[PATCH v2 4/4] ntdll: Avoid inline assembly in have_cpuid().
Zebediah Figura
z.figura12 at gmail.com
Sun Nov 25 22:31:52 CST 2018
Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
---
dlls/ntdll/nt.c | 42 ++++++++++++++++++++++--------------------
1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index a3aa6358a6..eaff8df8bf 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -978,30 +978,32 @@ void do_cpuid(unsigned int ax, unsigned int *p)
}
#endif
-/* From xf86info havecpuid.c 1.11 */
-static inline BOOL have_cpuid(void)
-{
+extern int have_cpuid(void);
+
#ifdef __i386__
- unsigned int f1, f2;
- __asm__("pushfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "movl %0,%1\n\t"
- "xorl %2,%0\n\t"
- "pushl %0\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "popfl"
- : "=&r" (f1), "=&r" (f2)
- : "ir" (0x00200000));
- return ((f1^f2) & 0x00200000) != 0;
+__ASM_GLOBAL_FUNC( have_cpuid,
+ "pushfl\n\t"
+ "pushfl\n\t"
+ "movl (%esp),%ecx\n\t"
+ "xorl $0x00200000,(%esp)\n\t"
+ "popfl\n\t"
+ "pushfl\n\t"
+ "popl %eax\n\t"
+ "popfl\n\t"
+ "xorl %ecx,%eax\n\t"
+ "andl $0x00200000,%eax\n\t"
+ "ret" );
#elif defined(__x86_64__)
- return TRUE;
+int have_cpuid(void)
+{
+ return 1;
+}
#else
- return FALSE;
-#endif
+int have_cpuid(void)
+{
+ return 0;
}
+#endif
/* Detect if a SSE2 processor is capable of Denormals Are Zero (DAZ) mode.
*
--
2.14.1
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