gcc/config/i386/cpuid.h - gcc - Git at Google

 /*
  * Copyright (C) 2007-2021 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
  * Free Software Foundation; either version 3, or (at your option) any
  * later version.
  *
  * This file is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * Under Section 7 of GPL version 3, you are granted additional
  * permissions described in the GCC Runtime Library Exception, version
  * 3.1, as published by the Free Software Foundation.
  *
  * You should have received a copy of the GNU General Public License and
  * a copy of the GCC Runtime Library Exception along with this program;
  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  * <http://www.gnu.org/licenses/>.
  */

 #ifndef _CPUID_H_INCLUDED
 #define _CPUID_H_INCLUDED

 /* %eax */
 #define bit_AVXVNNI	(1 << 4)
 #define bit_AVX512BF16	(1 << 5)
 #define bit_HRESET	(1 << 22)

 /* %ecx */
 #define bit_SSE3	(1 << 0)
 #define bit_PCLMUL	(1 << 1)
 #define bit_LZCNT	(1 << 5)
 #define bit_SSSE3	(1 << 9)
 #define bit_FMA		(1 << 12)
 #define bit_CMPXCHG16B	(1 << 13)
 #define bit_SSE4_1	(1 << 19)
 #define bit_SSE4_2	(1 << 20)
 #define bit_MOVBE	(1 << 22)
 #define bit_POPCNT	(1 << 23)
 #define bit_AES		(1 << 25)
 #define bit_XSAVE	(1 << 26)
 #define bit_OSXSAVE	(1 << 27)
 #define bit_AVX		(1 << 28)
 #define bit_F16C	(1 << 29)
 #define bit_RDRND	(1 << 30)

 /* %edx */
 #define bit_CMPXCHG8B	(1 << 8)
 #define bit_CMOV	(1 << 15)
 #define bit_MMX		(1 << 23)
 #define bit_FXSAVE	(1 << 24)
 #define bit_SSE		(1 << 25)
 #define bit_SSE2	(1 << 26)

 /* Extended Features (%eax == 0x80000001) */
 /* %ecx */
 #define bit_LAHF_LM	(1 << 0)
 #define bit_ABM		(1 << 5)
 #define bit_SSE4a	(1 << 6)
 #define bit_PRFCHW	(1 << 8)
 #define bit_XOP         (1 << 11)
 #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	(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_BMI2	(1 << 8)
 #define bit_RTM	(1 << 11)
 #define bit_MPX	(1 << 14)
 #define bit_AVX512F	(1 << 16)
 #define bit_AVX512DQ	(1 << 17)
 #define bit_RDSEED	(1 << 18)
 #define bit_ADX	(1 << 19)
 #define bit_AVX512IFMA	(1 << 21)
 #define bit_CLFLUSHOPT	(1 << 23)
 #define bit_CLWB	(1 << 24)
 #define bit_AVX512PF	(1 << 26)
 #define bit_AVX512ER	(1 << 27)
 #define bit_AVX512CD	(1 << 28)
 #define bit_SHA		(1 << 29)
 #define bit_AVX512BW	(1 << 30)
 #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)
 #define bit_KL		(1 << 23)

 /* %edx */
 #define bit_AVX5124VNNIW (1 << 2)
 #define bit_AVX5124FMAPS (1 << 3)
 #define bit_AVX512VP2INTERSECT	(1 << 8)
 #define bit_AVX512FP16   (1 << 23)
 #define bit_IBT	(1 << 20)
 #define bit_UINTR (1 << 5)
 #define bit_PCONFIG	(1 << 18)
 #define bit_SERIALIZE	(1 << 14)
 #define bit_TSXLDTRK    (1 << 16)
 #define bit_AMX_BF16    (1 << 22)
 #define bit_AMX_TILE    (1 << 24)
 #define bit_AMX_INT8    (1 << 25)

 /* XFEATURE_ENABLED_MASK register bits (%eax == 0xd, %ecx == 0) */
 #define bit_BNDREGS     (1 << 3)
 #define bit_BNDCSR      (1 << 4)

 /* Extended State Enumeration Sub-leaf (%eax == 0xd, %ecx == 1) */
 #define bit_XSAVEOPT	(1 << 0)
 #define bit_XSAVEC	(1 << 1)
 #define bit_XSAVES	(1 << 3)

 /* PT sub leaf (%eax == 0x14, %ecx == 0) */
 /* %ebx */
 #define bit_PTWRITE	(1 << 4)

 /* Keylocker leaf (%eax == 0x19) */
 /* %ebx */
 #define bit_AESKLE	( 1<<0 )
 #define bit_WIDEKL	( 1<<2 )


 /* Signatures for different CPU implementations as returned in uses
    of cpuid with level 0.  */
 #define signature_AMD_ebx	0x68747541
 #define signature_AMD_ecx	0x444d4163
 #define signature_AMD_edx	0x69746e65

