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Fixed corner-case in fp.rem encoding. Fixes #2289.

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This commit is contained in:
Christoph M. Wintersteiger 2019-06-07 18:03:38 +01:00
parent f065a6b13b
commit 998b0ff7f4
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GPG key ID: BCF6360F86294467
1 changed files with 6 additions and 6 deletions
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12
src/ast/fpa/fpa2bv_converter.cpp
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@ -1153,7 +1153,7 @@ void fpa2bv_converter::mk_rem(sort * s, expr_ref & x, expr_ref & y, expr_ref & r
expr_ref y_half(m), ny_half(m), zero_e(m), two_e(m);
expr_ref y_half_is_zero(m), y_half_is_nz(m);
expr_ref r_ge_y_half(m), r_gt_ny_half(m), r_le_y_half(m), r_lt_ny_half(m);
expr_ref r_gt_y_half(m), r_gt_ny_half(m), r_lt_y_half(m), r_lt_ny_half(m);
expr_ref r_ge_zero(m), r_le_zero(m);
expr_ref rounded_sub_y(m), rounded_add_y(m);
mpf zero, two;
@ -1166,9 +1166,9 @@ void fpa2bv_converter::mk_rem(sort * s, expr_ref & x, expr_ref & y, expr_ref & r
mk_is_zero(y_half, y_half_is_zero);
y_half_is_nz = m.mk_not(y_half_is_zero);
mk_float_ge(s, rndd, y_half, r_ge_y_half);
mk_float_gt(s, rndd, y_half, r_gt_y_half);
mk_float_gt(s, rndd, ny_half, r_gt_ny_half);
mk_float_le(s, rndd, y_half, r_le_y_half);
mk_float_lt(s, rndd, y_half, r_lt_y_half);
mk_float_lt(s, rndd, ny_half, r_lt_ny_half);
mk_sub(s, rne_bv, rndd, y, rounded_sub_y);
@ -1176,11 +1176,11 @@ void fpa2bv_converter::mk_rem(sort * s, expr_ref & x, expr_ref & y, expr_ref & r
expr_ref sub_cnd(m), add_cnd(m);
sub_cnd = m.mk_and(y_half_is_nz,
m.mk_or(m.mk_and(y_is_pos, r_ge_y_half),
m.mk_and(y_is_neg, r_le_y_half)));
m.mk_or(m.mk_and(y_is_pos, r_gt_y_half),
m.mk_and(y_is_neg, r_lt_y_half)));
add_cnd = m.mk_and(y_half_is_nz,
m.mk_or(m.mk_and(y_is_pos, r_lt_ny_half),
m.mk_and(y_is_neg, r_gt_ny_half)));
m.mk_and(y_is_neg, r_gt_ny_half)));
mk_ite(add_cnd, rounded_add_y, rndd, v7);
mk_ite(sub_cnd, rounded_sub_y, v7, v7);