--- Gnu-Mach/linux/src/include/asm-i386/bitops.h	2020/09/02 04:41:39	1.1
+++ Gnu-Mach/linux/src/include/asm-i386/bitops.h	2020/09/02 04:46:05	1.1.1.2
@@ -61,6 +61,40 @@ extern __inline__ int change_bit(int nr,
 	return oldbit;
 }
 
+extern __inline__ int test_and_set_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btsl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),"=m" (ADDR)
+		:"Ir" (nr));
+	return oldbit;
+}
+
+extern __inline__ int test_and_clear_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btrl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),"=m" (ADDR)
+		:"Ir" (nr));
+	return oldbit;
+}
+
+extern __inline__ int test_and_change_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btcl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),"=m" (ADDR)
+		:"Ir" (nr));
+	return oldbit;
+}
+
+
 /*
  * This routine doesn't need to be atomic.
  */
@@ -134,4 +168,34 @@ extern __inline__ unsigned long ffz(unsi
 	return word;
 }
 
+#ifdef __KERNEL__
+
+/*
+ * ffs: find first bit set. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+
+extern __inline__ int ffs(int x)
+{
+	int r;
+
+	__asm__("bsfl %1,%0\n\t"
+		"jnz 1f\n\t"
+		"movl $-1,%0\n"
+		"1:" : "=r" (r) : "g" (x));
+	return r+1;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+#endif /* __KERNEL__ */
+
 #endif /* _I386_BITOPS_H */