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-rw-r--r--qemu/util/bitops.c159
1 files changed, 0 insertions, 159 deletions
diff --git a/qemu/util/bitops.c b/qemu/util/bitops.c
deleted file mode 100644
index b0c35dd5f..000000000
--- a/qemu/util/bitops.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * Copyright (C) 2008 IBM Corporation
- * Written by Rusty Russell <rusty@rustcorp.com.au>
- * (Inspired by David Howell's find_next_bit implementation)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include "qemu/osdep.h"
-#include "qemu/bitops.h"
-
-#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
-
-/*
- * Find the next set bit in a memory region.
- */
-unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
- unsigned long offset)
-{
- const unsigned long *p = addr + BITOP_WORD(offset);
- unsigned long result = offset & ~(BITS_PER_LONG-1);
- unsigned long tmp;
-
- if (offset >= size) {
- return size;
- }
- size -= result;
- offset %= BITS_PER_LONG;
- if (offset) {
- tmp = *(p++);
- tmp &= (~0UL << offset);
- if (size < BITS_PER_LONG) {
- goto found_first;
- }
- if (tmp) {
- goto found_middle;
- }
- size -= BITS_PER_LONG;
- result += BITS_PER_LONG;
- }
- while (size >= 4*BITS_PER_LONG) {
- unsigned long d1, d2, d3;
- tmp = *p;
- d1 = *(p+1);
- d2 = *(p+2);
- d3 = *(p+3);
- if (tmp) {
- goto found_middle;
- }
- if (d1 | d2 | d3) {
- break;
- }
- p += 4;
- result += 4*BITS_PER_LONG;
- size -= 4*BITS_PER_LONG;
- }
- while (size >= BITS_PER_LONG) {
- if ((tmp = *(p++))) {
- goto found_middle;
- }
- result += BITS_PER_LONG;
- size -= BITS_PER_LONG;
- }
- if (!size) {
- return result;
- }
- tmp = *p;
-
-found_first:
- tmp &= (~0UL >> (BITS_PER_LONG - size));
- if (tmp == 0UL) { /* Are any bits set? */
- return result + size; /* Nope. */
- }
-found_middle:
- return result + ctzl(tmp);
-}
-
-/*
- * This implementation of find_{first,next}_zero_bit was stolen from
- * Linus' asm-alpha/bitops.h.
- */
-unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
- unsigned long offset)
-{
- const unsigned long *p = addr + BITOP_WORD(offset);
- unsigned long result = offset & ~(BITS_PER_LONG-1);
- unsigned long tmp;
-
- if (offset >= size) {
- return size;
- }
- size -= result;
- offset %= BITS_PER_LONG;
- if (offset) {
- tmp = *(p++);
- tmp |= ~0UL >> (BITS_PER_LONG - offset);
- if (size < BITS_PER_LONG) {
- goto found_first;
- }
- if (~tmp) {
- goto found_middle;
- }
- size -= BITS_PER_LONG;
- result += BITS_PER_LONG;
- }
- while (size & ~(BITS_PER_LONG-1)) {
- if (~(tmp = *(p++))) {
- goto found_middle;
- }
- result += BITS_PER_LONG;
- size -= BITS_PER_LONG;
- }
- if (!size) {
- return result;
- }
- tmp = *p;
-
-found_first:
- tmp |= ~0UL << size;
- if (tmp == ~0UL) { /* Are any bits zero? */
- return result + size; /* Nope. */
- }
-found_middle:
- return result + ctzl(~tmp);
-}
-
-unsigned long find_last_bit(const unsigned long *addr, unsigned long size)
-{
- unsigned long words;
- unsigned long tmp;
-
- /* Start at final word. */
- words = size / BITS_PER_LONG;
-
- /* Partial final word? */
- if (size & (BITS_PER_LONG-1)) {
- tmp = (addr[words] & (~0UL >> (BITS_PER_LONG
- - (size & (BITS_PER_LONG-1)))));
- if (tmp) {
- goto found;
- }
- }
-
- while (words) {
- tmp = addr[--words];
- if (tmp) {
- found:
- return words * BITS_PER_LONG + BITS_PER_LONG - 1 - clzl(tmp);
- }
- }
-
- /* Not found */
- return size;
-}