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s390/bitops: use register pair instead of register asm

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Get rid of register asm statement and use a register pair.
This allows the compiler to allocate registers on its own.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens
2021-06-09 22:59:13 +02:00
committed by Vasily Gorbik
parent c4655a2098
commit 4f38c7aefe
1 changed files with 5 additions and 5 deletions
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10
arch/s390/include/asm/bitops.h
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@@ -299,13 +299,13 @@ static inline unsigned char __flogr(unsigned long word)
}
return bit;
} else {
register unsigned long bit asm("4") = word;
register unsigned long out asm("5");
union register_pair rp;
rp.even = word;
asm volatile(
" flogr %[bit],%[bit]\n"
: [bit] "+d" (bit), [out] "=d" (out) : : "cc");
return bit;
" flogr %[rp],%[rp]\n"
: [rp] "+d" (rp.pair) : : "cc");
return rp.even;
}
}