evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

sh: Plug in SH-5 ffz()/__ffs() bitops.

Browse source 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2007-11-11 17:28:18 +09:00
parent 079060c6ff
commit 63e2c80332
1 changed files with 26 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
include/asm-sh/bitops.h
View file

@ -105,6 +105,7 @@ static inline int test_and_change_bit(int nr, volatile void * addr)
#include <asm-generic/bitops/non-atomic.h> #include <asm-generic/bitops/non-atomic.h>
#ifdef CONFIG_SUPERH32
static inline unsigned long ffz(unsigned long word) static inline unsigned long ffz(unsigned long word)
{ {
unsigned long result; unsigned long result;
@ -138,6 +139,31 @@ static inline unsigned long __ffs(unsigned long word)
: "t"); : "t");
return result; return result;
} }
#else
static inline unsigned long ffz(unsigned long word)
{
unsigned long result, __d2, __d3;
__asm__("gettr tr0, %2\n\t"
"pta $+32, tr0\n\t"
"andi %1, 1, %3\n\t"
"beq %3, r63, tr0\n\t"
"pta $+4, tr0\n"
"0:\n\t"
"shlri.l %1, 1, %1\n\t"
"addi %0, 1, %0\n\t"
"andi %1, 1, %3\n\t"
"beqi %3, 1, tr0\n"
"1:\n\t"
"ptabs %2, tr0\n\t"
: "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
: "0" (0L), "1" (word));
return result;
}
#include <asm-generic/bitops/__ffs.h>
#endif
#include <asm-generic/bitops/find.h> #include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/ffs.h> #include <asm-generic/bitops/ffs.h>