On Tuesday 05 March 2002 17:55, [EMAIL PROTECTED] wrote: > Hello, > > I was just wondering if there is any existing code that's perhaps part of > the Cygwin "code base" or else known to some readers, that will allow > querying of the CPU type? > > I'd like to have a pretty simple way to get this. One application would be > an enhanced "configure" for zlib-1.1.3 which would place the appropriate > assembler source for a 486, a 586 or a 686 -- for example -- into the > Makefile build formulae. I need only the "generation" of chip, i.e. what > Intel calls the "Family." > > I am thinking that maybe somebody already worked this out. I am also > thinking that instead, maybe the way this is done is in assembler and if so > maybe it hasn't been done (specific to Cygwin, that is; I have found a > couple of free utilities out there that do this from a command line). I am > just full of semi-educated guesses ;-). >
It's not OS-specific. Any gcc code which does what you want should work, or you could translate MS-style asm() syntax, as I did here: #include <windows.h> #define FAMILY_ID 0x0f00 // EAX[11:8] - Bit 11 thru 8 contains family unsigned int reg_eax = 0; unsigned int reg_edx = 0; unsigned int junk, junk1; unsigned int vendor_id[3] = {0, 0, 0}; __try { // verify cpuid instruction is supported __asm__("cpuid" : "=a" (reg_eax), "=b" (*vendor_id), "=c" (vendor_id[2]), "=d" (vendor_id[1]) : "a" (0)); __asm__("cpuid" : "=a" (reg_eax), "=b"(junk), "=c"(junk1), "=d" (reg_edx) : "a" (1)); // eax contains cpu family type info // edx has info whether Hyper-Threading // Technology is available } __except (EXCEPTION_EXECUTE_HANDLER ) { return NO_CPUID; // CPUID is not supported and so // it is not a recent family CPU } return (reg_eax & FAMILY_ID); > > Regards, > Soren Andersen -- Tim Prince -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/