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Fix conversion of signed 1-bit BV to FP

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Fixes https://github.com/AliveToolkit/alive2/issues/1193
This commit is contained in:
Nuno Lopes 2025-04-25 12:38:00 +01:00
parent 792ffeeda7
commit 322e4441b3
1 changed files with 1 additions and 1 deletions
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src/ast/fpa/fpa2bv_converter.cpp
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@ -3051,7 +3051,7 @@ void fpa2bv_converter::mk_to_fp_signed(func_decl * f, unsigned num, expr * const
expr_ref sign_bit(m), exp_too_large(m), sig_4(m), exp_2(m), rest(m);
expr_ref is_neg(m), x_abs(m), neg_x(m);
sign_bit = m_bv_util.mk_extract(bv_sz - 1, bv_sz - 1, x);
rest = m_bv_util.mk_extract(bv_sz - 2, 0, x);
rest = m_bv_util.mk_extract(bv_sz == 1 ? 0 : (bv_sz - 2), 0, x);
dbg_decouple("fpa2bv_to_fp_signed_rest", rest);
is_neg = m.mk_eq(sign_bit, bv1_1);
neg_x = m_bv_util.mk_bv_neg(x); // overflow ok, x_abs is now unsigned.