--- Libc/Libc-262/pthreads/pthread.c
+++ Libc/Libc-262.2.12/pthreads/pthread.c
@@ -38,12 +38,17 @@
 #include <sys/syscall.h>
 #include <machine/vmparam.h>
 #include <mach/vm_statistics.h>
+#define	__APPLE_API_PRIVATE
+#include <machine/cpu_capabilities.h>
 
 #include "pthread_internals.h"
 
 /* Per-thread kernel support */
 extern void _pthread_set_self(pthread_t);
 extern void mig_init(int);
+
+/* Get CPU capabilities from the kernel */
+__private_extern__ void _init_cpu_capabilities(void);
 
 /* Needed to tell the malloc subsystem we're going multithreaded */
 extern void set_malloc_singlethreaded(int);
@@ -75,9 +80,6 @@
 		tries = _spin_tries;
 	} while(!_spin_lock_try(lock));
 }
-
-/* Apparently, bcopy doesn't declare _cpu_has_altivec anymore */
-int _cpu_has_altivec = 0;
 
 extern mach_port_t thread_recycle_port;
 
@@ -1287,13 +1289,6 @@
  * Perform package initialization - called automatically when application starts
  */
 
-extern int _cpu_capabilities;
-
-#define kHasAltivec     0x01                                            
-#define kCache32                0x04                                    
-#define kUseDcba                0x20                                    
-#define kNoDcba         0x40                                            
-
 static int
 pthread_init(void)
 {
@@ -1308,11 +1303,7 @@
 	mach_msg_type_number_t count;
 	int mib[2];
 	size_t len;
-	int hasvectorunit, numcpus;
-                                                                                
-	extern  int     _bcopy_initialize(void);
-	int     dynamic_choice;
-                                                                                
+	int numcpus;
 
         count = HOST_PRIORITY_INFO_COUNT;
 	info = (host_info_t)&priority_info;
@@ -1323,8 +1314,8 @@
                 printf("host_info failed (%d); probably need privilege.\n", kr);
         else {
 		default_priority = priority_info.user_priority;
-            min_priority = priority_info.minimum_priority;
-            max_priority = priority_info.maximum_priority;
+		min_priority = priority_info.minimum_priority;
+		max_priority = priority_info.maximum_priority;
 	}
 	attrs = &_pthread_attr_default;
 	pthread_attr_init(attrs);
@@ -1352,27 +1343,26 @@
 		else {
 			if (basic_info.avail_cpus > 1)
 				_spin_tries = MP_SPIN_TRIES;
-			/* This is a crude test */
-			if (basic_info.cpu_subtype >= CPU_SUBTYPE_POWERPC_7400) 
-				_cpu_has_altivec = 1;
-		}
-	}
+		}
+	}
+
 	mach_port_deallocate(mach_task_self(), host);
-
-	mib[0] = CTL_HW;
-	mib[1] = HW_VECTORUNIT;
-	len = sizeof(hasvectorunit);
-	if (sysctl(mib, 2, &hasvectorunit, &len, NULL, 0) == 0) {
-		_cpu_has_altivec = hasvectorunit;
-	}
-	if (_cpu_has_altivec) {                                 // G4, let bcopy decide whether to use dcba                                        
-		_cpu_capabilities = kCache32 + kHasAltivec;                     
-	} else {                                                         // G3, no altivec and no dcba                                              
-		_cpu_capabilities = kCache32 + kNoDcba;                         
-	}                                                                       
-                                                                                
-	dynamic_choice = _bcopy_initialize();           // returns 0, kUseDcba, or kNoDcba                                                    
-	_cpu_capabilities |= dynamic_choice;            // remember dynamic choice, if any                                                                  
+    
+	_init_cpu_capabilities();	/* check for vector unit, cache line size etc */
+
+#if defined(__ppc__)
+	/* Use fsqrt instruction in sqrt() if available. */
+    if (_cpu_capabilities & kHasFsqrt) {
+        extern size_t hw_sqrt_len;
+        extern double sqrt( double );
+        extern double hw_sqrt( double );
+        extern void sys_icache_invalidate(void *, size_t);
+
+        memcpy ( (void *)sqrt, (void *)hw_sqrt, hw_sqrt_len );
+        sys_icache_invalidate((void *)sqrt, hw_sqrt_len);
+    }
+#endif
+    
 	mig_init(1);		/* enable multi-threaded mig interfaces */
 	return 0;
 }