[ARM] Push new ArmEmitter changes from PPSSPP. Mostly Fixes a few VFP…

…/NEON instruction encodings.

Source/Core/Common/Src/ArmCPUDetect.cpp

@@ -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";