From 680eaaac41bc64000faa483955279155b0fc0a6b Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Sat, 6 Sep 2014 19:31:04 +0200 Subject: [PATCH] Fixed $clog2 (off by one error) --- frontends/ast/simplify.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 1998c12e4..9e797573c 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -1123,7 +1123,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT) log_error("Unsupported expression on dynamic range select on signal `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); - result_width = left_at_zero_ast->integer - right_at_zero_ast->integer + 1; + result_width = abs(left_at_zero_ast->integer - right_at_zero_ast->integer) + 1; } did_something = true; newNode = new AstNode(AST_CASE, shift_expr); @@ -1370,7 +1370,7 @@ skip_dynamic_range_lvalue_expansion:; uint32_t result = 0; for (size_t i = 0; i < arg_value.bits.size(); i++) if (arg_value.bits.at(i) == RTLIL::State::S1) - result = i; + result = i + 1; newNode = mkconst_int(result, false); goto apply_newNode; -- 2.30.2