flw
Floating-Point Load Single-Precision
This instruction is defined by:
Synopsis
The flw instruction loads a single-precision floating-point value from memory at address xs1 + imm into floating-point register fd.
It does not modify the bits being transferred; in particular, the payloads of non-canonical NaNs are preserved.
Decode Variables
Bits<12> imm = $encoding[31:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> fd = $encoding[11:7];Execution
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Pruned, XLEN == 64
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Original
check_f_ok($encoding);
XReg virtual_address = X[xs1] + $signed(imm);
Bits<32> sp_value = read_memory<32>(virtual_address, $encoding);
if (implemented?(ExtensionName::D)) {
f[fd] = nan_box<32, 64>(sp_value);
} else {
f[fd] = sp_value;
}
mark_f_state_dirty();check_f_ok($encoding);
XReg virtual_address = X[xs1] + $signed(imm);
Bits<32> sp_value = read_memory<32>(virtual_address, $encoding);
if (implemented?(ExtensionName::D)) {
f[fd] = nan_box<32, 64>(sp_value);
} else {
f[fd] = sp_value;
}
mark_f_state_dirty();