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Fixup a few lose ends in explicit support for MIPS R1/R2.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2005-10-07 16:58:15 +01:00
parent f92c1759a4
commit ec917c2c1a
13 changed files with 50 additions and 51 deletions
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56
include/asm-mips/bitops.h
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@@ -12,6 +12,7 @@
#include <linux/config.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/bug.h>
#include <asm/byteorder.h> /* sigh ... */
#include <asm/cpu-features.h>
@@ -546,34 +547,28 @@ static inline int test_bit(unsigned long nr, const volatile unsigned long *addr)
return 1UL & (addr[nr >> SZLONG_LOG] >> (nr & SZLONG_MASK));
}
#ifdef CONFIG_CPU_MIPS32_R1
/*
* Return the bit position (0..31) of the most significant 1 bit in a word
* Returns -1 if no 1 bit exists
*/
static __inline__ int __ilog2(unsigned long x)
{
int lz;
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (lz)
: "r" (x));
return 31 - lz;
}
#elif defined(CONFIG_CPU_MIPS64_R1)
/*
* Return the bit position (0..63) of the most significant 1 bit in a word
* Returns -1 if no 1 bit exists
*/
static __inline__ int __ilog2(unsigned long x)
static inline int __ilog2(unsigned long x)
{
int lz;
if (sizeof(x) == 4) {
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (lz)
: "r" (x));
return 31 - lz;
}
BUG_ON(sizeof(x) != 8);
__asm__ (
" .set push \n"
" .set mips64 \n"
@@ -584,7 +579,6 @@ static __inline__ int __ilog2(unsigned long x)
return 63 - lz;
}
#endif
/*
* __ffs - find first bit in word.
@@ -595,7 +589,7 @@ static __inline__ int __ilog2(unsigned long x)
*/
static inline unsigned long __ffs(unsigned long word)
{
#if defined(CONFIG_CPU_MIPS32_R1) || defined(CONFIG_CPU_MIPS64_R1)
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return __ilog2(word & -word);
#else
int b = 0, s;
@@ -606,6 +600,8 @@ static inline unsigned long __ffs(unsigned long word)
s = 4; if (word << 28 != 0) s = 0; b += s; word >>= s;
s = 2; if (word << 30 != 0) s = 0; b += s; word >>= s;
s = 1; if (word << 31 != 0) s = 0; b += s;
return b;
#endif
#ifdef CONFIG_64BIT
s = 32; if (word << 32 != 0) s = 0; b += s; word >>= s;
@@ -614,9 +610,10 @@ static inline unsigned long __ffs(unsigned long word)
s = 4; if (word << 60 != 0) s = 0; b += s; word >>= s;
s = 2; if (word << 62 != 0) s = 0; b += s; word >>= s;
s = 1; if (word << 63 != 0) s = 0; b += s;
#endif
return b;
#endif
#endif
}
/*
@@ -655,10 +652,10 @@ static inline unsigned long ffz(unsigned long word)
*/
static inline unsigned long flz(unsigned long word)
{
#if defined(CONFIG_CPU_MIPS32_R1) || defined(CONFIG_CPU_MIPS64_R1)
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return __ilog2(~word);
#else
#if defined(CONFIG_32BIT)
#ifdef CONFIG_32BIT
int r = 31, s;
word = ~word;
s = 16; if ((word & 0xffff0000)) s = 0; r -= s; word <<= s;
@@ -666,8 +663,10 @@ static inline unsigned long flz(unsigned long word)
s = 4; if ((word & 0xf0000000)) s = 0; r -= s; word <<= s;
s = 2; if ((word & 0xc0000000)) s = 0; r -= s; word <<= s;
s = 1; if ((word & 0x80000000)) s = 0; r -= s;
return r;
#endif
#if defined(CONFIG_64BIT)
#ifdef CONFIG_64BIT
int r = 63, s;
word = ~word;
s = 32; if ((word & 0xffffffff00000000UL)) s = 0; r -= s; word <<= s;
@@ -676,9 +675,10 @@ static inline unsigned long flz(unsigned long word)
s = 4; if ((word & 0xf000000000000000UL)) s = 0; r -= s; word <<= s;
s = 2; if ((word & 0xc000000000000000UL)) s = 0; r -= s; word <<= s;
s = 1; if ((word & 0x8000000000000000UL)) s = 0; r -= s;
#endif
return r;
#endif
#endif
}
/*