fsgnjn.s
Floating-Point Sign-Inject Negate Single-Precision
The fsgnjn.s instruction produces a result that takes all bits except the sign bit from fs1.
The result’s sign bit is opposite of fs2’s sign bit, and the result is written to the destination
register `fd. Sign-injection instructions do not set floating-point exception flags, nor do they
canonicalize NaNs.
Decode Variables
Bits<5> fs2 = $encoding[24:20];
Bits<5> fs1 = $encoding[19:15];
Bits<5> fd = $encoding[11:7];Execution
check_f_ok($encoding);
Bits<32> sp_value = {~F[fs2][31], F[fs1][30:0]};
if (implemented?(ExtensionName::D)) {
F[fd] = nan_box(32, 64, sp_value);
} else {
F[fd] = sp_value;
}
mark_f_state_dirty();