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https://opencores.org/ocsvn/or1k_soc_on_altera_embedded_dev_kit/or1k_soc_on_altera_embedded_dev_kit/trunk
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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [lib/] [rwlock_64.S] - Rev 3
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/* Slow paths of read/write spinlocks. */
#include <linux/linkage.h>
#include <asm/rwlock.h>
#include <asm/alternative-asm.h>
#include <asm/dwarf2.h>
/* rdi: pointer to rwlock_t */
ENTRY(__write_lock_failed)
CFI_STARTPROC
LOCK_PREFIX
addl $RW_LOCK_BIAS,(%rdi)
1: rep
nop
cmpl $RW_LOCK_BIAS,(%rdi)
jne 1b
LOCK_PREFIX
subl $RW_LOCK_BIAS,(%rdi)
jnz __write_lock_failed
ret
CFI_ENDPROC
END(__write_lock_failed)
/* rdi: pointer to rwlock_t */
ENTRY(__read_lock_failed)
CFI_STARTPROC
LOCK_PREFIX
incl (%rdi)
1: rep
nop
cmpl $1,(%rdi)
js 1b
LOCK_PREFIX
decl (%rdi)
js __read_lock_failed
ret
CFI_ENDPROC
END(__read_lock_failed)