 #define signature_CENTAUR_ebx	0x746e6543
 #define signature_CENTAUR_ecx	0x736c7561
 #define signature_CENTAUR_edx	0x48727561

 #define signature_CYRIX_ebx	0x69727943
 #define signature_CYRIX_ecx	0x64616574
 #define signature_CYRIX_edx	0x736e4978

 #define signature_INTEL_ebx	0x756e6547
 #define signature_INTEL_ecx	0x6c65746e
 #define signature_INTEL_edx	0x49656e69

 #define signature_TM1_ebx	0x6e617254
 #define signature_TM1_ecx	0x55504361
 #define signature_TM1_edx	0x74656d73

 #define signature_TM2_ebx	0x756e6547
 #define signature_TM2_ecx	0x3638784d
 #define signature_TM2_edx	0x54656e69

 #define signature_NSC_ebx	0x646f6547
 #define signature_NSC_ecx	0x43534e20
 #define signature_NSC_edx	0x79622065

 #define signature_NEXGEN_ebx	0x4778654e
 #define signature_NEXGEN_ecx	0x6e657669
 #define signature_NEXGEN_edx	0x72446e65

 #define signature_RISE_ebx	0x65736952
 #define signature_RISE_ecx	0x65736952
 #define signature_RISE_edx	0x65736952

 #define signature_SIS_ebx	0x20536953
 #define signature_SIS_ecx	0x20536953
 #define signature_SIS_edx	0x20536953

 #define signature_UMC_ebx	0x20434d55
 #define signature_UMC_ecx	0x20434d55
 #define signature_UMC_edx	0x20434d55

 #define signature_VIA_ebx	0x20414956
 #define signature_VIA_ecx	0x20414956
 #define signature_VIA_edx	0x20414956

 #define signature_VORTEX_ebx	0x74726f56
 #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__ __volatile__ ("cpuid\n\t"					\
 			    : "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
 			    : "0" (level));				\
     else								\
       __asm__ __volatile__ ("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__ __volatile__ ("cpuid\n\t"					\
 			: "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
 			: "0" (level))
 #endif

 #define __cpuid_count(level, count, a, b, c, d)				\
   __asm__ __volatile__ ("cpuid\n\t"					\
 			: "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
 			: "0" (level), "2" (count))


 /* Return highest supported input value for cpuid instruction.  ext can
    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
    (as found in ebx register) are returned in location pointed by sig.  */

 static __inline unsigned int
 __get_cpuid_max (unsigned int __ext, unsigned int *__sig)
 {
   unsigned int __eax, __ebx, __ecx, __edx;

 #ifndef __x86_64__
   /* See if we can use cpuid.  On AMD64 we always can.  */
 #if __GNUC__ >= 3
   __asm__ ("pushf{l|d}\n\t"
 	   "pushf{l|d}\n\t"
 	   "pop{l}\t%0\n\t"
 	   "mov{l}\t{%0, %1|%1, %0}\n\t"
 	   "xor{l}\t{%2, %0|%0, %2}\n\t"
 	   "push{l}\t%0\n\t"
 	   "popf{l|d}\n\t"
 	   "pushf{l|d}\n\t"
 	   "pop{l}\t%0\n\t"
 	   "popf{l|d}\n\t"
 	   : "=&r" (__eax), "=&r" (__ebx)
 	   : "i" (0x00200000));
 #else
 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
    nor alternatives in i386 code.  */
   __asm__ ("pushfl\n\t"
 	   "pushfl\n\t"
 	   "popl\t%0\n\t"
 	   "movl\t%0, %1\n\t"
 	   "xorl\t%2, %0\n\t"
 	   "pushl\t%0\n\t"
 	   "popfl\n\t"
 	   "pushfl\n\t"
 	   "popl\t%0\n\t"
 	   "popfl\n\t"
 	   : "=&r" (__eax), "=&r" (__ebx)
 	   : "i" (0x00200000));
 #endif

   if (!((__eax ^ __ebx) & 0x00200000))
     return 0;
 #endif

   /* Host supports cpuid.  Return highest supported cpuid input value.  */
   __cpuid (__ext, __eax, __ebx, __ecx, __edx);

   if (__sig)
     *__sig = __ebx;

   return __eax;
 }

 /* 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 leaf.  All pointers are required to be non-null.  */

 static __inline int
 __get_cpuid (unsigned int __leaf,
 	     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 (__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 (__maxlevel == 0 || __maxlevel < __leaf)
     return 0;

   __cpuid_count (__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
   return 1;
 }

 static __inline void
 __cpuidex (int __cpuid_info[4], int __leaf, int __subleaf)
 {
   __cpuid_count (__leaf, __subleaf, __cpuid_info[0], __cpuid_info[1],
 		 __cpuid_info[2], __cpuid_info[3]);
 }

