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Fixed part selects of parameters

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This commit is contained in:
Clifford Wolf 2014-07-28 16:45:26 +02:00
parent a03297a7df
commit ec58965967
2 changed files with 31 additions and 7 deletions
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15
frontends/ast/genrtlil.cc
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@ -902,6 +902,8 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
use_const_chunk:
if (children.size() != 0) {
log_assert(children[0]->type == AST_RANGE);
int source_width = id2ast->range_left - id2ast->range_right + 1;
int source_offset = id2ast->range_right;
if (!children[0]->range_valid) {
AstNode *left_at_zero_ast = children[0]->children[0]->clone();
AstNode *right_at_zero_ast = children[0]->children.size() >= 2 ? children[0]->children[1]->clone() : left_at_zero_ast->clone();
@ -914,17 +916,20 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
AstNode *fake_ast = new AstNode(AST_NONE, clone(), children[0]->children.size() >= 2 ?
children[0]->children[1]->clone() : children[0]->children[0]->clone());
fake_ast->children[0]->delete_children();
RTLIL::SigSpec sig = binop2rtlil(fake_ast, "$shr", width,
fake_ast->children[0]->genRTLIL(), !id2ast->range_swapped ? fake_ast->children[1]->genRTLIL() :
current_module->Sub(NEW_ID, RTLIL::SigSpec(wire->width - width), fake_ast->children[1]->genRTLIL()));
RTLIL::SigSpec shift_val = fake_ast->children[1]->genRTLIL();
log_dump(width, shift_val, id2ast->range_swapped, source_width, id2ast->range_left, id2ast->range_right);
if (id2ast->range_right != 0)
shift_val = current_module->Sub(NEW_ID, shift_val, id2ast->range_right);
if (id2ast->range_swapped)
shift_val = current_module->Sub(NEW_ID, RTLIL::SigSpec(source_width - width), shift_val);
RTLIL::SigSpec sig = binop2rtlil(fake_ast, "$shr", width, fake_ast->children[0]->genRTLIL(), shift_val);
delete left_at_zero_ast;
delete right_at_zero_ast;
delete fake_ast;
return sig;
} else {
int source_width = id2ast->range_left - id2ast->range_right + 1;
chunk.width = children[0]->range_left - children[0]->range_right + 1;
chunk.offset = children[0]->range_right - id2ast->range_right;
chunk.offset = children[0]->range_right - source_offset;
if (id2ast->range_swapped)
chunk.offset = (id2ast->range_left - id2ast->range_right + 1) - (chunk.offset + chunk.width);
if (chunk.offset >= source_width || chunk.offset + chunk.width < 0) {