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Merge pull request #1258 from FioraAeterna/avoidfmulround

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JIT: optimize single-precision ops based on knowledge of their inputs
This commit is contained in:
Ryan Houdek
2014-11-30 15:47:34 -06:00
parent db9cd8e3d7 72c96c20d3
commit 414e36d8c9
11 changed files with 205 additions and 67 deletions
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2
Source/Core/Common/CPUDetect.h
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@ -50,10 +50,10 @@ struct CPUInfo
bool bMOVBE;
// This flag indicates that the hardware supports some mode
// in which denormal inputs _and_ outputs are automatically set to (signed) zero.
// TODO: ARM
bool bFlushToZero;
bool bLAHFSAHF64;
bool bLongMode;
bool bAtom;
// ARM specific CPUInfo
bool bSwp;

6
Source/Core/Common/x64CPUDetect.cpp
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@ -129,6 +129,12 @@ void CPUInfo::Detect()
if (max_std_fn >= 1)
{
__cpuid(cpu_id, 0x00000001);
int family = ((cpu_id[0] >> 8) & 0xf) + ((cpu_id[0] >> 20) & 0xff);
int model = ((cpu_id[0] >> 4) & 0xf) + ((cpu_id[0] >> 12) & 0xf0);
// Detect people unfortunate enough to be running Dolphin on an Atom
if (family == 6 && (model == 0x1C || model == 0x26 ||model == 0x27 || model == 0x35 || model == 0x36 ||
model == 0x37 || model == 0x4A || model == 0x4D || model == 0x5A || model == 0x5D))
bAtom = true;
logical_cpu_count = (cpu_id[1] >> 16) & 0xFF;
ht = (cpu_id[3] >> 28) & 1;