 #endif /* _CPUID_H_INCLUDED */
	/*
	* Copyright (C) 2007-2021 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
	* Free Software Foundation; either version 3, or (at your option) any
	* later version.
	*
	* This file is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* Under Section 7 of GPL version 3, you are granted additional
	* permissions described in the GCC Runtime Library Exception, version
	* 3.1, as published by the Free Software Foundation.
	*
	* You should have received a copy of the GNU General Public License and
	* a copy of the GCC Runtime Library Exception along with this program;
	* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	* <http://www.gnu.org/licenses/>.
	*/

	#ifndef _CPUID_H_INCLUDED
	#define _CPUID_H_INCLUDED

	/* %eax */
	#define bit_AVXVNNI (1 << 4)
	#define bit_AVX512BF16 (1 << 5)
	#define bit_HRESET (1 << 22)

	/* %ecx */
	#define bit_SSE3 (1 << 0)
	#define bit_PCLMUL (1 << 1)
	#define bit_LZCNT (1 << 5)
	#define bit_SSSE3 (1 << 9)
	#define bit_FMA (1 << 12)
	#define bit_CMPXCHG16B (1 << 13)
	#define bit_SSE4_1 (1 << 19)
	#define bit_SSE4_2 (1 << 20)
	#define bit_MOVBE (1 << 22)
	#define bit_POPCNT (1 << 23)
	#define bit_AES (1 << 25)
	#define bit_XSAVE (1 << 26)
	#define bit_OSXSAVE (1 << 27)
	#define bit_AVX (1 << 28)
	#define bit_F16C (1 << 29)
	#define bit_RDRND (1 << 30)

	/* %edx */
	#define bit_CMPXCHG8B (1 << 8)
	#define bit_CMOV (1 << 15)
	#define bit_MMX (1 << 23)
	#define bit_FXSAVE (1 << 24)
	#define bit_SSE (1 << 25)
	#define bit_SSE2 (1 << 26)

	/* Extended Features (%eax == 0x80000001) */
	/* %ecx */
	#define bit_LAHF_LM (1 << 0)
	#define bit_ABM (1 << 5)
	#define bit_SSE4a (1 << 6)
	#define bit_PRFCHW (1 << 8)
	#define bit_XOP (1 << 11)
	#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 (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_BMI2 (1 << 8)
	#define bit_RTM (1 << 11)
	#define bit_MPX (1 << 14)
	#define bit_AVX512F (1 << 16)
	#define bit_AVX512DQ (1 << 17)
	#define bit_RDSEED (1 << 18)
	#define bit_ADX (1 << 19)
	#define bit_AVX512IFMA (1 << 21)
	#define bit_CLFLUSHOPT (1 << 23)
	#define bit_CLWB (1 << 24)
	#define bit_AVX512PF (1 << 26)
	#define bit_AVX512ER (1 << 27)
	#define bit_AVX512CD (1 << 28)
	#define bit_SHA (1 << 29)
	#define bit_AVX512BW (1 << 30)
	#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)
	#define bit_KL (1 << 23)

	/* %edx */
	#define bit_AVX5124VNNIW (1 << 2)
	#define bit_AVX5124FMAPS (1 << 3)
	#define bit_AVX512VP2INTERSECT (1 << 8)
	#define bit_AVX512FP16 (1 << 23)
	#define bit_IBT (1 << 20)
	#define bit_UINTR (1 << 5)
	#define bit_PCONFIG (1 << 18)
	#define bit_SERIALIZE (1 << 14)
	#define bit_TSXLDTRK (1 << 16)
	#define bit_AMX_BF16 (1 << 22)
	#define bit_AMX_TILE (1 << 24)
	#define bit_AMX_INT8 (1 << 25)

	/* XFEATURE_ENABLED_MASK register bits (%eax == 0xd, %ecx == 0) */
	#define bit_BNDREGS (1 << 3)
	#define bit_BNDCSR (1 << 4)

	/* Extended State Enumeration Sub-leaf (%eax == 0xd, %ecx == 1) */
	#define bit_XSAVEOPT (1 << 0)
	#define bit_XSAVEC (1 << 1)
	#define bit_XSAVES (1 << 3)

	/* PT sub leaf (%eax == 0x14, %ecx == 0) */
	/* %ebx */
	#define bit_PTWRITE (1 << 4)

	/* Keylocker leaf (%eax == 0x19) */
	/* %ebx */
	#define bit_AESKLE ( 1<<0 )
	#define bit_WIDEKL ( 1<<2 )


	/* Signatures for different CPU implementations as returned in uses
	of cpuid with level 0. */
	#define signature_AMD_ebx 0x68747541
	#define signature_AMD_ecx 0x444d4163
	#define signature_AMD_edx 0x69746e65

