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FEXCore: Implements support for RPRES

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This allows us to use reciprocal instructions which matches precision of
what x86 expects rather than converting everything to float divides.

Currently no hardware supports this, and even the upcoming X4/A720/A520
won't support it, but it was trivial to implement so wire it up.
This commit is contained in:
Ryan Houdek committed 2023-10-07 23:13:47 -07:00
1 parent 6543a80ff9
commit 22590dde77
8 files changed
+74 -2
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Source/Tools/CodeSizeValidation/Main.cpp
+7
View File
@@ -463,6 +463,7 @@ int main(int argc, char **argv, char **const envp) {
FEATURE_FCMA = (1U << 4),
FEATURE_CSSC = (1U << 5),
FEATURE_AFP = (1U << 6),
FEATURE_RPRES = (1U << 7),
};
uint64_t SVEWidth = 0;
@@ -490,6 +491,9 @@ int main(int argc, char **argv, char **const envp) {
if (TestHeaderData->EnabledHostFeatures & FEATURE_AFP) {
HostFeatureControl |= static_cast<uint64_t>(FEXCore::Config::HostFeatures::ENABLEAFP);
}
if (TestHeaderData->EnabledHostFeatures & FEATURE_RPRES) {
HostFeatureControl |= static_cast<uint64_t>(FEXCore::Config::HostFeatures::ENABLERPRES);
}
// Always enable ARMv8.1 LSE atomics.
HostFeatureControl |= static_cast<uint64_t>(FEXCore::Config::HostFeatures::ENABLEATOMICS);
@@ -517,6 +521,9 @@ int main(int argc, char **argv, char **const envp) {
if (TestHeaderData->DisabledHostFeatures & FEATURE_AFP) {
HostFeatureControl |= static_cast<uint64_t>(FEXCore::Config::HostFeatures::DISABLEAFP);
}
if (TestHeaderData->DisabledHostFeatures & FEATURE_RPRES) {
HostFeatureControl |= static_cast<uint64_t>(FEXCore::Config::HostFeatures::DISABLERPRES);
}
FEXCore::Config::EraseSet(FEXCore::Config::CONFIG_HOSTFEATURES, fextl::fmt::format("{}", HostFeatureControl));
FEXCore::Config::EraseSet(FEXCore::Config::CONFIG_FORCESVEWIDTH, fextl::fmt::format("{}", SVEWidth));