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Properly handle move semantics in the scoped FTZ

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Robbert van der Helm
2021-04-28 12:43:46 +02:00
parent 93f089eca7
commit 160c6acb85
2 changed files with 19 additions and 2 deletions
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src/common/utils.cpp
+15 -1
View File
@@ -54,5 +54,19 @@ ScopedFlushToZero::ScopedFlushToZero() {
}
ScopedFlushToZero::~ScopedFlushToZero() {
_MM_SET_FLUSH_ZERO_MODE(old_ftz_mode);
if (old_ftz_mode) {
_MM_SET_FLUSH_ZERO_MODE(*old_ftz_mode);
}
}
ScopedFlushToZero::ScopedFlushToZero(ScopedFlushToZero&& o)
: old_ftz_mode(std::move(o.old_ftz_mode)) {
o.old_ftz_mode.reset();
}
ScopedFlushToZero& ScopedFlushToZero::operator=(ScopedFlushToZero&& o) {
old_ftz_mode = std::move(o.old_ftz_mode);
o.old_ftz_mode.reset();
return *this;
}
src/common/utils.h
+4 -1
View File
@@ -97,6 +97,9 @@ class ScopedFlushToZero {
ScopedFlushToZero(const ScopedFlushToZero&) = delete;
ScopedFlushToZero& operator=(const ScopedFlushToZero&) = delete;
ScopedFlushToZero(ScopedFlushToZero&&);
ScopedFlushToZero& operator=(ScopedFlushToZero&&);
private:
/**
* The previous FTZ mode. When we use this on the Wine side, this should
@@ -104,5 +107,5 @@ class ScopedFlushToZero {
* don't accidentally end up disabling FTZ somewhere where it should be
* enabled.
*/
unsigned int old_ftz_mode;
std::optional<unsigned int> old_ftz_mode;
};