From 4dcb5dbb53ea4fbeab48bc6bc3c4d392361dabc1 Mon Sep 17 00:00:00 2001 From: Roman Divacky Date: Fri, 19 Jul 2013 17:28:36 +0000 Subject: [PATCH] This patch implements __get_cpuid_max() as an inline and __cpuid() and __cpuid_count() as macros to be compatible with GCC's cpuid.h. It also adds bit_ constants for the various feature bits as described in version 039 (May 2011) of Intel's SDM Volume 2 in the description of the CPUID instruction. The list of bit_ constants is a bit exhaustive (GCC doesn't do near this many). More bits could be added from a newer version of SDM if desired. Patch by John Baldwin! llvm-svn: 186696 --- clang/lib/Headers/cpuid.h | 126 +++++++++++++++++++++++++++++++++++++- 1 file changed, 124 insertions(+), 2 deletions(-) diff --git a/clang/lib/Headers/cpuid.h b/clang/lib/Headers/cpuid.h index 7b012384a2aa..8f12caeb4978 100644 --- a/clang/lib/Headers/cpuid.h +++ b/clang/lib/Headers/cpuid.h @@ -25,10 +25,132 @@ #error this header is for x86 only #endif +/* Features in %ecx for level 1 */ +#define bit_SSE3 0x00000001 +#define bit_PCLMULQDQ 0x00000002 +#define bit_DTES64 0x00000004 +#define bit_MONITOR 0x00000008 +#define bit_DSCPL 0x00000010 +#define bit_VMX 0x00000020 +#define bit_SMX 0x00000040 +#define bit_EIST 0x00000080 +#define bit_TM2 0x00000100 +#define bit_SSSE3 0x00000200 +#define bit_CNXTID 0x00000400 +#define bit_FMA 0x00001000 +#define bit_CMPXCHG16B 0x00002000 +#define bit_xTPR 0x00004000 +#define bit_PDCM 0x00008000 +#define bit_PCID 0x00020000 +#define bit_DCA 0x00040000 +#define bit_SSE41 0x00080000 +#define bit_SSE42 0x00100000 +#define bit_x2APIC 0x00200000 +#define bit_MOVBE 0x00400000 +#define bit_POPCNT 0x00800000 +#define bit_TSCDeadline 0x01000000 +#define bit_AESNI 0x02000000 +#define bit_XSAVE 0x04000000 +#define bit_OSXSAVE 0x08000000 +#define bit_AVX 0x10000000 +#define bit_RDRAND 0x40000000 + +/* Features in %edx for level 1 */ +#define bit_FPU 0x00000001 +#define bit_VME 0x00000002 +#define bit_DE 0x00000004 +#define bit_PSE 0x00000008 +#define bit_TSC 0x00000010 +#define bit_MSR 0x00000020 +#define bit_PAE 0x00000040 +#define bit_MCE 0x00000080 +#define bit_CX8 0x00000100 +#define bit_APIC 0x00000200 +#define bit_SEP 0x00000800 +#define bit_MTRR 0x00001000 +#define bit_PGE 0x00002000 +#define bit_MCA 0x00004000 +#define bit_CMOV 0x00008000 +#define bit_PAT 0x00010000 +#define bit_PSE36 0x00020000 +#define bit_PSN 0x00040000 +#define bit_CLFSH 0x00080000 +#define bit_DS 0x00200000 +#define bit_ACPI 0x00400000 +#define bit_MMX 0x00800000 +#define bit_FXSR 0x01000000 +#define bit_SSE 0x02000000 +#define bit_SSE2 0x04000000 +#define bit_SS 0x08000000 +#define bit_HTT 0x10000000 +#define bit_TM 0x20000000 +#define bit_PBE 0x80000000 + +/* Features in %ebx for level 7 sub-leaf 0 */ +#define bit_FSGSBASE 0x00000001 +#define bit_SMEP 0x00000080 +#define bit_ENH_MOVSB 0x00000200 + +/* PIC on i386 uses %ebx, so preserve it. */ +#if __i386__ +#define __cpuid(__level, __eax, __ebx, __ecx, __edx) \ + __asm(" pushl %%ebx\n" \ + " cpuid\n" \ + " mov %%ebx,%1\n" \ + " popl %%ebx" \ + : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ + : "0"(__level)) + +#define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \ + __asm(" pushl %%ebx\n" \ + " cpuid\n" \ + " mov %%ebx,%1\n" \ + " popl %%ebx" \ + : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ + : "0"(__level), "2"(__count)) +#else +#define __cpuid(__level, __eax, __ebx, __ecx, __edx) \ + __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ + : "0"(__level)) + +#define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \ + __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ + : "0"(__level), "2"(__count)) +#endif + static __inline int __get_cpuid (unsigned int __level, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx) { - __asm("cpuid" : "=a"(*__eax), "=b" (*__ebx), "=c"(*__ecx), "=d"(*__edx) - : "0"(__level)); + __cpuid(__level, *__eax, *__ebx, *__ecx, *__edx); return 1; } + +static __inline int __get_cpuid_max (unsigned int __level, unsigned int *__sig) +{ + unsigned int __eax, __ebx, __ecx, __edx; +#if __i386__ + int __cpuid_supported; + + __asm(" pushfl\n" + " popl %%eax\n" + " movl %%eax,%%ecx\n" + " xorl $0x00200000,%%eax\n" + " pushl %%eax\n" + " popfl\n" + " pushfl\n" + " popl %%eax\n" + " movl $0,%0\n" + " cmpl %%eax,%%ecx\n" + " je 1f\n" + " movl $1,%0\n" + "1:" + : "=r" (__cpuid_supported) : : "eax", "ecx"); + if (!__cpuid_supported) + return 0; +#endif + + __cpuid(__level, __eax, __ebx, __ecx, __edx); + if (__sig) + *__sig = __ebx; + return __eax; +}