cpuid: prefix every function with cpuid_

Also merge extended features and non-extended in 1 function.

Suggested-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

ccan/cpuid/cpuid.c

@@ -58,19 +58,49 @@ static void ___cpuid(cpuid_t info, uint32_t *eax, uint32_t *ebx, uint32_t *ecx,
 }
 #endif
 
-int highest_ext_func_supported(void)
-{
-	static int highest;
+static struct {
+	int feature;
+	unsigned mask;
+	int instruction; 	/* 0 = ecx, 1 = edx.  */
+} features[] = {
+	{ CF_MMX, 		1 << 23, 	1 },
+	{ CF_SSE, 		1 << 25, 	1 },
+	{ CF_SSE2, 		1 << 26, 	1 },
+	{ CF_SSE3, 		1 << 9,  	0 },
+	{ CF_FPU, 		1 << 0,  	1 },
+
+	{ CF_TSC, 		1 << 4,  	1 },
+	{ CF_MSR, 		1 << 5,  	1 },
+
+	{ CF_SSSE3,     	1 << 9,  	0 },
+	{ CF_AVX, 		1 << 28, 	0 },
+
+	/* Extended ones.  */
+	{ CEF_x64, 		1 << 30, 	1 },
+	{ CEF_FPU, 		1 << 0,  	1 },
+	{ CEF_DE, 		1 << 2,  	1 },
+	{ CEF_SYSCALLRET, 	1 << 11, 	1 },
+	{ CEF_CMOV, 		1 << 15, 	1 },
+
+	{ CEF_SSE4a, 		1 << 6, 	0 },
+	{ CEF_FMA4, 		1 << 16, 	0 },
+	{ CEF_XOP, 		1 << 11, 	0 }
+};
 
-	if (!highest) {
-		asm volatile(
-			"cpuid\n\t"
-			: "=a" (highest)
-			: "a" (CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED)
-		);
+static int has_feature(int feature, uint32_t ecx, uint32_t edx)
+{
+	int i;
+
+	for (i = 0; i < sizeof(features) / sizeof(features[0]); ++i) {
+		if (features[i].feature == feature) {
+			if (features[i].instruction == 0)
+				return (ecx & features[i].mask);
+			else
+				return (edx & features[i].mask);
+		}
 	}
 
-	return highest;
+	return 0;
 }
 
 int cpuid_test_feature(cpuid_t feature)
@@ -78,48 +108,19 @@ int cpuid_test_feature(cpuid_t feature)
 	if (feature > CPU_VIRT_PHYS_ADDR_SIZES || feature < CPU_EXTENDED_PROC_INFO_FEATURE_BITS)
 		return 0;
 
-	return (feature <= highest_ext_func_supported());
-}
-
-int cpuid_has_feature(cpufeature_t feature)
-{
-	uint32_t eax, ebx, ecx, edx;
-
-	___cpuid(CPU_PROCINFO_AND_FEATUREBITS, &eax, &ebx, &ecx, &edx);
-	switch (feature) {
-		case CF_MMX:
-		case CF_SSE:
-		case CF_SSE2:
-			return (edx & ((int)feature)) != 0;
-		case CF_SSE3:
-		case CF_SSSE3:
-		case CF_SSE41:
-		case CF_SSE42:
-		case CF_AVX:
-		case CF_FMA:
-			return (ecx & ((int)feature)) != 0;
-	}
-
-	return 0;
+	return (feature <= cpuid_highest_ext_func_supported());
 }
 
-int cpuid_has_ext_feature(cpuextfeature_t extfeature)
+int cpuid_has_feature(int feature, int extended)
 {
 	uint32_t eax, ebx, ecx, edx;
-	if (!cpuid_test_feature(CPU_EXTENDED_PROC_INFO_FEATURE_BITS))
-		return 0;
 
-	___cpuid(CPU_EXTENDED_PROC_INFO_FEATURE_BITS, &eax, &ebx, &ecx, &edx);
-	switch (extfeature) {
-		case CEF_x64:
-			return (edx & ((int)extfeature)) != 0;
-		case CEF_SSE4a:
-		case CEF_FMA4:
-		case CEF_XOP:
-			return (ecx & ((int)extfeature)) != 0;
-	}
+	if (extended == 0)
+		___cpuid(CPU_PROCINFO_AND_FEATUREBITS, &eax, &ebx, &ecx, &edx);
+	else
+		___cpuid(CPU_EXTENDED_PROC_INFO_FEATURE_BITS, &eax, &ebx, &ecx, &edx);
 
