piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-25 15:19:42 -06:00
Code Issues Packages Projects Releases Wiki Activity

[ARM] Push new ArmEmitter changes from PPSSPP. Mostly Fixes a few VFP/NEON instruction encodings.

Browse Source
This commit is contained in:
Ryan Houdek
2013-08-02 23:18:44 +00:00
parent c1baed086d
commit ab0f42636d
3 changed files with 262 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

89
Source/Core/Common/Src/ArmCPUDetect.cpp
View File

@ -17,9 +17,10 @@
#include "Common.h"
#include "CPUDetect.h"
#include "StringUtil.h"
#include "FileUtil.h"
// Only Linux platforms have /proc/cpuinfo
#if !defined(BLACKBERRY) && !defined(IOS) && !defined(__SYMBIAN32__)
const char procfile[] = "/proc/cpuinfo";
char *GetCPUString()
@ -33,7 +34,7 @@ char *GetCPUString()
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
@ -42,6 +43,7 @@ char *GetCPUString()
cpu_string = strndup(cpu_string, strlen(cpu_string) - 1); // Strip the newline
break;
}
return cpu_string;
}
@ -91,14 +93,13 @@ unsigned short GetCPUPart()
break;
}
return part;
}
bool CheckCPUFeature(const char *feature)
{
const char marker[] = "Features\t: ";
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
@ -117,10 +118,18 @@ bool CheckCPUFeature(const char *feature)
token = strtok(NULL, " ");
}
}
return false;
}
#endif
int GetCoreCount()
{
#ifdef __SYMBIAN32__
return 1;
#elif defined(BLACKBERRY) || defined(IOS)
return 2;
#else
const char marker[] = "processor\t: ";
int cores = 0;
char buf[1024];
@ -129,14 +138,16 @@ int GetCoreCount()
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
++cores;
}
return cores;
#endif
}
CPUInfo cpu_info;
@ -153,12 +164,58 @@ void CPUInfo::Detect()
HTT = false;
OS64bit = false;
CPU64bit = false;
Mode64bit = false;
Mode64bit = false;
vendor = VENDOR_ARM;
// Get the information about the CPU
strncpy(cpu_string, GetCPUString(), sizeof(cpu_string));
num_cores = GetCoreCount();
#if defined(__SYMBIAN32__) || defined(BLACKBERRY) || defined(IOS)
bool isVFP3 = false;
bool isVFP4 = false;
#ifdef IOS
isVFP3 = true;
// Check for swift arch (VFP4`)
#ifdef __ARM_ARCH_7S__
isVFP4 = true;
#endif // #ifdef __ARM_ARCH_7S__
#elif defined(BLACKBERRY)
isVFP3 = true;
const char cpuInfoPath[] = "/pps/services/hw_info/inventory";
const char marker[] = "Processor_Name::";
const char qcCPU[] = "MSM";
char buf[1024];
FILE* fp;
if (fp = fopen(cpuInfoPath, "r"))
{
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
if (strncmp(buf + sizeof(marker) - 1, qcCPU, sizeof(qcCPU) - 1) == 0)
isVFP4 = true;
break;
}
fclose(fp);
}
#endif
// Hardcode this for now
bSwp = true;
bHalf = true;
bThumb = false;
bFastMult = true;
bVFP = true;
bEDSP = true;
bThumbEE = isVFP3;
bNEON = isVFP3;
bVFPv3 = isVFP3;
bTLS = true;
bVFPv4 = isVFP4;
bIDIVa = isVFP4;
bIDIVt = isVFP4;
bFP = false;
bASIMD = false;
#else
strncpy(cpu_string, GetCPUString(), sizeof(cpu_string));
bSwp = CheckCPUFeature("swp");
bHalf = CheckCPUFeature("half");
bThumb = CheckCPUFeature("thumb");
@ -172,16 +229,15 @@ void CPUInfo::Detect()
bVFPv4 = CheckCPUFeature("vfpv4");
bIDIVa = CheckCPUFeature("idiva");
bIDIVt = CheckCPUFeature("idivt");
// Qualcomm Krait supports IDIVA but it doesn't report it. Check for krait.
if (GetCPUImplementer() == 0x51 && GetCPUPart() == 0x6F) // Krait(300) is 0x6F, Scorpion is 0x4D
bIDIVa = bIDIVt = true;
// These two are ARMv8 specific.
bIDIVa = bIDIVt = true;
// These two require ARMv8 or higher
bFP = CheckCPUFeature("fp");
bASIMD = CheckCPUFeature("asimd");
#endif
// On android, we build a separate library for ARMv7 so this is fine.
// TODO: Check for ARMv7 on other platforms.
#if defined(__ARM_ARCH_7A__)
bArmV7 = true;
#else
@ -193,11 +249,14 @@ void CPUInfo::Detect()
std::string CPUInfo::Summarize()
{
std::string sum;
#if defined(BLACKBERRY) || defined(IOS) || defined(__SYMBIAN32__)
sum = StringFromFormat("%i cores", num_cores);
#else
if (num_cores == 1)
sum = StringFromFormat("%s, %i core", cpu_string, num_cores);
else
sum = StringFromFormat("%s, %i cores", cpu_string, num_cores);
#endif
if (bSwp) sum += ", SWP";
if (bHalf) sum += ", Half";
if (bThumb) sum += ", Thumb";