riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Fixed part selects of parameters

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
frontends/ast/genrtlil.cc
View File

@ -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) {

23
frontends/ast/simplify.cc
View File

@ -575,6 +575,10 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
children[0]->is_signed = is_signed;
}
range_valid = true;
range_swapped = children[1]->range_swapped;
range_left = children[1]->range_left;
range_right = children[1]->range_right;
} else
if (children.size() > 1 && children[1]->type == AST_REALVALUE && children[0]->type == AST_CONSTANT) {
double as_realvalue = children[0]->asReal(sign_hint);
@ -1522,8 +1526,23 @@ skip_dynamic_range_lvalue_expansion:;
if (current_scope[str]->children[0]->type == AST_CONSTANT) {
if (children.size() != 0 && children[0]->type == AST_RANGE && children[0]->range_valid) {
std::vector<RTLIL::State> data;
for (int i = children[0]->range_right; i <= children[0]->range_left; i++)
data.push_back(current_scope[str]->children[0]->bits[i]);
bool param_upto = current_scope[str]->range_valid && current_scope[str]->range_swapped;
int param_offset = current_scope[str]->range_valid ? current_scope[str]->range_right : 0;
int param_width = current_scope[str]->range_valid ? current_scope[str]->range_left - current_scope[str]->range_right + 1 :
SIZE(current_scope[str]->children[0]->bits);
int tmp_range_left = children[0]->range_left, tmp_range_right = children[0]->range_right;
if (param_upto) {
tmp_range_left = (param_width + 2*param_offset) - children[0]->range_right - 1;
tmp_range_right = (param_width + 2*param_offset) - children[0]->range_left - 1;
}
log_dump(param_upto, param_offset, param_width, children[0]->range_left, children[0]->range_right, tmp_range_left, tmp_range_right);
for (int i = tmp_range_right; i <= tmp_range_left; i++) {
int index = i - param_offset;
if (0 <= index && index < param_width)
data.push_back(current_scope[str]->children[0]->bits[index]);
else
data.push_back(RTLIL::State::Sx);
}
newNode = mkconst_bits(data, false);
} else
if (children.size() == 0)