/*
- * Copyright (C) 2007-2014 Free Software Foundation, Inc.
+ * Copyright (C) 2007-2020 Free Software Foundation, Inc.
*
* This file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* <http://www.gnu.org/licenses/>.
*/
+/* %eax */
+#define bit_AVX512BF16 (1 << 5)
+
/* %ecx */
#define bit_SSE3 (1 << 0)
#define bit_PCLMUL (1 << 1)
#define bit_SSE (1 << 25)
#define bit_SSE2 (1 << 26)
-/* Extended Features */
+/* Extended Features (%eax == 0x80000001) */
/* %ecx */
#define bit_LAHF_LM (1 << 0)
#define bit_ABM (1 << 5)
#define bit_LWP (1 << 15)
#define bit_FMA4 (1 << 16)
#define bit_TBM (1 << 21)
+#define bit_MWAITX (1 << 29)
/* %edx */
#define bit_MMXEXT (1 << 22)
#define bit_LM (1 << 29)
#define bit_3DNOWP (1 << 30)
-#define bit_3DNOW (1 << 31)
+#define bit_3DNOW (1u << 31)
+
+/* %ebx */
+#define bit_CLZERO (1 << 0)
+#define bit_WBNOINVD (1 << 9)
/* Extended Features (%eax == 7) */
/* %ebx */
#define bit_FSGSBASE (1 << 0)
+#define bit_SGX (1 << 2)
#define bit_BMI (1 << 3)
#define bit_HLE (1 << 4)
#define bit_AVX2 (1 << 5)
#define bit_RDSEED (1 << 18)
#define bit_ADX (1 << 19)
#define bit_AVX512IFMA (1 << 21)
-#define bit_PCOMMIT (1 << 22)
#define bit_CLFLUSHOPT (1 << 23)
#define bit_CLWB (1 << 24)
#define bit_AVX512PF (1 << 26)
#define bit_AVX512CD (1 << 28)
#define bit_SHA (1 << 29)
#define bit_AVX512BW (1 << 30)
-#define bit_AVX512VL (1 << 31)
+#define bit_AVX512VL (1u << 31)
/* %ecx */
#define bit_PREFETCHWT1 (1 << 0)
#define bit_AVX512VBMI (1 << 1)
+#define bit_PKU (1 << 3)
+#define bit_OSPKE (1 << 4)
+#define bit_WAITPKG (1 << 5)
+#define bit_AVX512VBMI2 (1 << 6)
+#define bit_SHSTK (1 << 7)
+#define bit_GFNI (1 << 8)
+#define bit_VAES (1 << 9)
+#define bit_AVX512VNNI (1 << 11)
+#define bit_VPCLMULQDQ (1 << 10)
+#define bit_AVX512BITALG (1 << 12)
+#define bit_AVX512VPOPCNTDQ (1 << 14)
+#define bit_RDPID (1 << 22)
+#define bit_MOVDIRI (1 << 27)
+#define bit_MOVDIR64B (1 << 28)
+#define bit_ENQCMD (1 << 29)
+#define bit_CLDEMOTE (1 << 25)
+/* %edx */
+#define bit_AVX5124VNNIW (1 << 2)
+#define bit_AVX5124FMAPS (1 << 3)
+#define bit_AVX512VP2INTERSECT (1 << 8)
+#define bit_IBT (1 << 20)
+#define bit_PCONFIG (1 << 18)
/* XFEATURE_ENABLED_MASK register bits (%eax == 13, %ecx == 0) */
#define bit_BNDREGS (1 << 3)
#define bit_BNDCSR (1 << 4)
#define bit_XSAVEC (1 << 1)
#define bit_XSAVES (1 << 3)
+/* PT sub leaf (%eax == 14, %ecx == 0) */
+/* %ebx */
+#define bit_PTWRITE (1 << 4)
+
/* Signatures for different CPU implementations as returned in uses
of cpuid with level 0. */
#define signature_AMD_ebx 0x68747541
#define signature_VORTEX_ecx 0x436f5320
#define signature_VORTEX_edx 0x36387865
+#ifndef __x86_64__
+/* At least one cpu (Winchip 2) does not set %ebx and %ecx
+ for cpuid leaf 1. Forcibly zero the two registers before
+ calling cpuid as a precaution. */
+#define __cpuid(level, a, b, c, d) \
+ do { \
+ if (__builtin_constant_p (level) && (level) != 1) \
+ __asm__ ("cpuid\n\t" \
+ : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
+ : "0" (level)); \
+ else \
+ __asm__ ("cpuid\n\t" \
+ : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
+ : "0" (level), "1" (0), "2" (0)); \
+ } while (0)
+#else
#define __cpuid(level, a, b, c, d) \
__asm__ ("cpuid\n\t" \
: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
: "0" (level))
+#endif
#define __cpuid_count(level, count, a, b, c, d) \
__asm__ ("cpuid\n\t" \
/* Return highest supported input value for cpuid instruction. ext can
- be either 0x0 or 0x8000000 to return highest supported value for
+ be either 0x0 or 0x80000000 to return highest supported value for
basic or extended cpuid information. Function returns 0 if cpuid
is not supported or whatever cpuid returns in eax register. If sig
pointer is non-null, then first four bytes of the signature
return __eax;
}
-/* Return cpuid data for requested cpuid level, as found in returned
+/* Return cpuid data for requested cpuid leaf, as found in returned
eax, ebx, ecx and edx registers. The function checks if cpuid is
supported and returns 1 for valid cpuid information or 0 for
- unsupported cpuid level. All pointers are required to be non-null. */
+ unsupported cpuid leaf. All pointers are required to be non-null. */
static __inline int
-__get_cpuid (unsigned int __level,
+__get_cpuid (unsigned int __leaf,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
- unsigned int __ext = __level & 0x80000000;
+ unsigned int __ext = __leaf & 0x80000000;
+ unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
+
+ if (__maxlevel == 0 || __maxlevel < __leaf)
+ return 0;
+
+ __cpuid (__leaf, *__eax, *__ebx, *__ecx, *__edx);
+ return 1;
+}
+
+/* Same as above, but sub-leaf can be specified. */
+
+static __inline int
+__get_cpuid_count (unsigned int __leaf, unsigned int __subleaf,
+ unsigned int *__eax, unsigned int *__ebx,
+ unsigned int *__ecx, unsigned int *__edx)
+{
+ unsigned int __ext = __leaf & 0x80000000;
+ unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
- if (__get_cpuid_max (__ext, 0) < __level)
+ if (__maxlevel == 0 || __maxlevel < __leaf)
return 0;
- __cpuid (__level, *__eax, *__ebx, *__ecx, *__edx);
+ __cpuid_count (__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
return 1;
}