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Added support for simple gates with one constant input to opt_const

This commit is contained in:
Clifford Wolf 2013-02-27 18:00:01 +01:00
parent da3d55a29c
commit 1bbc2b34c8
1 changed files with 6 additions and 0 deletions
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6
passes/opt/opt_const.cc
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@ -76,6 +76,8 @@ void replace_const_cells(RTLIL::Module *module)
if (input.match("11")) ACTION_DO_Y(1);
if (input.match(" *")) ACTION_DO_Y(x);
if (input.match("* ")) ACTION_DO_Y(x);
if (input.match(" 1")) ACTION_DO("\\Y", input.extract(1, 1));
if (input.match("1 ")) ACTION_DO("\\Y", input.extract(0, 1));
}
if (cell->type == "$_OR_") {
@ -88,6 +90,8 @@ void replace_const_cells(RTLIL::Module *module)
if (input.match("00")) ACTION_DO_Y(0);
if (input.match(" *")) ACTION_DO_Y(x);
if (input.match("* ")) ACTION_DO_Y(x);
if (input.match(" 0")) ACTION_DO("\\Y", input.extract(1, 1));
if (input.match("0 ")) ACTION_DO("\\Y", input.extract(0, 1));
}
if (cell->type == "$_XOR_") {
@ -101,6 +105,8 @@ void replace_const_cells(RTLIL::Module *module)
if (input.match("11")) ACTION_DO_Y(0);
if (input.match(" *")) ACTION_DO_Y(x);
if (input.match("* ")) ACTION_DO_Y(x);
if (input.match(" 0")) ACTION_DO("\\Y", input.extract(1, 1));
if (input.match("0 ")) ACTION_DO("\\Y", input.extract(0, 1));
}
if (cell->type == "$_MUX_") {