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fmt,cxxrtl: add option to group digits in numbers.

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The option is serialized to RTLIL as `_` (to match Python's option with
the same symbol), and sets the `group` flag. This flag inserts an `_`
symbol between each group of 3 digits (for decimal) or four digits (for
binary, hex, and octal).
This commit is contained in:
Catherine 2024-03-28 08:55:26 +00:00 • committed by Marcelina Kościelnicka
parent 7b94599162
commit 00c5b60dfd
3 changed files with 42 additions and 5 deletions
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17
backends/cxxrtl/runtime/cxxrtl/cxxrtl.h
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@ -1042,6 +1042,7 @@ struct fmt_part {
} sign; // = MINUS;
bool hex_upper; // = false;
bool show_base; // = false;
bool group; // = false;
// VLOG_TIME type
bool realtime; // = false;
@ -1104,13 +1105,19 @@ struct fmt_part {
}
if (base == 2) {
for (size_t index = 0; index < width; index++) {
if (group && index > 0 && index % 4 == 0)
buf += '_';
buf += (val.bit(index) ? '1' : '0');
}
if (show_base)
buf += "0b";
for (size_t i = width; i > 0; i--)
buf += (val.bit(i - 1) ? '1' : '0');
buf += "b0";
std::reverse(buf.begin(), buf.end());
} else if (base == 8 || base == 16) {
size_t step = (base == 16) ? 4 : 3;
for (size_t index = 0; index < width; index += step) {
if (group && index > 0 && index % (4 * step) == 0)
buf += '_';
uint8_t value = val.bit(index) | (val.bit(index + 1) << 1) | (val.bit(index + 2) << 2);
if (step == 4)
value |= val.bit(index + 3) << 3;
@ -1126,7 +1133,10 @@ struct fmt_part {
if (val.is_zero())
buf += '0';
value<(Bits > 4 ? Bits : 4)> xval = val.template zext<(Bits > 4 ? Bits : 4)>();
size_t index = 0;
while (!xval.is_zero()) {
if (group && index > 0 && index % 3 == 0)
buf += '_';
value<(Bits > 4 ? Bits : 4)> quotient, remainder;
if (Bits >= 4)
std::tie(quotient, remainder) = xval.udivmod(value<(Bits > 4 ? Bits : 4)>{10u});
@ -1134,6 +1144,7 @@ struct fmt_part {
std::tie(quotient, remainder) = std::make_pair(value<(Bits > 4 ? Bits : 4)>{0u}, xval);
buf += '0' + remainder.template trunc<4>().template get<uint8_t>();
xval = quotient;
index++;
}
if (show_base)
buf += "d0";