aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/lib
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/lib')
-rw-r--r--arch/x86/lib/Makefile2
-rw-r--r--arch/x86/lib/bitops_32.c70
-rw-r--r--arch/x86/lib/bitops_64.c68
3 files changed, 1 insertions, 139 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 25df1c1989fe..436093299bd3 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -11,7 +11,7 @@ lib-y += memcpy_$(BITS).o
11ifeq ($(CONFIG_X86_32),y) 11ifeq ($(CONFIG_X86_32),y)
12 lib-y += checksum_32.o 12 lib-y += checksum_32.o
13 lib-y += strstr_32.o 13 lib-y += strstr_32.o
14 lib-y += bitops_32.o semaphore_32.o string_32.o 14 lib-y += semaphore_32.o string_32.o
15 15
16 lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o 16 lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o
17else 17else
diff --git a/arch/x86/lib/bitops_32.c b/arch/x86/lib/bitops_32.c
deleted file mode 100644
index b65440459859..000000000000
--- a/arch/x86/lib/bitops_32.c
+++ /dev/null
@@ -1,70 +0,0 @@
1#include <linux/bitops.h>
2#include <linux/module.h>
3
4/**
5 * find_next_bit - find the next set bit in a memory region
6 * @addr: The address to base the search on
7 * @offset: The bitnumber to start searching at
8 * @size: The maximum size to search
9 */
10int find_next_bit(const unsigned long *addr, int size, int offset)
11{
12 const unsigned long *p = addr + (offset >> 5);
13 int set = 0, bit = offset & 31, res;
14
15 if (bit) {
16 /*
17 * Look for nonzero in the first 32 bits:
18 */
19 __asm__("bsfl %1,%0\n\t"
20 "jne 1f\n\t"
21 "movl $32, %0\n"
22 "1:"
23 : "=r" (set)
24 : "r" (*p >> bit));
25 if (set < (32 - bit))
26 return set + offset;
27 set = 32 - bit;
28 p++;
29 }
30 /*
31 * No set bit yet, search remaining full words for a bit
32 */
33 res = find_first_bit (p, size - 32 * (p - addr));
34 return (offset + set + res);
35}
36EXPORT_SYMBOL(find_next_bit);
37
38/**
39 * find_next_zero_bit - find the first zero bit in a memory region
40 * @addr: The address to base the search on
41 * @offset: The bitnumber to start searching at
42 * @size: The maximum size to search
43 */
44int find_next_zero_bit(const unsigned long *addr, int size, int offset)
45{
46 const unsigned long *p = addr + (offset >> 5);
47 int set = 0, bit = offset & 31, res;
48
49 if (bit) {
50 /*
51 * Look for zero in the first 32 bits.
52 */
53 __asm__("bsfl %1,%0\n\t"
54 "jne 1f\n\t"
55 "movl $32, %0\n"
56 "1:"
57 : "=r" (set)
58 : "r" (~(*p >> bit)));
59 if (set < (32 - bit))
60 return set + offset;
61 set = 32 - bit;
62 p++;
63 }
64 /*
65 * No zero yet, search remaining full bytes for a zero
66 */
67 res = find_first_zero_bit(p, size - 32 * (p - addr));
68 return (offset + set + res);
69}
70EXPORT_SYMBOL(find_next_zero_bit);
diff --git a/arch/x86/lib/bitops_64.c b/arch/x86/lib/bitops_64.c
index 0e8f491e6ccc..0eeb704d2513 100644
--- a/arch/x86/lib/bitops_64.c
+++ b/arch/x86/lib/bitops_64.c
@@ -1,9 +1,7 @@
1#include <linux/bitops.h> 1#include <linux/bitops.h>
2 2
3#undef find_first_zero_bit 3#undef find_first_zero_bit
4#undef find_next_zero_bit
5#undef find_first_bit 4#undef find_first_bit
6#undef find_next_bit
7 5
8static inline long 6static inline long
9__find_first_zero_bit(const unsigned long * addr, unsigned long size) 7__find_first_zero_bit(const unsigned long * addr, unsigned long size)
@@ -57,39 +55,6 @@ long find_first_zero_bit(const unsigned long * addr, unsigned long size)
57 return __find_first_zero_bit (addr, size); 55 return __find_first_zero_bit (addr, size);
58} 56}
59 57
60/**
61 * find_next_zero_bit - find the next zero bit in a memory region
62 * @addr: The address to base the search on
63 * @offset: The bitnumber to start searching at
64 * @size: The maximum size to search
65 */
66long find_next_zero_bit (const unsigned long * addr, long size, long offset)
67{
68 const unsigned long * p = addr + (offset >> 6);
69 unsigned long set = 0;
70 unsigned long res, bit = offset&63;
71
72 if (bit) {
73 /*
74 * Look for zero in first word
75 */
76 asm("bsfq %1,%0\n\t"
77 "cmoveq %2,%0"
78 : "=r" (set)
79 : "r" (~(*p >> bit)), "r"(64L));
80 if (set < (64 - bit))
81 return set + offset;
82 set = 64 - bit;
83 p++;
84 }
85 /*
86 * No zero yet, search remaining full words for a zero
87 */
88 res = __find_first_zero_bit (p, size - 64 * (p - addr));
89
90 return (offset + set + res);
91}
92
93static inline long 58static inline long
94__find_first_bit(const unsigned long * addr, unsigned long size) 59__find_first_bit(const unsigned long * addr, unsigned long size)
95{ 60{
@@ -136,40 +101,7 @@ long find_first_bit(const unsigned long * addr, unsigned long size)
136 return __find_first_bit(addr,size); 101 return __find_first_bit(addr,size);
137} 102}
138 103
139/**
140 * find_next_bit - find the first set bit in a memory region
141 * @addr: The address to base the search on
142 * @offset: The bitnumber to start searching at
143 * @size: The maximum size to search
144 */
145long find_next_bit(const unsigned long * addr, long size, long offset)
146{
147 const unsigned long * p = addr + (offset >> 6);
148 unsigned long set = 0, bit = offset & 63, res;
149
150 if (bit) {
151 /*
152 * Look for nonzero in the first 64 bits:
153 */
154 asm("bsfq %1,%0\n\t"
155 "cmoveq %2,%0\n\t"
156 : "=r" (set)
157 : "r" (*p >> bit), "r" (64L));
158 if (set < (64 - bit))
159 return set + offset;
160 set = 64 - bit;
161 p++;
162 }
163 /*
164 * No set bit yet, search remaining full words for a bit
165 */
166 res = __find_first_bit (p, size - 64 * (p - addr));
167 return (offset + set + res);
168}
169
170#include <linux/module.h> 104#include <linux/module.h>
171 105
172EXPORT_SYMBOL(find_next_bit);
173EXPORT_SYMBOL(find_first_bit); 106EXPORT_SYMBOL(find_first_bit);
174EXPORT_SYMBOL(find_first_zero_bit); 107EXPORT_SYMBOL(find_first_zero_bit);
175EXPORT_SYMBOL(find_next_zero_bit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-24 15:08:28 -0500