { handle_mem_exception(vaddr, e); RETIRE_FAIL },
MemValue(_) => {
let xs2_val = X(xs2);
let res : MemoryOpResult(bool) = match (width) {
BYTE => mem_write_value(paddr, 1, xs2_val[7..0], aq, rl, false),
HALF => mem_write_value(paddr, 2, xs2_val[15..0], aq, rl, false),
WORD => mem_write_value(paddr, 4, xs2_val[31..0], aq, rl, false),
DOUBLE if sizeof(xlen) >= 64
=> mem_write_value(paddr, 8, xs2_val, aq, rl, false),
_ => report_invalid_width(__FILE__, __LINE__, width, "store"),
};
match (res) {
MemValue(true) => RETIRE_SUCCESS,
MemValue(false) => internal_error(__FILE__, __LINE__, "store got false from mem_write_value"),
MemException(e) => { handle_mem_exception(vaddr, e); RETIRE_FAIL }
}
}
}
}
}
}
}