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author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-28 16:56:43 +0200 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-28 16:56:43 +0200 |
commit | 94c12cc7d196bab34aaa98d38521549fa1e5ef76 (patch) | |
tree | 8e0cec0ed44445d74a2cb5160303d6b4dfb1bc31 /include/asm-s390/timex.h | |
parent | 25d83cbfaa44e1b9170c0941c3ef52ca39f54ccc (diff) | |
download | kernel_samsung_smdk4412-94c12cc7d196bab34aaa98d38521549fa1e5ef76.zip kernel_samsung_smdk4412-94c12cc7d196bab34aaa98d38521549fa1e5ef76.tar.gz kernel_samsung_smdk4412-94c12cc7d196bab34aaa98d38521549fa1e5ef76.tar.bz2 |
[S390] Inline assembly cleanup.
Major cleanup of all s390 inline assemblies. They now have a common
coding style. Quite a few have been shortened, mainly by using register
asm variables. Use of the EX_TABLE macro helps as well. The atomic ops,
bit ops and locking inlines new use the Q-constraint if a newer gcc
is used. That results in slightly better code.
Thanks to Christian Borntraeger for proof reading the changes.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390/timex.h')
-rw-r--r-- | include/asm-s390/timex.h | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/include/asm-s390/timex.h b/include/asm-s390/timex.h index 5d0332a..4df4a41 100644 --- a/include/asm-s390/timex.h +++ b/include/asm-s390/timex.h @@ -15,20 +15,21 @@ typedef unsigned long long cycles_t; -static inline cycles_t get_cycles(void) -{ - cycles_t cycles; - - __asm__ __volatile__ ("stck 0(%1)" : "=m" (cycles) : "a" (&cycles) : "cc"); - return cycles >> 2; -} - static inline unsigned long long get_clock (void) { unsigned long long clk; - __asm__ __volatile__ ("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc"); +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) + asm volatile("stck %0" : "=Q" (clk) : : "cc"); +#else /* __GNUC__ */ + asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc"); +#endif /* __GNUC__ */ return clk; } +static inline cycles_t get_cycles(void) +{ + return (cycles_t) get_clock() >> 2; +} + #endif |