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#define ASM_MAPPING 1
#include "la64_mapping.h"
#undef ASM_MAPPING
// LA64 lock helper
// there is 2 part: read and write
// write return 0 on success, 1 on fail (value has been changed)
.text
.align 4
.global la64_lock_xchg_b
.global la64_lock_xchg_dd
.global la64_lock_xchg_d
.global la64_lock_storeifnull
.global la64_lock_storeifnull_d
.global la64_lock_storeifref
.global la64_lock_storeifref2
.global la64_lock_storeifref_d
.global la64_lock_storeifref2_d
.global la64_lock_storeb
.global la64_lock_incif0
.global la64_lock_decifnot0
.global la64_lock_store
.global la64_lock_store_dd
.global la64_lock_cas_b
.global la64_lock_cas_h
.global la64_lock_cas_d
.global la64_lock_cas_dd
.global la64_lock_cas_dq
.global la64_lock_get_b
.global la64_lock_get_d
.global la64_lock_get_dd
la64_lock_xchg_b:
.word 0x385e1486 // amswap_db.b $a2, $a1, $a0
move $a0, $a2
ret
la64_lock_xchg_dd:
// address is a0, value is a1, return old value in a0
amswap_db.d $a2, $a1, $a0
move $a0, $a2
ret
la64_lock_xchg_d:
// address is a0, value is a1, return old value in a0
amswap_db.w $a2, $a1, $a0
move $a0, $a2
ret
la64_lock_storeifnull:
// address is a0, value is a1, a1 store to a0 only if [a0] is 0. return old [a0] value
dbar 0
1:
move $a3, $a1
ll.d $a2, $a0, 0
bnez $a2, 2f
sc.d $a3, $a0, 0
beqz $a3, 1b
2:
move $a0, $a2
ret
la64_lock_storeifnull_d:
// address is a0, value is a1, a1 store to a0 only if [a0] is 0. return old [a0] value
dbar 0
move $a3, $a1
1:
ll.w $a2, $a0, 0
bnez $a2, 2f
sc.w $a3, $a0, 0
beqz $a3, 1b
2:
move $a0, $a2
ret
la64_lock_storeifref:
// address is a0, value is a1, a1 store to a0 only if [a0] is a2. return new [a0] value (so a1 or old value)
dbar 0
1:
move $a4, $a1
ll.d $a3, $a0, 0
bne $a2, $a3, 2f
sc.d $a4, $a0, 0
beqz $a4, 1b
move $a0, $a1
ret
2:
move $a0, $a3
ret
la64_lock_storeifref_d:
// address is a0, value is a1, a1 store to a0 only if [a0] is a2. return new [a0] value (so a1 or old value)
dbar 0
1:
move $a4, $a1
ll.w $a3, $a0, 0
bne $a2, $a3, 2f
sc.w $a4, $a0, 0
beqz $a4, 1b
move $a0, $a1
ret
2:
move $a0, $a3
ret
la64_lock_storeifref2_d:
// address is a0, value is a1, a1 store to a0 only if [a0] is a2. return old [a0] value
dbar 0
1:
move $a4, $a1
ll.w $a3, $a0, 0
bne $a2, $a3, 2f
sc.w $a4, $a0, 0
beqz $a4, 1b
2:
move $a0, $a3
ret
la64_lock_storeifref2:
// address is a0, value is a1, a1 store to a0 only if [a0] is a2. return old [a0] value
dbar 0
1:
move $a4, $a1
ll.d $a3, $a0, 0
bne $a2, $a3, 2f
sc.d $a4, $a0, 0
beqz $a4, 1b
2:
move $a0, $a3
ret
la64_lock_storeb:
st.b $a1, $a0, 0
dbar 0
ret
la64_lock_decifnot0:
dbar 0
1:
ll.w $a1, $a0, 0
beqz $a1, 2f
addi.d $a1, $a1, -1
move $a2, $a1
sc.w $a2, $a0, 0
beqz $a2, 1b
2:
move $a0, $a1
ret
la64_lock_incif0:
dbar 0
1:
ll.w $a1, $a0, 0
bnez $a1, 2f
addi.d $a1, $a1, 1
move $a2, $a1
sc.w $a2, $a0, 0
beqz $a2, 1b
2:
move $a0, $a1
ret
la64_lock_store:
st.w $a1, $a0, 0
dbar 0
ret
la64_lock_store_dd:
st.d $a1, $a0, 0
dbar 0
ret
la64_lock_cas_b:
ext.w.b $a3, $a1
.word 0x385a1885 // amcas_db.b $a1, $a2, $a0
xor $a0, $a1, $a3
sltu $a0, $zero, $a0
ret
la64_lock_cas_h:
ext.w.h $a3, $a1
.word 0x385a9885 // amcas_db.h $a1, $a2, $a0
xor $a0, $a1, $a3
sltu $a0, $zero, $a0
ret
la64_lock_cas_d:
ll.w $a3, $a0, 0
bne $a3, $a1, 1f
sc.w $a2, $a0, 0
xori $a0, $a2, 1 // sc return success in $a2, overwriting it! 0 = fail, 1 = success
ret
1:
li.d $a0, 1
ret
la64_lock_cas_dd:
ll.d $a3, $a0, 0
bne $a3, $a1, 1f
sc.d $a2, $a0, 0
xori $a0, $a2, 1
1:
ret
li.d $a0, 1
ret
la64_lock_cas_dq:
ll.d $a4, $a0, 0
bne $a4, $a2, 1f
.word 0x38571c85 // sc.q $a1, $a3, $a0
beqz $a1, 1f
xori $a0, $a1, 1
ret
1:
li.d $a0, 1
ret
la64_lock_get_b:
dbar 0
ld.b $a0, $a0, 0
ret
la64_lock_get_d:
dbar 0
ld.w $a0, $a0, 0
ret
la64_lock_get_dd:
dbar 0
ld.d $a0, $a0, 0
ret
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