-	return 0;
+	return has_feature(feature, ecx, edx);
 }
 
 static const char *cpuids[] = {
@@ -141,7 +142,7 @@ static const char *cpuids[] = {
 	"KVMKVMKVMKVM"
 };
 
-cputype_t get_cpu_type(void)
+cputype_t cpuid_get_cpu_type(void)
 {
 	static cputype_t cputype;
 	if (cputype == CT_NONE) {
@@ -165,11 +166,26 @@ cputype_t get_cpu_type(void)
 	return cputype;
 }
 
-const char *get_cpu_type_string(const cputype_t cputype)
+const char *cpuid_get_cpu_type_string(const cputype_t cputype)
 {
 	return cpuids[(int)cputype];
 }
 
+int cpuid_highest_ext_func_supported(void)
+{
+	static int highest;
+
+	if (!highest) {
+		asm volatile(
+			"cpuid\n\t"
+			: "=a" (highest)
+			: "a" (CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED)
+		);
+	}
+
+	return highest;
+}
+
 void cpuid(cpuid_t info, void *buf)
 {
 	/* Sanity checks, make sure we're not trying to do something
@@ -186,7 +202,7 @@ void cpuid(cpuid_t info, void *buf)
 		___cpuid(CPU_PROC_BRAND_STRING_INTERNAL1, &ubuf[8], &ubuf[9], &ubuf[10], &ubuf[11]);
 		return;
 	} else if (info == CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED) {
-		*ubuf = highest_ext_func_supported();
+		*ubuf = cpuid_highest_ext_func_supported();
 		return;
 	}
 

ccan/cpuid/cpuid.h

@@ -73,63 +73,26 @@ typedef enum cpuid {
 	CPU_VIRT_PHYS_ADDR_SIZES 			= 0x80000008
 } cpuid_t;
 
-/**
- * enum cpufeature
- *
- * This is used by cpuid_has_feature().
- *
- * CF_MMX:
- * 	Test for MMX support.
- *
- * CF_SSE*:
- * 	Test for SSE* support.
- *
- * CF_AVX:
- * 	Test for AVX support.
- *
- * CF_FMA:
- * 	Test for FMA support.
- */
-
-typedef enum cpufeature {
-	CF_MMX 		= 1 << 23,
-	CF_SSE 		= 1 << 25,
-	CF_SSE2 	= 1 << 26,
-	CF_SSE3 	= 1 << 0,
-
-	CF_SSSE3 	= 1 << 9,
-	CF_SSE41 	= 1 << 19,
-	CF_SSE42 	= 1 << 20,
-
-	CF_AVX 		= 1 << 28,
-	CF_FMA 		= 1 << 12
-} cpufeature_t;
-
-/**
- * enum cpuextfeature - Test for an extended feature provided by the CPU
- *
- * This is used by cpuid_has_ext_feature()
- *
- * CEF_x64:
- * 	Test for 64-bits.
- *
- * CEF_SSE4a:
- * CEF_FMA4:
- * CEF_XOP:
- * 	Test for SSE4a/FMA4/XOP
- */
-typedef enum cpuextfeature {
-	CEF_x64 	= 1 << 29,
-	CEF_SSE4a 	= 1 << 6,
-	CEF_FMA4 	= 1 << 16,
-	CEF_XOP 	= 1 << 11
-} cpuextfeature_t;
+#define CF_MMX 		0
+#define CF_SSE 		1
+#define CF_SSE2 	2
+#define CF_SSE3 	3
+#define CF_FPU 		4
+#define CF_TSC 		5
+#define CF_MSR 		6
+#define CF_SSSE3 	7
+#define CF_AVX 		8
+#define CF_FMA 		9
+
+#define CEF_x64 	10
+#define CEF_FPU 	11
+#define CEF_DE 		12
+#define CEF_SYSCALLRET 	13
+#define CEF_CMOV 	14
+#define CEF_SSE4a 	15
+#define CEF_FMA4 	16
+#define CEF_XOP 	17
 
-/**
- * enum cputype - CPU type
- *
- * Warning, do not change this order or odd stuff may happen.
- */
 typedef enum cputype {
 	CT_NONE,
 	CT_AMDK5,
@@ -149,18 +112,20 @@ typedef enum cputype {
 } cputype_t;
 
 /**
- * get_cpu_type - Get CPU Type
+ * cpuid_get_cpu_type - Get CPU Type
  *
  * Returns the CPU Type as cputype_t.
+ *
+ * See also: cpuid_get_cpu_type_string()
  */
-cputype_t get_cpu_type(void);
+cputype_t cpuid_get_cpu_type(void);
 
