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Reduce branching

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This commit is contained in:
Victor Zverovich
2020-06-12 19:46:00 -07:00
parent 9edee0e727
commit 23b976a615
1 changed files with 4 additions and 8 deletions
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12
include/fmt/format.h
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@ -2971,14 +2971,9 @@ class format_int {
// memcpy is faster than copying character by character. // memcpy is faster than copying character by character.
memcpy(ptr, detail::data::digits + index, 2); memcpy(ptr, detail::data::digits + index, 2);
} }
if (value < 10) {
*--ptr = static_cast<char>('0' + value);
return ptr;
}
auto index = static_cast<unsigned>(value * 2); auto index = static_cast<unsigned>(value * 2);
ptr -= 2; memcpy(ptr - 2, detail::data::digits + index, 2);
memcpy(ptr, detail::data::digits + index, 2); return ptr - 1 - (value >= 10 ? 1 : 0);
return ptr;
} }
void format_signed(long long value) { void format_signed(long long value) {
@ -2986,7 +2981,8 @@ class format_int {
bool negative = value < 0; bool negative = value < 0;
if (negative) abs_value = 0 - abs_value; if (negative) abs_value = 0 - abs_value;
str_ = format_decimal(abs_value); str_ = format_decimal(abs_value);
if (negative) *--str_ = '-'; str_[-1] = '-';
str_ -= negative ? 1 : 0;
} }
public: public: