forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.0 KiB
95 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* Port on Texas Instruments TMS320C6x architecture |
|
* |
|
* Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated |
|
* Author: Aurelien Jacquiot ([email protected]) |
|
*/ |
|
#ifndef _ASM_C6X_BITOPS_H |
|
#define _ASM_C6X_BITOPS_H |
|
|
|
#ifdef __KERNEL__ |
|
|
|
#include <linux/bitops.h> |
|
#include <asm/byteorder.h> |
|
#include <asm/barrier.h> |
|
|
|
/* |
|
* We are lucky, DSP is perfect for bitops: do it in 3 cycles |
|
*/ |
|
|
|
/** |
|
* __ffs - find first bit in word. |
|
* @word: The word to search |
|
* |
|
* Undefined if no bit exists, so code should check against 0 first. |
|
* Note __ffs(0) = undef, __ffs(1) = 0, __ffs(0x80000000) = 31. |
|
* |
|
*/ |
|
static inline unsigned long __ffs(unsigned long x) |
|
{ |
|
asm (" bitr .M1 %0,%0\n" |
|
" nop\n" |
|
" lmbd .L1 1,%0,%0\n" |
|
: "+a"(x)); |
|
|
|
return x; |
|
} |
|
|
|
/* |
|
* ffz - find first zero in word. |
|
* @word: The word to search |
|
* |
|
* Undefined if no zero exists, so code should check against ~0UL first. |
|
*/ |
|
#define ffz(x) __ffs(~(x)) |
|
|
|
/** |
|
* fls - find last (most-significant) bit set |
|
* @x: the word to search |
|
* |
|
* This is defined the same way as ffs. |
|
* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. |
|
*/ |
|
static inline int fls(unsigned int x) |
|
{ |
|
if (!x) |
|
return 0; |
|
|
|
asm (" lmbd .L1 1,%0,%0\n" : "+a"(x)); |
|
|
|
return 32 - x; |
|
} |
|
|
|
/** |
|
* ffs - find first bit set |
|
* @x: the word to search |
|
* |
|
* This is defined the same way as |
|
* the libc and compiler builtin ffs routines, therefore |
|
* differs in spirit from the above ffz (man ffs). |
|
* Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32. |
|
*/ |
|
static inline int ffs(int x) |
|
{ |
|
if (!x) |
|
return 0; |
|
|
|
return __ffs(x) + 1; |
|
} |
|
|
|
#include <asm-generic/bitops/__fls.h> |
|
#include <asm-generic/bitops/fls64.h> |
|
#include <asm-generic/bitops/find.h> |
|
|
|
#include <asm-generic/bitops/sched.h> |
|
#include <asm-generic/bitops/hweight.h> |
|
#include <asm-generic/bitops/lock.h> |
|
|
|
#include <asm-generic/bitops/atomic.h> |
|
#include <asm-generic/bitops/non-atomic.h> |
|
#include <asm-generic/bitops/le.h> |
|
#include <asm-generic/bitops/ext2-atomic.h> |
|
|
|
#endif /* __KERNEL__ */ |
|
#endif /* _ASM_C6X_BITOPS_H */
|
|
|