 /**
- * get_cpu_type_string - Get CPU Type string
+ * cpuid_get_cpu_type_string - Get CPU Type string
  *
  * Returns the CPU type string based off cputype_t.
  */
-const char *get_cpu_type_string(const cputype_t cputype);
+const char *cpuid_get_cpu_type_string(const cputype_t cputype);
 
 /**
  * cpuid_is_supported - test if the CPUID instruction is supported
@@ -174,7 +139,7 @@ const char *get_cpu_type_string(const cputype_t cputype);
 int cpuid_is_supported(void);
 
 /**
- * highest_ext_func_supported - Get the highest extended function supported
+ * cpuid_highest_ext_func_supported - Get the highest extended function supported
  *
  *
  * Returns the highest extended function supported.
@@ -187,7 +152,7 @@ int cpuid_is_supported(void);
  *
  * See also: cpuid()
  */
-int highest_ext_func_supported(void);
+int cpuid_highest_ext_func_supported(void);
 
 /**
  * cpuid - Get Some information from the CPU.
@@ -240,34 +205,28 @@ int cpuid_test_feature(cpuid_t feature);
 /**
  * cpuid_has_feature - Test if @feature is supported
  *
- * Test if the CPU supports MMX/SSE* etc
+ * Test if the CPU supports MMX/SSE* etc.
+ * For the extended parameter, usually you want to pass it as
+ * 0 if you're not passing CEF_*.
  *
- * Returns 1 if the feature is available, 0 otherwise.
- */
-#define cpuid_has_mmx() 	cpuid_has_feature(CF_MMX)
-#define cpuid_has_sse() 	cpuid_has_feature(CF_SSE)
-#define cpuid_has_sse2() 	cpuid_has_feature(CF_SSE2)
-#define cpuid_has_sse3() 	cpuid_has_feature(CF_SSE3)
-#define cpuid_has_ssse3() 	cpuid_has_feature(CF_SSSE3)
-#define cpuid_has_sse41() 	cpuid_has_feature(CF_SSE41)
-#define cpuid_has_sse42() 	cpuid_has_feature(CF_SSE42)
-#define cpuid_has_avx() 	cpuid_has_feature(CF_AVX)
-#define cpuid_has_fma() 	cpuid_has_feature(CF_FMA)
-int cpuid_has_feature(cpufeature_t feature);
-
-/**
- * cpuid_has_ext_feature - Test if @extfeature is an extended feature
- * that's supported by the CPU.
- *
- * Test if the CPU supports this extended feature.
+ * For more information about the CPU extended features, have a look
+ * at:
+ * 	http://en.wikipedia.org/wiki/CPUID
  *
- * Returns 1 if available, 0 otherwise.
+ * Returns 1 if the feature is available, 0 otherwise.
  */
-#define cpuid_has_x64() 	cpuid_has_ext_feature(CEF_x64)
-#define cpuid_has_sse4a() 	cpuid_has_ext_feature(CEF_SSE4a)
-#define cpuid_has_fma4() 	cpuid_has_ext_feature(CEF_FMA4)
-#define cpuid_has_xop() 	cpuid_has_ext_feature(CEF_XOP)
-int cpuid_has_ext_feature(cpuextfeature_t extfeature);
+#define cpuid_has_mmx() 	cpuid_has_feature(CF_MMX, 	0)
+#define cpuid_has_sse() 	cpuid_has_feature(CF_SSE, 	0)
+#define cpuid_has_sse2() 	cpuid_has_feature(CF_SSE2, 	0)
+#define cpuid_has_sse3() 	cpuid_has_feature(CF_SSE3, 	0)
+#define cpuid_has_ssse3() 	cpuid_has_feature(CF_SSSE3, 	0)
+#define cpuid_has_avx() 	cpuid_has_feature(CF_AVX, 	0)
+#define cpuid_has_fma() 	cpuid_has_feature(CF_FMA, 	0)
+#define cpuid_has_x64() 	cpuid_has_feature(CEF_x64, 	1)
+#define cpuid_has_sse4a() 	cpuid_has_feature(CEF_SSE4a, 	1)
+#define cpuid_has_fma4() 	cpuid_has_feature(CEF_FMA4, 	1)
+#define cpuid_has_xop() 	cpuid_has_feature(CEF_XOP, 	1)
+int cpuid_has_feature(int feature, int extended);
 
 #endif