ldstub [%g1 + 3], %g2
b ___rw_read_enter_spin_on_wlock
ldub [%g1 + 3], %g2
+___rw_read_try_spin_on_wlock:
+ andcc %g2, 0xff, %g0
+ be,a ___rw_read_try
+ ldstub [%g1 + 3], %g2
+ xnorcc %g2, 0x0, %o0 /* if g2 is ~0, set o0 to 0 and bugger off */
+ bne,a ___rw_read_enter_spin_on_wlock
+ ld [%g1], %g2
+ retl
+ mov %g4, %o7
___rw_read_exit_spin_on_wlock:
orcc %g2, 0x0, %g0
be,a ___rw_read_exit
retl
mov %g4, %o7
+ .globl ___rw_read_try
+___rw_read_try:
+ orcc %g2, 0x0, %g0
+ bne ___rw_read_try_spin_on_wlock
+ ld [%g1], %g2
+ add %g2, 1, %g2
+ st %g2, [%g1]
+ set 1, %o1
+ retl
+ mov %g4, %o7
+
.globl ___rw_write_enter
___rw_write_enter:
orcc %g2, 0x0, %g0