Module: ppl/ppl Branch: floating_point Commit: 41e8ca0bea15517ef175ca7b0b2fd44300497442 URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=41e8ca0bea155...
Author: Fabio Bossi bossi@cs.unipr.it Date: Thu Sep 17 10:30:57 2009 +0200
Use ROUND_UP (or, in one case where intervals are involved, ROUND_DOWN) whenever appropriate.
---
src/Octagonal_Shape.templates.hh | 39 ++++++++++++++++++------------------- 1 files changed, 19 insertions(+), 20 deletions(-)
diff --git a/src/Octagonal_Shape.templates.hh b/src/Octagonal_Shape.templates.hh index 0cd06f5..1d93abf 100644 --- a/src/Octagonal_Shape.templates.hh +++ b/src/Octagonal_Shape.templates.hh @@ -32,6 +32,7 @@ site: http://www.cs.unipr.it/ppl/ . */ #include "meta_programming.hh" #include "assert.hh" #include <vector> +#include <map> #include <deque> #include <string> #include <iostream> @@ -563,7 +564,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(b_plus_minus_a_minus, right_b.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(b_plus_minus_a_minus, b_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); add_octagonal_constraint(n_right, n_right+1, b_plus_minus_a_minus); return; } @@ -576,7 +577,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(b_plus_minus_a_minus, right_b.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(b_plus_minus_a_minus, b_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); add_octagonal_constraint(n_right+1, n_right, b_plus_minus_a_minus); return; } @@ -596,7 +597,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(a_plus_minus_b_minus, right_a.upper(), left_b.lower(), ROUND_UP); mul_2exp_assign_r(a_plus_minus_b_minus, a_plus_minus_b_minus, 1, - ROUND_IGNORE); + ROUND_UP); add_octagonal_constraint(n_left+1, n_left, a_plus_minus_b_minus); return; } @@ -609,7 +610,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(a_plus_minus_b_minus, right_a.upper(), left_b.lower(), ROUND_UP); mul_2exp_assign_r(a_plus_minus_b_minus, a_plus_minus_b_minus, 1, - ROUND_IGNORE); + ROUND_UP); add_octagonal_constraint(n_left, n_left+1, a_plus_minus_b_minus); return; } @@ -668,7 +669,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(c_plus_minus_a_minus, right_c.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(c_plus_minus_a_minus, c_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); if (left_w_id < right_w_id) add_octagonal_constraint(n_right, n_left, c_plus_minus_a_minus); else @@ -684,7 +685,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(c_plus_minus_a_minus, right_c.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(c_plus_minus_a_minus, c_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); if (left_w_id < right_w_id) add_octagonal_constraint(n_right+1, n_left, c_plus_minus_a_minus); else @@ -700,7 +701,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(c_plus_minus_a_minus, right_c.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(c_plus_minus_a_minus, c_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); if (left_w_id < right_w_id) add_octagonal_constraint(n_right, n_left+1, c_plus_minus_a_minus); else @@ -716,7 +717,7 @@ Octagonal_Shape<T>::refine_with_linear_form_inequality( sub_assign_r(c_plus_minus_a_minus, right_c.upper(), left_a.lower(), ROUND_UP); mul_2exp_assign_r(c_plus_minus_a_minus, c_plus_minus_a_minus, 1, - ROUND_IGNORE); + ROUND_UP); if (left_w_id < right_w_id) add_octagonal_constraint(n_right+1, n_left+1, c_plus_minus_a_minus); else @@ -5163,10 +5164,10 @@ Octagonal_Shape<T>::affine_image(Variable var, add_assign_r(m_i_cv, m_i_cv, b_mlb, ROUND_UP); } // Now update unary constraints on var. - mul_2exp_assign_r(b_ub, b_ub, 1, ROUND_IGNORE); + mul_2exp_assign_r(b_ub, b_ub, 1, ROUND_UP); N& m_cv_v = m_cv[n_var]; add_assign_r(m_cv_v, m_cv_v, b_ub, ROUND_UP); - mul_2exp_assign_r(b_mlb, b_mlb, 1, ROUND_IGNORE); + mul_2exp_assign_r(b_mlb, b_mlb, 1, ROUND_UP); N& m_v_cv = m_v[n_var+1]; add_assign_r(m_v_cv, m_v_cv, b_mlb, ROUND_UP); reset_strongly_closed(); @@ -5188,8 +5189,8 @@ Octagonal_Shape<T>::affine_image(Variable var, if (b != 0) { // Translate the unary constraints on `var' by adding the value // `b_ub' or subtracting the value `b_lb'. - mul_2exp_assign_r(b_ub, b_ub, 1, ROUND_IGNORE); - mul_2exp_assign_r(b_mlb, b_mlb, 1, ROUND_IGNORE); + mul_2exp_assign_r(b_ub, b_ub, 1, ROUND_UP); + mul_2exp_assign_r(b_mlb, b_mlb, 1, ROUND_UP); add_assign_r(m_cv_v, m_cv_v, b_ub, ROUND_UP); add_assign_r(m_v_cv, m_v_cv, b_mlb, ROUND_UP); } @@ -5288,9 +5289,9 @@ Octagonal_Shape<T>::affine_image(Variable var, linear_form_upper_bound(lf, lf_ub); PPL_DIRTY_TEMP(N, minus_lf_ub); linear_form_upper_bound(minus_lf, minus_lf_ub); - mul_2exp_assign_r(lf_ub, lf_ub, 1, ROUND_IGNORE); + mul_2exp_assign_r(lf_ub, lf_ub, 1, ROUND_UP); assign_r(matrix[n_var+1][n_var], lf_ub, ROUND_NOT_NEEDED); - mul_2exp_assign_r(minus_lf_ub, minus_lf_ub, 1, ROUND_IGNORE); + mul_2exp_assign_r(minus_lf_ub, minus_lf_ub, 1, ROUND_UP); assign_r(matrix[n_var][n_var+1], minus_lf_ub, ROUND_NOT_NEEDED);
PPL_ASSERT(OK()); @@ -5335,11 +5336,10 @@ linear_form_upper_bound(const Linear_Form< Interval<T, Interval_Info> >& lf, assign_r(curr_lb, curr_coefficient->lower(), ROUND_NOT_NEEDED); assign_r(curr_ub, curr_coefficient->upper(), ROUND_NOT_NEEDED); if (curr_lb != 0 || curr_ub != 0) { - // FIXME: ensure that ROUND_IGNORE works fine with divisions by 2. assign_r(curr_var_ub, matrix[n_var+1][n_var], ROUND_NOT_NEEDED); - div_2exp_assign_r(curr_var_ub, curr_var_ub, 1, ROUND_IGNORE); + div_2exp_assign_r(curr_var_ub, curr_var_ub, 1, ROUND_UP); neg_assign_r(curr_minus_var_ub, matrix[n_var][n_var+1], ROUND_NOT_NEEDED); - div_2exp_assign_r(curr_minus_var_ub, curr_minus_var_ub, 1, ROUND_IGNORE); + div_2exp_assign_r(curr_minus_var_ub, curr_minus_var_ub, 1, ROUND_UP); // Optimize the most common case: curr = +/-[1;1] if (curr_lb == 1 && curr_ub == 1) { add_assign_r(result, result, std::max(curr_var_ub, curr_minus_var_ub), @@ -5456,10 +5456,9 @@ refine_fp_interval_abstract_store( FP_Interval_Type& curr_int = ite->second; T& lb = curr_int.lower(); T& ub = curr_int.upper(); - // FIXME: are we sure that ROUND_IGNORE is good? // Now get the upper bound for curr_var in the octagon. assign_r(upper_bound, matrix[n_curr_var+1][n_curr_var], ROUND_NOT_NEEDED); - div_2exp_assign_r(upper_bound, upper_bound, 1, ROUND_IGNORE); + div_2exp_assign_r(upper_bound, upper_bound, 1, ROUND_UP);
if (upper_bound < ub) ub = upper_bound.raw_value(); @@ -5467,7 +5466,7 @@ refine_fp_interval_abstract_store( // Now get the lower bound for curr_var in the octagon. neg_assign_r(upper_bound, matrix[n_curr_var][n_curr_var+1], ROUND_NOT_NEEDED); - div_2exp_assign_r(upper_bound, upper_bound, 1, ROUND_IGNORE); + div_2exp_assign_r(upper_bound, upper_bound, 1, ROUND_DOWN);
if (upper_bound > lb) lb = upper_bound.raw_value();