	#define signature_CENTAUR_ebx 0x746e6543
	#define signature_CENTAUR_ecx 0x736c7561
	#define signature_CENTAUR_edx 0x48727561

	#define signature_CYRIX_ebx 0x69727943
	#define signature_CYRIX_ecx 0x64616574
	#define signature_CYRIX_edx 0x736e4978

	#define signature_INTEL_ebx 0x756e6547
	#define signature_INTEL_ecx 0x6c65746e
	#define signature_INTEL_edx 0x49656e69

	#define signature_TM1_ebx 0x6e617254
	#define signature_TM1_ecx 0x55504361
	#define signature_TM1_edx 0x74656d73

	#define signature_TM2_ebx 0x756e6547
	#define signature_TM2_ecx 0x3638784d
	#define signature_TM2_edx 0x54656e69

	#define signature_NSC_ebx 0x646f6547
	#define signature_NSC_ecx 0x43534e20
	#define signature_NSC_edx 0x79622065

	#define signature_NEXGEN_ebx 0x4778654e
	#define signature_NEXGEN_ecx 0x6e657669
	#define signature_NEXGEN_edx 0x72446e65

	#define signature_RISE_ebx 0x65736952
	#define signature_RISE_ecx 0x65736952
	#define signature_RISE_edx 0x65736952

	#define signature_SIS_ebx 0x20536953
	#define signature_SIS_ecx 0x20536953
	#define signature_SIS_edx 0x20536953

	#define signature_UMC_ebx 0x20434d55
	#define signature_UMC_ecx 0x20434d55
	#define signature_UMC_edx 0x20434d55

	#define signature_VIA_ebx 0x20414956
	#define signature_VIA_ecx 0x20414956
	#define signature_VIA_edx 0x20414956

	#define signature_VORTEX_ebx 0x74726f56
	#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__ __volatile__ ("cpuid\n\t" \
	: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
	: "0" (level)); \
	else \
	__asm__ __volatile__ ("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__ __volatile__ ("cpuid\n\t" \
	: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
	: "0" (level))
	#endif

	#define __cpuid_count(level, count, a, b, c, d) \
	__asm__ __volatile__ ("cpuid\n\t" \
	: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
	: "0" (level), "2" (count))


	/* Return highest supported input value for cpuid instruction. ext can
	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
	(as found in ebx register) are returned in location pointed by sig. */

	static __inline unsigned int
	__get_cpuid_max (unsigned int __ext, unsigned int *__sig)
	{
	unsigned int __eax, __ebx, __ecx, __edx;

	#ifndef __x86_64__
	/* See if we can use cpuid. On AMD64 we always can. */
	#if __GNUC__ >= 3
	__asm__ ("pushf{l\|d}\n\t"
	"pushf{l\|d}\n\t"
	"pop{l}\t%0\n\t"
	"mov{l}\t{%0, %1\|%1, %0}\n\t"
	"xor{l}\t{%2, %0\|%0, %2}\n\t"
	"push{l}\t%0\n\t"
	"popf{l\|d}\n\t"
	"pushf{l\|d}\n\t"
	"pop{l}\t%0\n\t"
	"popf{l\|d}\n\t"
	: "=&r" (__eax), "=&r" (__ebx)
	: "i" (0x00200000));
	#else
	/* Host GCCs older than 3.0 weren't supporting Intel asm syntax
	nor alternatives in i386 code. */
	__asm__ ("pushfl\n\t"
	"pushfl\n\t"
	"popl\t%0\n\t"
	"movl\t%0, %1\n\t"
	"xorl\t%2, %0\n\t"
	"pushl\t%0\n\t"
	"popfl\n\t"
	"pushfl\n\t"
	"popl\t%0\n\t"
	"popfl\n\t"
	: "=&r" (__eax), "=&r" (__ebx)
	: "i" (0x00200000));
	#endif

	if (!((__eax ^ __ebx) & 0x00200000))
	return 0;
	#endif

	/* Host supports cpuid. Return highest supported cpuid input value. */
	__cpuid (__ext, __eax, __ebx, __ecx, __edx);

	if (__sig)
	*__sig = __ebx;

	return __eax;
	}

	/* 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 leaf. All pointers are required to be non-null. */

	static __inline int
	__get_cpuid (unsigned int __leaf,
	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 (__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 (__maxlevel == 0 \|\| __maxlevel < __leaf)
	return 0;

	__cpuid_count (__leaf, __subleaf, __eax, __ebx, __ecx, __edx);
	return 1;
	}

	static __inline void
	__cpuidex (int __cpuid_info[4], int __leaf, int __subleaf)
	{
	__cpuid_count (__leaf, __subleaf, __cpuid_info[0], __cpuid_info[1],
	__cpuid_info[2], __cpuid_info[3]);
	}

	#endif /* _CPUID_H_INCLUDED */