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MathUtil: Change Log2 return value to int

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Log2(u64) can't be bigger than 63, so there is no need in forcing a 64 bit value.
So just using a common int seems more natural.
This commit is contained in:
degasus 2014-02-24 10:20:53 +01:00
parent f99c8a0b70
commit 94da4e1aa2
2 changed files with 6 additions and 6 deletions
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4
Source/Core/Common/MathUtil.h
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@ -150,7 +150,7 @@ float MathFloatVectorSum(const std::vector<float>&);
#define ROUND_DOWN(x, a) ((x) & ~((a) - 1)) #define ROUND_DOWN(x, a) ((x) & ~((a) - 1))
// Rounds down. 0 -> undefined // Rounds down. 0 -> undefined
inline u64 Log2(u64 val) inline int Log2(u64 val)
{ {
#if defined(__GNUC__) #if defined(__GNUC__)
return 63 - __builtin_clzll(val); return 63 - __builtin_clzll(val);
@ -161,7 +161,7 @@ inline u64 Log2(u64 val)
return result; return result;
#else #else
u64 result = -1; int result = -1;
while (val != 0) while (val != 0)
{ {
val >>= 1; val >>= 1;

8
Source/Core/DolphinWX/GameListCtrl.cpp
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@ -413,12 +413,12 @@ wxString NiceSizeFormat(u64 _size)
{ {
const char* const unit_symbols[] = {"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}; const char* const unit_symbols[] = {"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"};
auto const unit = Log2(std::max<u64>(_size, 1)) / 10; const u64 unit = Log2(std::max<u64>(_size, 1)) / 10;
auto const unit_size = (1 << (unit * 10)); const u64 unit_size = (1 << (unit * 10));
// ugly rounding integer math // ugly rounding integer math
auto const value = (_size + unit_size / 2) / unit_size; const u64 value = (_size + unit_size / 2) / unit_size;
auto const frac = (_size % unit_size * 10 + unit_size / 2) / unit_size % 10; const u64 frac = (_size % unit_size * 10 + unit_size / 2) / unit_size % 10;
return StrToWxStr(StringFromFormat("%" PRIu64 ".%" PRIu64 " %s", value, frac, unit_symbols[unit])); return StrToWxStr(StringFromFormat("%" PRIu64 ".%" PRIu64 " %s", value, frac, unit_symbols[unit]));
} }