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ice40: Add fallback behavior for Extra Cell config bits vectors

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This helps make new nextpnr compatible with old chipdbs when a parameters
goes from single bit to multi bit.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2020-06-02 20:21:05 +02:00
parent 5e2b6bcef9
commit 9b71bba747
1 changed files with 11 additions and 1 deletions
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12
ice40/bitstream.cc
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@ -133,6 +133,16 @@ static const BelConfigPOD &get_ec_config(const ChipInfoPOD *chip, BelId bel)
typedef std::vector<std::vector<std::vector<std::vector<int8_t>>>> chipconfig_t;
static bool has_ec_cbit(const BelConfigPOD &cell_cbits, std::string name)
{
for (int i = 0; i < cell_cbits.num_entries; i++) {
const auto &cbit = cell_cbits.entries[i];
if (cbit.entry_name.get() == name)
return true;
}
return false;
}
static void set_ec_cbit(chipconfig_t &config, const Context *ctx, const BelConfigPOD &cell_cbits, std::string name,
bool value, std::string prefix)
{
@ -190,7 +200,7 @@ void configure_extra_cell(chipconfig_t &config, const Context *ctx, CellInfo *ce
}
value.resize(p.second);
if (p.second == 1) {
if ((p.second == 1) || !has_ec_cbit(bc, p.first + "_0")) {
set_ec_cbit(config, ctx, bc, p.first, value.at(0), prefix);
} else {
for (int i = 0; i < p.second; i++) {