Module: ppl/ppl Branch: floating_point Commit: e86a215e5bf18ca9785be5d79e199fe170bccd28 URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=e86a215e5bf18...
Author: Fabio Bossi bossi@cs.unipr.it Date: Fri Sep 11 14:12:30 2009 +0200
Implemented another case for affine_image.
---
src/Octagonal_Shape.templates.hh | 53 ++++++++++++++++++++++++++++++------- 1 files changed, 43 insertions(+), 10 deletions(-)
diff --git a/src/Octagonal_Shape.templates.hh b/src/Octagonal_Shape.templates.hh index 69f876d..0d6b04a 100644 --- a/src/Octagonal_Shape.templates.hh +++ b/src/Octagonal_Shape.templates.hh @@ -4724,11 +4724,6 @@ Octagonal_Shape<T>::affine_image(Variable var, const dimension_type n_var = 2*var_id; const FP_Interval_Type& b = lf.inhomogeneous_term();
- PPL_DIRTY_TEMP(N, b_lb); - PPL_DIRTY_TEMP(N, b_ub); - assign_r(b_lb, b.lower(), ROUND_NOT_NEEDED); - assign_r(b_ub, b.upper(), ROUND_NOT_NEEDED); - // `w' is the variable with index `w_id'. // Now we know the form of `lf': // - If t == 0, then lf == [lb;ub]; @@ -4740,11 +4735,10 @@ Octagonal_Shape<T>::affine_image(Variable var, // Case 1: lf = [lb;ub]; forget_all_octagonal_constraints(var_id); PPL_DIRTY_TEMP(N, two_mlb); + neg_assign_r(two_mlb, b.lower(), ROUND_NOT_NEEDED); + mul_2exp_assign_r(two_mlb, two_mlb, 1, ROUND_UP); PPL_DIRTY_TEMP(N, two_ub); - neg_assign_r(two_mlb, b_lb, ROUND_NOT_NEEDED); - assign_r(two_ub, b_ub, ROUND_NOT_NEEDED); - add_assign_r(two_mlb, two_mlb, two_mlb, ROUND_UP); - add_assign_r(two_ub, two_ub, two_ub, ROUND_UP); + mul_2exp_assign_r(two_ub, b.upper(), 1, ROUND_UP); // Add the constraint `var >= lb && var <= ub'. add_octagonal_constraint(n_var+1, n_var, two_ub); add_octagonal_constraint(n_var, n_var+1, two_mlb); @@ -4752,6 +4746,11 @@ Octagonal_Shape<T>::affine_image(Variable var, return; }
+ PPL_DIRTY_TEMP(N, b_ub); + assign_r(b_ub, b.upper(), ROUND_NOT_NEEDED); + PPL_DIRTY_TEMP(N, b_lb); + assign_r(b_lb, b.lower(), ROUND_NOT_NEEDED); + // true if b = [0;0]. bool is_b_zero = (b_lb == 0 && b_ub == 0);
@@ -4775,8 +4774,42 @@ Octagonal_Shape<T>::affine_image(Variable var, // The transformation is the identity function. return; else { - + // Translate all the constraints on `var' by adding the value + // `b_ub' or subtracting the value `b_lb'. + PPL_DIRTY_TEMP(N, b_mlb); + neg_assign_r(b_mlb, b_lb, ROUND_NOT_NEEDED); + const Row_Iterator m_begin = matrix.row_begin(); + const Row_Iterator m_end = matrix.row_end(); + Row_Iterator m_iter = m_begin + n_var; + Row_Reference m_v = *m_iter; + ++m_iter; + Row_Reference m_cv = *m_iter; + ++m_iter; + // NOTE: delay update of unary constraints on `var' + for (dimension_type j = n_var; j-- > 0; ) { + N& m_v_j = m_v[j]; + add_assign_r(m_v_j, m_v_j, b_mlb, ROUND_UP); + N& m_cv_j = m_cv[j]; + add_assign_r(m_cv_j, m_cv_j, b_ub, ROUND_UP); + } + for ( ; m_iter != m_end; ++m_iter) { + Row_Reference m_i = *m_iter; + N& m_i_v = m_i[n_var]; + add_assign_r(m_i_v, m_i_v, b_ub, ROUND_UP); + N& m_i_cv = m_i[n_var+1]; + add_assign_r(m_i_cv, m_i_cv, b_mlb, ROUND_UP); + } + // Now update unary constraints on var. + // FIXME: are we sure that ROUND_IGNORE is good? + mul_2exp_assign_r(b_ub, b_ub, 1, ROUND_IGNORE); + 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); + N& m_v_cv = m_v[n_var+1]; + add_assign_r(m_v_cv, m_v_cv, b_mlb, ROUND_UP); } + // FIXME: can't we put it above? + reset_strongly_closed(); } // Here `w_coeff = [-1;-1]. }