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Correct fcvtmod.w.d flag generation logic for exp == 31 #442

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merged 2 commits into from
Apr 29, 2024
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Correct fcvtmod.w.d flag generation logic for exp == 31 #442

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824e357
Correct fcvtmod.w.d flag generation logic
jordancarlin Mar 25, 2024
2921faf
split fcvtmod.w.d invalid check into 2 if statements
jordancarlin Mar 26, 2024
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5 changes: 4 additions & 1 deletion model/riscv_insts_zfa.sail
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Original file line number Diff line number Diff line change
Expand Up @@ -745,7 +745,10 @@ function fcvtmod_helper(x64) = {
else integer;

/* Raise FP exception flags, honoring the precedence of nV > nX */
let flags : bits(5) = if (true_exp > 31) then nvFlag()
let max_integer = if sign == 0b1 then unsigned(0x80000000)
else unsigned(0x7fffffff);
let flags : bits(5) = if true_exp > 31 then nvFlag()
else if unsigned(integer) > max_integer then nvFlag()
else if (fractional != zeros()) then nxFlag()
else zeros();

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